Reciprocating Compressor Questions And Answers





Pick up the wrong statement. A reading of -20°F or higher at 80 lb/in indicates that the dehydrator is not operating properly, and you should check the applicable technical manual to correct the problem. 5 m3/mt 3 m3/mt. Mechanical Engineering MCQ questions and answers especially for the Mechanical Engineer and who preparing for GATE Exam. Reciprocating air compressor is best suited for. edu is a platform for academics to share research papers. In out day-to-day activities compressed air is used for power tools such as air hammers, drills, and wrenches among other household tools. A tool, such. Gas transmission pipelines, petrochemical plants, refineries and many other industries all. With power to run 1-inch impact wrenches combined with generators, welders or jump starters in the field or on the job site, this is what you need when you need to get the job done. The compressor has a similar design to an internal combustion engine; it even looks similar. D 2 Your Comments. Dry Hydrogen gas. A refrigerant should have (a) Tow specific heat of liquid (b) high boiling point (c) high latent heat of vaporisation (d) higher critical temperature (e) low specific volume of vapour. Intercooler and Aftercooler 6 VIII. Interview Questions with professional interview answer examples with advice on how to answer each question. Free air is the air at (a) atmospheric conditions at any specific location (b) 20°C and 1 kg/cm2 and relative humidity of 36% (c) 0°C and standard atmospheric conditions (d) 15°C and 1 kg/cm2 (e) 25°C, 1 kg/cm2 and relative humidity of 50%. Gas trapped in a reciprocating-piston compressor's clearance space expands at the. Show ALL calculations and units. What is the equation for piston displacement? V=A*H: What is Cylinder Compression Ratio? Comparison of volume TDC and BDC: what ignites the fuel/air mixture? the spark plug: What is the stroke? Distance from Top Dead Center to Bottom Dead Center. OBJECTIVE QUESTIONS (REFRIGERATION) 1. There are various types of compressors used in the refrigeration and air conditioning machines, these are: reciprocating, rotary, screw, centrifugal and scroll. marked on a cylinder stand for? Question5: What are the two main constituents of L. Compressors are intended to compress a substance in a gaseous state. Operating Range of Reciprocating Compressor 4 VI. Refrigeration & Air-Conditioning Objective Questions With Answers - Set 01 Practice Test: Question Set - 01 1. c) shock mounts point toward the engine's center of gravity. Compressed air enters the cylinder, expands, and forces the piston to move. Excessive crank end play. Not only is refrigerant expensive, but refrigerant leaks will cause the compressor to eventually go out. Hydraulics and Pneumatics Question paper (2020 Updated) This article is about( Hydraulics and Pneumatics Question paper) based on the hydraulic and pneumatic subject this contains model questions and answers from previous exams, This article is just to prepare for the exams. State your assumptions. Main Component of Reciprocating Compressor 3 V. txt) or view presentation slides online. No explanation is available for this. A reciprocating compressor is a positive-displacement compressor that uses pistons driven by a crankshaft to deliver gases at high pressure. Study Chapter 1 - Reciprocating Engines - Oral Questions flashcards from Chamour Labbe's class online, or in Brainscape's iPhone or Android app. Various options are given as possible answers to the following questions. higher than c. An oil slinger is used with reciprocating compressors that are lubricated by: B) Pressure lubrication. Water or brine pumps may be insulated with (5. Latest Refrigeration and Air Conditioning Questions and Answers 1. In out day-to-day activities compressed air is used for power tools such as air hammers, drills, and wrenches among other household tools. Choose from 500 different sets of hvac unit 47 flashcards on Quizlet. Thermodynamics / Questions and Answers Related Content A quantity of air is compressed polytropically in a closed piston-in-cylinder type reciprocating compressor, the law of the process being. Refrigeration Basics Quiz Questions 3: HVAC Basics. Both answers are correct. The operator must carefully evaluate site conditions of the application before making a choice. A reciprocating compressor is a positive-displacement compressor that uses pistons driven by a crankshaft to deliver gases at high pressure. Compressor Questions. Give major classifications of compressors and the basic principle of its working. 1 st stage piston relatively larger and 2 nd stage piston smaller in comparison, materials respectively aluminum and cast iron. marked on a cylinder stand for? Question5: What are the two main constituents of L. Small quantity of air at high pressure C. Hydraulics and Pneumatics Question paper (2020 Updated) This article is about( Hydraulics and Pneumatics Question paper) based on the hydraulic and pneumatic subject this contains model questions and answers from previous exams, This article is just to prepare for the exams. Anna University ME6404 Thermal Engineering Notes Syllabus 2 marks with answers Part A Question Bank with answers Key UNIT IV AIR COMPRESSOR Volumetric efficiency, Isothermal efficiency and Isentropic efficiency of reciprocating compressors, Multistage air compressor and inter cooling -work of multistage air compressor. Leaking valves in a low pressure, reciprocating, air compressor can result from _____ A. We are a leading provider of high quality industrial equipment, technologies and services. Scavenging and Turbocharging. Unit Conversion 3 IV. At the suction, p1=15 psia; at discharge, p2=80 psia. If you do not answer a The most commonly used air compressor is the reciprocating air compressor. Unlike reciprocating piston compressors, rotary screw rotors don't touch and have fewer moving parts, and because they are oil-sealed, they require. This depends on the type of compressor you purchase. (Answers 537. Best Compressors Interview Questions Part - 2. Which of the following type does Screw compressor belongs to? a) Positive displacement compressor b) Dynamic compressors c) Both a & b d) None of the above 2. Gas LiquefactionAir Compression serviceRefrigerant compression serviceRefueling applications. Thermodynamics / Questions and Answers Related Content A quantity of air is compressed polytropically in a closed piston-in-cylinder type reciprocating compressor, the law of the process being. chandarasekar. Hydraulic Components | Interview Question and Answers Hydraulic Components - Hydraulic and Pneumatic| Interview, viva ,oral Question and Answers 1. Ariel's online learning offerings give you the ability to learn about the fundamentals of gas compression and Ariel compressor parts and components. To enable compression in two stages. Answer: C - While initial price may play a part in a compressor purchase, operators should always look at the reliability, quality and energy efficiency of a machine. • Describe the various working parts of reciprocating and rotary compressors. Which of the following is used for testing the leaks in the entire refrigeration circuit before it can be charged with refrigerant: Dry Nitrogen gas. Questions (9) Publications. Choosing between reciprocating and centrifugal compressor for an application depends on a host of operating conditions. D) Oil slingers are only used with scroll compressors. If you do not answer a The most commonly used air compressor is the reciprocating air compressor. The type of refrigerant that your air conditioner needs may also cause you problems down the road. / Test Your knowledge on Compressors - Online Quiz. ppt), PDF File (. 0 of 17 questions answered correctly. Which of the following terminal combinations would show an open circuit if the internal overload device in a hermetic compressor should open due to excessive heat. Thermal Engineering Questions paper with Answers. It would be difficult to buy the right air compressor for your needs without answering a few questions about its intended use. Purpose 2 II. A reciprocating compressor is a device that compresses air by a back-and-forth straight-line motion, like a piston in a cylinder. Repair or replace. Refrigeration & Air-Conditioning Objective Questions With Answers - Set 01 Practice Test: Question Set - 01 1. two-stage reciprocating compressors offer you more choices of compressor sizes and compressor features to suit your needs. me8493 thermal engineering - i short question & answers unit - 2. Here are some differences between centrifugal and reciprocating compressors: 1. Two basic categories of chillers are the. To hear audio, click on the box. This test consists of 100 most important questions that will help you clear the certification exam of the same. Learn faster with spaced repetition. Our HVACR practice exam consists of questions developed by HVAC Excellence, the largest provider of certifications (more than 200,000) in the HVACR industry. HVAC practice exams can be used for professional-growth and to prepare for certification exams. Rotary displacement pump. These objectives can only be achieved by understanding the characteristics, selection criteria, sealing arrangements, common problems, repair techniques as well as their preventive and predictive maintenance. The main components of reciprocating pump are as follows:. 2) are inserted in the suction and discharge lines, they should be in the same plane as the compressor shaft i. Show ALL calculations and units. Reciprocating Compressor. 18) The sensing line for the low pressure cutout switch to a refrigeration system is located. What more can you say about an air compressor? Take the quiz below and get to test out what you know so far. At the suction, p1=15 psia; at discharge, p2=80 psia. Video content below is organized based on commonly asked questions and topics. discharges it with a density of 0. net 11 37 C The reading on the micrometer scale shown in figure "B" in the. They are often some of the most critical and expensive systems at a production facility, and deserve special attention. 1, this mechanism is one of several capable of producing the straight-line, backward-and-forward motion known as reciprocating. Piston compressors can be found in two primary configurations; single-stage and two-stage. Three types of designs include Reciprocating compressor, Rotary compressor, Centrifugal air compressors. Refrigeration Basics Quiz Questions 3: HVAC Basics. Reciprocating pumps are more suitable for low volumes of flow at high pressures. Compressor Interview Questions and Answers-2018 {Part:-1} In this video we discussed most important Compressor Interview Questions and Answers-2018 which has been asked by different top company. In this article, we will learn about the reciprocating compressor basic parts. 013 bar and 15 °C to 7 bar. 304 lb/cu ft. Centrifugal Compressors - Mechanical Engineering (MCQ) questions and answers Home >> Category >> Mechanical Engineering (MCQ) questions and answers >> Centrifugal Compressors 1) The mass flow rate of air compressed in axial flow compressor is _____________centrifugal compressor. lower than b. In each location there may be more than one brush mounted on a Spindle, whenever the current per brush location is more than 70A. b)before the. Global Reciprocating Compressor Market by Manufacturers, Regions, Type and Application, Forecast to 2021 - A reciprocating compressor or piston compressor is a positive-displacement compressor that uses pistons driven by a crankshaft to deliver gases at high pressure. Its time to answer the questions in Compressor Quiz now. Reciprocating Pump A reciprocating pump essentially consist of a piston or plunger which moves to and fro inside a cylinder. b)protect the compressor from low discharge pressure. The best type of reciprocating air compressor oil and appropriate oil viscosity to use for lubrication depends on factors such as the type of gas that is being compressed and the desired discharge pressure. The gpm per pump is 528 or 1584 gpm for all pumps Solution for HVAC Question #8. O pressure alarm and trip. Mechanical Engineering MCQ questions and answers for an engineering student to practice, GATE exam, interview, competitive examination and entrance exam. Tank mounted pumps need no foundation but the tank is to be fixed. Reciprocating Compressors The reciprocating air compressor, illustrated in Figure 1, is. The cylinder valves control the flow of air through the cylinder; these valves act as check valves. 287 kJ/kg°K and n = 1. The operator must carefully evaluate site conditions of the application before making a choice. 1 st stage piston relatively larger and 2 nd stage piston smaller in comparison, materials respectively aluminum and cast iron. 2) are inserted in the suction and discharge lines, they should be in the same plane as the compressor shaft i. C) Splash lubrication. A: Yes, although we strongly recommend implementation of a dryer in your compressor system immediately, due to the amount of damage moisture can do to your system in a short amount of time. Unlike reciprocating piston compressors, rotary screw rotors don't touch and have fewer moving parts, and because they are oil-sealed, they require. Compressed air has numerous uses throughout a facility including the operation of equipment and portable tools. Answer / shri. Study Chapter 1 - Reciprocating Engines - Oral Questions flashcards from Chamour Labbe's class online, or in Brainscape's iPhone or Android app. Reciprocating pump is a _____ a) Negative displacement pump b) Positive displacement pump c) Diaphragm pump. Latest Refrigeration and Air Conditioning Questions and Answers 1. Part – II: Short type questions and answers. None of the above. All the best. 1) For diesel engine starting, where electric motor starting becomes costly and impractical. These conditions range from maximum discharge pressure and temperature to efficiency and cost. We would like to contact you with any additional information you may need as well as answer questions you may have. The first and most important choice you will make is whether to buy a rotary or a reciprocating compressor. In a single stage, single acting reciprocating air compressor, without clearance volume, the work done is maximum during. What Is The Difference Between A Rotary Screw Compressor And A Reciprocating Compressors? Answer : A rotary screw compressor is one that utilizes two intermeshing helical rotors to trap a volume of air, then compress it to a higher pressure. 11MPa, 298K which it delivers at 1. Good post Montmayor. Question 30. marked on a cylinder stand for? Question5: What are the two main constituents of L. Ariel is the largest manufacturer of separable reciprocating gas compressors in the world, setting the standard in quality, reliability, and customer support. You may use a non-programmable scientific calculator and drawing/mathematical instruments. Questions (9) Publications. Read, highlight, and take notes, across web, tablet, and phone. What is meant by double acting compressor? In double acting reciprocating compressor, the suction compression and delivery of air take place on both side of the piston. A reciprocating compressor is a positive-displacement machine that uses a piston to compress a gas and deliver it at high pressure. Reciprocating Single Acting Compressors Reciprocating single acting compressors are generally of one-stage or two-stage design. 3) for semi- hermitic and open reciprocating types and (5. Scroll compressor facts. on StudyBlue. Multiple Choice Questions with Answers on Refrigeration and Air-Conditioning - Set 07 Practice Test: Question Set - 07 1. b)protect the compressor from low discharge pressure. The compressor compresses the refrigerant, which flows to the condenser, where it gets cooled. Drive an expression for the volumetric efficiency of reciprocating air compressors. In this article we will share mmd oral questions and answers of marine air compressor for your meo class 4 preparation New aspirants who are appearing for meo class 4 oral exam are always worried that which kind of questions surveyor will ask in mmd oral so here we will try to cover all the questions regarding marine air compressor which will help you to crack meo class 4 oral exam. Centrifugal compressor. ANSWER: pressure energy, kinetic energy or both. You also find all interview questions at link at the end of this post. Digital scroll compressor is a disengaging solenoid valve for bypassing discharge gas to the suction side of the compressor. What is meant by double acting compressor? In double acting reciprocating compressor, the suction compression and delivery of air take place on both side of the piston. Refrigeration Basics Quiz Questions 3: HVAC Basics. Centrifugal B. Product Information Product information These reciprocating compressors can be used in applications including upstream production (LNG, gas lift, boil-off / residue gas, export, natural gas gathering, natural gas liquids, shale, coal bed methane, enhanced oil recovery - CO2 for natural gas injection), midstream (gas transmission and storage, natural gas gathering, gas injection, FPSO and. Reciprocating Compressors The reciprocating air compressor, illustrated in Figure 1, is. marked on a cylinder stand for? Question5: What are the two main constituents of L. The higher your compression ration, the more heat is produced. In a reciprocating compressor, a volume of air is drawn into a cylinder, it is trapped, and compressed by piston and then discharged into the discharge line. Not only is refrigerant expensive, but refrigerant leaks will cause the compressor to eventually go out. Free air is the air at (a) atmospheric conditions at any specific location (b) 20°C and 1 kg/cm2 and relative humidity of 36% (c) 0°C and standard atmospheric conditions (d) 15°C and 1 kg/cm2 (e) 25°C, 1 kg/cm2 and relative humidity of 50%. The maximum compression ratio in an actual single stage axial flow comperssor is of the order of (a) 1 : 1. It may also be a good idea to replace your vibration pads : 5. Calor Gas. chandarasekar. 1, this mechanism is one of several capable of producing the straight-line, backward-and-forward motion known as reciprocating. A benefit of operation a compressor unloaded is. Reciprocating compressors play a major role in the chemical, petrochemical, gas, and general industry processes. Like any mechanical equipment, a certain amount of maintenance is necessary to keep …. 41 c p = 1010 J/kg K (Answers 657. 18) The sensing line for the low pressure cutout switch to a refrigeration system is located. So basically air compressors convert a low pressure low temperature air into a high pressure high temperature air. A type of reciprocating/positive displacement compressor in which the gas is compressed using a piston cylinder that is connected to a crankshaft. Describe the difference between a reciprocating compressor and a rotary compressor. Find the answers to the questions related to troubleshooting of various machineries onboard like hydrophore system, and they come in Marine Engineering Practice. Explain the construction and working of a centrifugal compressor. Gas LiquefactionAir Compression serviceRefrigerant compression serviceRefueling applications. State your assumptions. What Is The Difference Between A Rotary Screw Compressor And A Reciprocating Compressors? Answer : A rotary screw compressor is one that utilizes two intermeshing helical rotors to trap a volume of air, then compress it to a higher pressure. 11MPa, 298K which it delivers at 1. What is meant by single stage compressor? In …. Compressors are intended to compress a substance in a gaseous state. Here are some of the most frequently asked questions and the most common reciprocating compressor problems. The primary reason for jacket water cooling is to keep the cylinder wall and piston rings from getting too hot. The entire system is made up with PROVEN ways for regular people just like you to get started making money online the RIGHT way the REAL way. Video content below is organized based on commonly asked questions and topics. It then moves to the expansion valve, and the evaporator and. Calor Gas. In a rotary screw compressor, oil should be changed about every 7000-8000 hours. A reciprocating compressor uses pistons to compress air. 0 Prime Movers. multiple choice questions in basic mechanical engineering on topic of Turbo machines for interview, entrance test and competitive examination freely available to download for pdf export. 5 Common Air Conditioning Questions & Answers. In hermetically sealed compressor, the compressor and the motor are enclosed. Reciprocating Pump A reciprocating pump essentially consist of a piston or plunger which moves to and fro inside a cylinder. There are various types of compressors used in the refrigeration and air conditioning machines, these are: reciprocating, rotary, screw, centrifugal and scroll. Units and Symbols 2 III. The answer to this question depends on whether or not you have a continuous duty air compressor or not. Reciprocating Compressor. The rotary compressor is usually very small compared compared to the reciprocating compressor. (Answers 537. Otto, Diesel, Dual, Brayton cycles, Calculation of mean effective pressure, and air standard efficiency - Comparison of cycles. We also enhance productivity through solutions created by Club Car®, the global leader in golf and utility vehicles. It is a mechanical device which helps us to compressing the air where we required. If I understand the question correctly, the answer may be like this. Tags: Question 4. In terms of crankcase oils, the recommended ISO viscosity grade is 68, 100, 150 or 200, which can vary based on the ambient temperature. Suction valves in reciprocating compressor during intake stroke. i) Estimate the water flow rate if water is secondary coolant, ii) Assess the connected motor size (kW) to this refrigeration compressor Capacity of reciprocating compressor = 100 TR. compression cycle and absorption. Choose the answer andwrite only the letter -D) next to the question number(A (1. 5 Common Air Conditioning Questions & Answers. Repair or replace. Compressors can be of a lubricated, non-lubricated or oil-less design. To minimize the work of compression. We've gathered together the most common questions so you can get your preparation off to a flying start. Answer: Option D. txt) or view presentation slides online. OEM—Reciprocating Chiller 7 Configuration– Questions and Answers The Reciprocating Chiller Control is configured by responding to a programmed sequence of questions using HVAC PRO for Windows. Welcome to Sciemce, where you can ask questions and receive answers from other members of the community. The primary reason for jacket water cooling is to keep the cylinder wall and piston rings from getting too hot. Study Chapter 1 - Reciprocating Engines - Oral Questions flashcards from Chamour Labbe's class online, or in Brainscape's iPhone or Android app. 1) Reciprocating Compressor: This. Answered Cas asked 6 years ago. edu is a platform for academics to share research papers. Operating Range of Reciprocating Compressor 4 VI. "CoC Oral Exam Questions & Answers" It was a in line reciprocating 2 stage compressor. Both A and D. Dear Readers, Welcome to Refrigeration and Air Conditioning Objective Questions and Answers have been designed specially to get you acquainted with the nature of questions you may encounter during your Job interview for the subject of Refrigeration and Air Conditioning Multiple choice Questions. OEM—Reciprocating Chiller 7 Configuration– Questions and Answers The Reciprocating Chiller Control is configured by responding to a programmed sequence of questions using HVAC PRO for Windows. Assume R = 0. Determine the work on the air in Btu/min and in hp. Inter stage cooler and after coolers were there. You can unsubscribe at any time. Rotary screw compressors can be run at lower temperatures for 24 hours per day, 365 days a year. To cool the air during compression. What Is Cfm? The notation CFM (Cubic Feet per Minute) refers to a volume of air produced by the air compressor at a given pressure or PSI (Pound per Square Inch) What Is Duty Cycle? A compressor's duty cycle determines the percentage of run time in a full cycle. Posted on May 3, 2016 by Rick Welter. tutorial is mainly about reciprocating compressors. Test Your knowledge on Compressors - Online Quiz. ppt), PDF File (. ME8493 Important 16 Mark Questions Thermal Engineering 1. It is a mechanical device which helps us to compressing the air where we required. Calor Gas. 15 October, 2015. Compressed air has numerous uses throughout a facility including the operation of equipment and portable tools. 309 views 3 answers 0 votes. Problem #8. b)protect the compressor from low discharge pressure. The comparison is studied based on various parameters like maximum and minimum flow, Inlet and outlet pressure, efficiency, Compression ratio, discharge temperature, Flow range, materials of. Stay safe and healthy. If the flow of air through the compressor is perpendicular to its axis,then it is A. Centrifugal Compressor Operations and Maintenance Introduction Maximum efficiency, reliability, and longevity of compressors are of great concern to many industries. Air compressor is a mechanical device it used for compressing the air This device used in various applications like vehicle, train, and aero plains. 1) Reciprocating Compressor: This. reciprocating in the liner There is two valves first one inlet valve second one is Answer / u. Share your thoughts after watching this video. Review questions are included at the end of this chapter. Has the fewest moving parts of any compressor. We would like to contact you with any additional information you may need as well as answer questions you may have. In which the Centrifugal Compressors are widely used in petrochemical industries because of various range of models available and also less maintenance cost. Reciprocating pump is a positive displacement pump where certain volume of liquid is collected in enclosed volume and is discharged using pressure to the required application. By signing up you agree to receive emails from PORTER-CABLE with news, special offers, promotions and other information. Question 2 of 17. Small reciprocating pumps are fixed on a light structural frame and other pumps have metal base bolted with the floor. c)start and stop the compressor upon system demand. Fortunately, our experts have the knowledge to answer all of these questions. In this article, we will learn about the reciprocating compressor basic parts. Large quantity of air at high pressure B. 18) The sensing line for the low pressure cutout switch to a refrigeration system is located. Latest Refrigeration and Air Conditioning Questions and Answers 1. Compressors and pumps will transmit (5. We would like to contact you with any additional information you may need as well as answer questions you may have. Three types of designs include Reciprocating compressor, Rotary compressor, Centrifugal air compressors. Answer Explanation. A standard ice point temperature corresponds to the. What is meant by double acting compressor? In double acting reciprocating compressor, the suction compression and delivery of air take place on both side of the piston. Question: Describe The Major Functions Of The Following Reciprocating Engine Components: Piston, Connecting Rod, Crankshaft, Cams And Camshaft, Valves, Intake And Exhaust Manifolds. The cylinder valves control the flow of air through the cylinder; these valves act as check valves. Determine the work on the air in Btu/min and in hp. Also, the com-pressor capacity is directly proportional to the speed. What Is Cfm? The notation CFM (Cubic Feet per Minute) refers to a volume of air produced by the air compressor at a given pressure or PSI (Pound per Square Inch) What Is Duty Cycle? A compressor's duty cycle determines the percentage of run time in a full cycle. beginning of the suction stroke. Find the work done by the compressor and air power. Reciprocating. Question: An Ideal Vapor-compression Refrigeration Cycle That Uses Refrigerant-134a As Its Working Fluid Maintains A Condenser At 800 KPa And The Evaporator At −12°C. Here are some of the most frequently asked questions and the most common reciprocating compressor problems. Calor Gas. Compressed air has numerous uses throughout a facility including the operation of equipment and portable tools. water and a solution of water and polyethylene. lower than b. In a refrigeration cycle, the flow of refrigerant is controlled by (A) Compressor (B) Condense. In a reciprocating compressor, a volume of air is drawn into a cylinder, it is trapped, and compressed by piston and then discharged into the discharge line. They are two main types of air compressors. D 2 Your Comments. The reciprocating compressor is probably the most versatile of all the types and is only out performed by rotary types when large volumes at low pressures are required. 40 UNIT 15 REVIEW QUESTIONS ANSWER KEY 15-1) What is the only thing all compressors must pump? Vapor 15-2) List the major types of compressors by mechanical design. Freon group of refrigerants are (A) Inflammable (B) Toxic (C) Non-inflammable and toxic (. Trouble shooting questions are answered on another page, there links to other popular air compressor related pages to the right. We are a leading provider of high quality industrial equipment, technologies and services. Scope of the Report: This report focuses on the Reciprocating Compressor in Global market, especially in North America, Europe. Scroll compressor facts. Answered Cas asked 6 years ago. Source: Interview Questions & Answers: Best rgs. In out day-to-day activities compressed air is used for power tools such as air hammers, drills, and wrenches among other household tools. Compressors can be of a lubricated, non-lubricated or oil-less design. ANSWER: pressure energy, kinetic energy or both. Questions to Answer Before Buying an Air Compressor. A standard ice point temperature corresponds to the. What is meant by single stage compressor? In …. Global Reciprocating Compressor Market by Manufacturers, Regions, Type and Application, Forecast to 2021 - A reciprocating compressor or piston compressor is a positive-displacement compressor that uses pistons driven by a crankshaft to deliver gases at high pressure. ANSWER: Centrifugal pump. A reciprocating refrigeration compressor of 100 TR is working at full load with 4. A reciprocating compressor uses pistons to compress air. Problem #8. Share your thoughts after watching this video. Small reciprocating pumps are fixed on a light structural frame and other pumps have metal base bolted with the floor. How much maintenance does my air compressor require? A. It depends on the service and operating conditions. typeII QUESTIONS 1- System dependent recovery CANNOT be used when a-the compressor of the appliance is operational b-the ambient temp is over 105 c- the appliance contains over 15 pounds refrigerant d- the appliance is leaking. So my test is today and I'm not sure about a number of questions that I have on my practice test. Answer: Option D. Refrigeration & Air-Conditioning Objective Questions With Answers - Set 01 Practice Test: Question Set - 01 1. Thermal engineering is the science of energy and it's transformation from one form to another form. By signing up you agree to receive emails from PORTER-CABLE with news, special offers, promotions and other information. Source: Interview Questions & Answers: Best rgs. Our HVACR practice exam consists of questions developed by HVAC Excellence, the largest provider of certifications (more than 200,000) in the HVACR industry. Reciprocating air compressor is best suited for A. For the purposes of this paper, a reciprocating compressor is defined as: A piece of equipment that increases the pressure of a process gas by positive displacement, employing linear movement of the driveshaft. Reciprocating Compressors Reciprocating compressors are the most widely used type for air compression. Give major classifications of compressors and the basic principle of its working. Static Filled Coolant System. Calculate the indicated power required for a free air delivery of 0. Name the basic components required in hydraulic system. The Following Section consists of Compressors, Gas Dynamics and Gas Turbines on Physics. Elgi Equipments Limited is an air compressor manufacturer. 5 Common Air Conditioning Questions & Answers. Operating Range of Reciprocating Compressor 4 VI. Reciprocating—also called "Piston"—air compressors are the most common type and can be found in a wide range of horsepower output. Are fully closed. tutorial is mainly about reciprocating compressors. 0 of 17 questions answered correctly. A reading of -20°F or higher at 80 lb/in indicates that the dehydrator is not operating properly, and you should check the applicable technical manual to correct the problem. 2 Introduction. Find the answers to the questions related to troubleshooting of various machineries onboard like hydrophore system, and they come in Marine Engineering Practice. They are mainly used in high pressure applications since it can deliver air at about 30 – 40 bar. Practice 33 Industrial Air Compressor, Inc. multiple choice questions in basic mechanical engineering on topic of Turbo machines for interview, entrance test and competitive examination freely available to download for pdf export. c) shock mounts point toward the engine's center of gravity. The return stroke may be actuated by compressed air on the other side of the piston or by spring action. Oil and Gas Interview Questions Answers What is Natural Gas, PNG, CNG & LNG? Natural gas as its name indicates is a Gaseous fuel, consisting of 87-92% of Methane with a small percentage of other higher hydrocarbons. What could be the reasons if a synchronous motor fails to start? It is usually due to. Refrigeration And Air Conditioning Air Conditioning Services Air Conditioning System Reciprocating Compressor Air Compressor Hvac Tools Electrical. Various options are given as possible answers to the following questions. There is a central crankshaft that drives anywhere from two to six pistons inside cylinders. I hope you will enjoy this quiz. Positive displacement compressors can be further classified based on the type of mechanism used for compression. 2 (b) 1 : 2 (c) 1 : 5 (d) 1 : 10 (e) 1 : 1 Ans: a. Suction valves in reciprocating compressor during intake stroke. 2340L5-V 5hp 60 gal Two-Stage Compressor (230/1) Designed for Heavy Shop and Industrial Use Delivering 175 psi maximum operating pressure, this 5 horsepower air compressor is designed to meet the demanding needs of automotive service and body shops, fleet maintenance, machine shops, production and manufacturing lines, woodworking shops, dry. 4 Explain the types & working of a compressors ANSWER KEY 5 Explain the construction and working of a root blower NOTES 6 Drive an expression for the volumetric efficiency of reciprocating air compressors ANSWER KEY 7 Drive an expression for the work done by single stage single acting reciprocating air compressor ANSWER KEY 8. Tank mounted pumps need no foundation but the tank is to be fixed. • Describe the various working parts of reciprocating and rotary compressors. beginning of the suction stroke. Answer: Option D. Review questions are included at the end of this chapter. Learn more about Chapter 14: Fans, Blowers, Compressors Text, Questions and Answers on GlobalSpec. Read, highlight, and take notes, across web, tablet, and phone. I work strictly with reciprocating compressors and, generally speaking, we try to stay under a compression ration of 4 buildup but if you're asking how much more efficient it is between the stages i can't give you a definitive answer. You have reached 0 of 0 points, ( 0) Not categorized 0% Question 1 of 17. Questions to Answer Before Buying an Air Compressor. marked on a cylinder stand for? Question5: What are the two main constituents of L. Water or brine pumps may be insulated with (5. the compressor has been operating at excessively high temperatures. 5 MPa, 384 K to an after cooler where the air is cooled at constant pressure to 298 K. Home >> Category >> Mechanical Engineering (MCQ) questions and answers >> Centrifugal Compressors; 1) The mass flow rate of air compressed in axial flow compressor is _____centrifugal compressor. 18) The sensing line for the low pressure cutout switch to a refrigeration system is located. Indicate On An Appropriate Sketch The Different Forces That Act On The Piston, And The Direction Of These Forces, During The Engine's Expansion Stroke With The Piston, Connecting. A hermetically sealed compressor cannot be worked on as the internal components of the compressor are permanently sealed while the semi-hermetic reciprocating compressor is a compressor that can be rebuilt and put back into service. beginning of the suction stroke. Centrifugal Compressors - Mechanical Engineering (MCQ) questions and answers Home >> Category >> Mechanical Engineering (MCQ) questions and answers >> Centrifugal Compressors 1) The mass flow rate of air compressed in axial flow compressor is _____________centrifugal compressor. ppt), PDF File (. question paper. Find the work done by the compressor and air power. Our 300 question HVAC practice test provides: assessment of broad based HVACR knowledge. Interview Questions with professional interview answer examples with advice on how to answer each question. Axial compressors, known as superchargers, have also been used to boost the power of automotive reciprocating engines by compressing the intake air, though these are very rare. The practice application reveals the correct answer instantly right after you submitted the answer for each question and also provides the clause number that the question being taken. In out day-to-day activities compressed air is used for power tools such as air hammers, drills, and wrenches among other household tools. We would like to contact you with any additional information you may need as well as answer questions you may have. Compressor Combination Packages Industrial Duty air compressors for maintenance trucks, service fleets or technicians that need to save space and weight. Turbo compressors are preferred for high mass flow systems because of their simplicity and reliability compared with screw or reciprocating compressors. ME8493 Important 16 Mark Questions Thermal Engineering 1. STUDY MATERIAL FOR THE CERTIFICATE OF FITNESS FOR: G-35 answers to each question. 1 st stage piston relatively larger and 2 nd stage piston smaller in comparison, materials respectively aluminum and cast iron. George Medhurst of England designed the first motorized air compressor in 1799 and used it in mining. the compressor has been operating at excessively high temperatures. RECIPROCATING COMPRESSOR TABLE OF CONTENT I. Learn more about Chapter 14: Fans, Blowers, Compressors Text, Questions and Answers on GlobalSpec. Positive displacement compressors can be further classified based on the type of mechanism used for compression. In a single stage, single acting reciprocating air compressor, without clearance volume, the work done is maximum during. Reciprocating pump is a positive displacement pump where certain volume of liquid is collected in enclosed volume and is discharged using pressure to the required application. Compressors are intended to compress a substance in a gaseous state. Unlike reciprocating piston compressors, rotary screw rotors don't touch and have fewer moving parts, and because they are oil-sealed, they require. Also, the com-pressor capacity is directly proportional to the speed. A standard ice point temperature corresponds to the. (The fluid here is generally air since liquids are theoretically incompressible). Reciprocating pump. Here are some differences between centrifugal and reciprocating compressors: 1. The compressor compresses the refrigerant, which flows to the condenser, where it gets cooled. Excerpts are from the paper "What's correct for my application: A centrifugal or. The cylinder valves control the flow of air through the cylinder; these valves act as check valves. Compressor Questions. Periodically, we like to answer common questions we get from our clients- who sometimes think they can stump our experts. Welcome to Sciemce, where you can ask questions and receive answers from other members of the community. Latest Refrigeration and Air Conditioning Questions and Answers 1. Gas compression process in reciprocating compressor can be expressed such in figure 5. How to Install a Reciprocating Compressor. Choosing between reciprocating and centrifugal compressor for an application depends on a host of operating conditions. Compressor Interview Questions and Answers-2018 {Part:-1} In this video we discussed most important Compressor Interview Questions and Answers-2018 which has been asked by different top company. Scroll compressor facts. To cool the air at delivery. The practice application reveals the correct answer instantly right after you submitted the answer for each question and also provides the clause number that the question being taken. Reciprocating Compressor Technical Support. Time has elapsed. Here are some differences between centrifugal and reciprocating compressors: 1. Calculate the indicated power required for a free air delivery of 0. Impeller diameter E. ME6404 Thermal Engineering (TE) Syllabus UNIT I GAS POWER CYCLES. Compressor Questions. operating the compressor at excessive speed C. • Explain the difference between a hermetic compressor and a semi-hermetic compressor. multiple choice questions in basic mechanical engineering on topic of Turbo machines for interview, entrance test and competitive examination freely available to download for pdf export. they are welded together. Air compressors are sometimes called air pumps. D) Oil slingers are only used with scroll compressors. Its time to answer the questions in Compressor Quiz now. The rotary compressor is usually very small compared compared to the reciprocating compressor. A standard ice point temperature corresponds to the. Refrigeration and Air Conditioning Multiple Choice Questions :-1. Question 30. CoC Oral Exam Preparation (Part - 20): EKG. Both stages were having spring loaded suction and discharge non-return valves. Tank mounted pumps need no foundation but the tank is to be fixed. A refrigerant should have (a) Tow specific heat of liquid (b) high boiling point (c) high latent heat of vaporisation (d) higher critical temperature (e) low specific volume of vapour. Open Danny Frerich asked 4 months ago • Air Compresser Troubleshooting. To cool the air at delivery. Reciprocating pump is a _____ a) Negative displacement pump b) Positive displacement pump c) Diaphragm pump. 2 (b) 1 : 2 (c) 1 : 5 (d) 1 : 10 (e) 1 : 1 Ans: a. Are fully closed. During a compression stroke, 1. We are a leading provider of high quality industrial equipment, technologies and services. In all the household refrigerators, deep freezers, window air conditioners, split air conditioners, most of the packaged air conditioners, the hermetically sealed reciprocating compressor is used. Answer: Option D. *An axial flow pump, or AFP, is a common type of pump that essentially consists of a propeller in a pipe. Compressors and pumps will transmit (5. Only one answer is correct for each question. Name the basic components required in hydraulic system. Common questions we get asked about air compressors with our replies. You can send your comments directly at [email protected] 5 °C temperature difference across the evaporator. Even with a higher initial cost, compressors that are high quality tend to be reliable, leading to less down time and maintenance costs. Discharge of a centrifugal pump is proportional to A. You can unsubscribe at any time. Rent and save from the world's largest eBookstore. Industrial refrigerant machine operators seem to be simple people within the production chain but essentially are very important. Exam 2011, Questions Sample/practice Exam 2012, Questions Lecture Notes, Lecture All Fluid Flow Lectures Sample/practice Exam 2015, Questions and Answers - Additional Fluid Flow Questions Sample/practice Exam 2015, Questions And Answers - Additional Fluid Flow Questions Summary - Complete - Revision Sheet for Thermodynamics Part of the Course. Question: Reciprocating air compressor draws 6 kg of air per minute at 25°C. Principles on which compressors work: A compressor is a mechanical device that increases the pressure of a gas by reducing its volume. 1 st stage piston relatively larger and 2 nd stage piston smaller in comparison, materials respectively aluminum and cast iron. asked by Joseph on May 30, 2011; Thermodynamic. Piston compressors can be found in two primary configurations; single-stage and two-stage. Inter stage cooler and after coolers were there. Name different types of reciprocating pumps?. Impeller diameter E. These objectives can only be achieved by understanding the characteristics, selection criteria, sealing arrangements, common problems, repair techniques as well as their preventive and predictive maintenance. Compressor Control 7. D) Oil slingers are only used with scroll compressors. Remove the compressor cylinder head and inspect for foreign matter on top of the piston. Learn faster with spaced repetition. 4 Common Questions About Air Compressors. Is This Answer. Difference between Centrifugal and Reciprocating Compressor This article lists a few of the differences between a centrifugal and reciprocating compressor. The design of a high-efficiency reciprocating compressor requires an understanding of the interactions between different phenomena occurring inside the compressor. Determine the work on the air in Btu/min and in hp. 250+ Gas Compressor Interview Questions and Answers, Question1: When working with pressurised cylinders, what conditions of associated storage have to be met? Question2: Is oxygen an inflammable gas? Question3: What is the main constituent of Natural Gas? Question4: What do the letters L. multiple choice questions in basic mechanical engineering on topic of Turbo machines for interview, entrance test and competitive examination freely available to download for pdf export. Hydraulic Machines Questions and Answers - Reciprocating Pumps « Prev. Paige_Escamilla. d)-start the compressor after a drop in the evaporator pressure. • Explain the difference between a hermetic compressor and a semi-hermetic compressor. The Company offers a range of compressed air solutions from oil-lubricated and oil-free rotary screw compressors, oil-lubricated and oil-free reciprocating compressors, and centrifugal compressors, to dryers, filters and downstream accessories. Determine the Work Your Air Compressor Will Do. Reciprocating/piston air compressor troubleshooting Through this website I have helped hundreds of people from all over the world with their compressor repair and troubleshooting questions. chandarasekar. Single - Acting compressor. We've gathered together the most common questions so you can get your preparation off to a flying start. Thermal engineering is the science of energy and it's transformation from one form to another form. If the flow of air through the compressor is perpendicular to its axis,then it is A. Compressors are intended to compress a substance in a gaseous state. / Test Your knowledge on Compressors - Online Quiz. The compressors are one of the most important parts of the refrigeration cycle. You may use a non-programmable scientific calculator and drawing/mathematical instruments. The reciprocating compressor is probably the most versatile of all the types and is only out performed by rotary types when large volumes at low pressures are required. In order to achieve the required pressure ratio, several compression stages may be required, in one or more casings. Advanced Refrigeration: Unit 48 or unit 49: Refrigeration and Air Conditioning Technology (PCI - RH) Commercial Air Management Review. Rotary screw air compressors last longer than reciprocating air compressors. We also enhance productivity through solutions created by Club Car®, the global leader in golf and utility vehicles. Gas LiquefactionAir Compression serviceRefrigerant compression serviceRefueling applications. Reciprocating/piston air compressor troubleshooting Through this website I have helped hundreds of people from all over the world with their compressor repair and troubleshooting questions. Mechanical Engineering MCQ questions and answers especially for the Mechanical Engineer and who preparing for GATE Exam. 2340L5-V 5hp 60 gal Two-Stage Compressor (230/1) Designed for Heavy Shop and Industrial Use Delivering 175 psi maximum operating pressure, this 5 horsepower air compressor is designed to meet the demanding needs of automotive service and body shops, fleet maintenance, machine shops, production and manufacturing lines, woodworking shops, dry. HVAC practice exams can be used for professional-growth and to prepare for certification exams. The practice portal is online and is accessible all over the world. marked on a cylinder stand for? Question5: What are the two main constituents of L. two-stage reciprocating compressors offer you more choices of compressor sizes and compressor features to suit your needs. Ingersoll Rand provides products, services and solutions that enhance our customers' energy efficiency, productivity and operations. This device uncovers part of the rotor and proportionately reduces capacity of the machine down to. Compressors are intended to compress a substance in a gaseous state. Problem #9. The cylinder is connected to suction and delivery tube each of which provide with a non return valve called suction valve and delivery valve. Ideal Polytropic Index For Reciprocating Air Compressor? - posted in Industrial Professionals: Hi, Ive been looking at single stage reciprocating air compressor calculations and Im stumped by a problem. Centrifugal compressor. The increase in the specific internal energy is 33. An air compressor is a mechanical device which utilizes energy to compress air. tutorial is mainly about reciprocating compressors. Time has elapsed. There are various types of compressors used in the refrigeration and air conditioning machines, these are: reciprocating, rotary, screw, centrifugal and scroll. net 11 37 C The reading on the micrometer scale shown in figure "B" in the. In a single stage, single acting reciprocating air compressor, without clearance volume, the work done is maximum during. 1007 views 1 answers 0 votes. • Describe the various working parts of reciprocating and rotary compressors. Rotary screw compressors can be run at lower temperatures for 24 hours per day, 365 days a year. Reciprocating/piston air compressor troubleshooting Through this website I have helped hundreds of people from all over the world with their compressor repair and troubleshooting questions. Diagramed in Figure 6. The best type of reciprocating air compressor oil and appropriate oil viscosity to use for lubrication depends on factors such as the type of gas that is being compressed and the desired discharge pressure. answers, with four alternative answers to each question. Some questions come up time and time again — usually about you, your experience and the job itself. sullair 185 builds pressure,but doesn't have much volume. Calculate the indicated power required for a free air delivery of 0. In all the household refrigerators, deep freezers, window air conditioners, split air conditioners, most of the packaged air conditioners, the hermetically sealed reciprocating compressor is used. answers, with four alternative answers to each question. Content : Syllabus, Question Banks, Books, Lecture Notes, Important Part A 2 Marks Questions and Important Part B 16 Mark Questions, Previous Years Question Papers Collections. The best type of reciprocating air compressor oil and appropriate oil viscosity to use for lubrication depends on factors such as the type of gas that is being compressed and the desired discharge pressure. Learn faster with spaced repetition. The type of refrigerant that your air conditioner needs may also cause you problems down the road. ppt), PDF File (. We covered the topics of compressor questions interview and answers 2019, compressor basics, compressor theory. the valve plate is manufactured of inferior materials. To minimize the work of compression. sullair 185 builds pressure,but doesn't have much volume. Answer Explanation. Share your thoughts after watching this video. Welcome to Centrifugal Compressor Online Quiz-Part 1!!! Compressors are used to increase the pressure of a compressible fluid (gas or vapour). A type of reciprocating/positive displacement compressor in which the gas is compressed using a piston cylinder that is connected to a crankshaft. Centrifugal compressor. They are often some of the most critical and expensive systems at a production facility, and deserve special attention. Idle RPM and mixture, static RPM, propeller pitch change operation,and magneto check. abrasion by dust and dirt Tricky Question Answer will be anyone of them But You Have to Choose the Most Appropriate 4. Terms in this set (17) The evaporator of a chiller can be used to absorb heat from. b) engine attaches to the shock mounts at the engine's center of gravity. Refrigeration & Air-Conditioning Objective Questions With Answers - Set 01 Practice Test: Question Set - 01 1. Reciprocating Compressors The reciprocating air compressor, illustrated in Figure 1, is. Are fully closed. Rotary screw compressors can be run at lower temperatures for 24 hours per day, 365 days a. No explanation is available for this. A type of reciprocating/positive displacement compressor in which the gas is compressed using a piston cylinder that is connected to a crankshaft. We would like to contact you with any additional information you may need as well as answer questions you may have. The reciprocating compressor testing article provides information about reciprocating compressor mechanical running test, aerodynamic testing, hydrostatic testing, gas leakage test, bar-over test and vibration analysis and testing. sullair 185 builds pressure,but doesn't have much volume. Thermal Engineering Questions paper with Answers. What are the safety devices in air compressors on ships ? Bursting discs are fitted on the cooler shells (At water side). With power to run 1-inch impact wrenches combined with generators, welders or jump starters in the field or on the job site, this is what you need when you need to get the job done. Gas LiquefactionAir Compression serviceRefrigerant compression serviceRefueling applications. Refrigeration Basics Quiz Questions 3: HVAC Basics. So my test is today and I'm not sure about a number of questions that I have on my practice test. It reduces compressor capacity. 1 st stage piston relatively larger and 2 nd stage piston smaller in comparison, materials respectively aluminum and cast iron. Name the basic components required in hydraulic system. A reciprocating compressor is a positive-displacement machine that uses a piston to compress a gas and deliver it at high pressure. Also, the com-pressor capacity is directly proportional to the speed. reciprocating in the liner There is two valves first one inlet valve second one is Answer / u. 1 vs 2 vs 3 stage compressor. Answer: C - While initial price may play a part in a compressor purchase, operators should always look at the reliability, quality and energy efficiency of a machine. Hydraulic Components | Interview Question and Answers Hydraulic Components - Hydraulic and Pneumatic| Interview, viva ,oral Question and Answers 1. Calculate the exhaust temperature and the power output. 1 vs 2 vs 3 stage compressor. Reciprocating Compressors. No explanation is available for this question! 3) Which of the following is NOT a type of positive displacement pumps? a. Centrifugal pump. Troubleshooting Compressor Problems Compressor Types and Applications Compressors are classified as either "positive displacement," where intermittent flow is provided, or "dynamic," which provides continuous flow of the air or gas being compressed. This depends on the type of compressor you purchase. In a load/unload control scheme, the compressor remains continuously powered. 304 lb/cu ft. a refrigerator compressor is made up of two shells-- the upper one and the lower one. 746 kW/bhp, the approximate efficiencies are obtained. 6 4 Questions & )iscussions 2 1 22. Which of the following is used for testing the leaks in the entire refrigeration circuit before it can be charged with refrigerant: Dry Nitrogen gas. Compressor Combination Packages Industrial Duty air compressors for maintenance trucks, service fleets or technicians that need to save space and weight. Some questions are easier than others. The other types are covered briefly. So my test is today and I'm not sure about a number of questions that I have on my practice test. Prime Movers, Pumps, and Compressors Topics 1.
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