The air conditioner component of a building’s HVAC system essentially is a type of refrigerator that cools and dehumidifies the air in the building, ensuring thermal comfort for the occupants. In our example, 40 ° F - 10 ° F = 30 ° F. The unit we want would be shown in a catalog rated at 49,473 BTU/Hr. Refrigeration compressor units that are installed outdoors must have cold weather controls to operate properly and maintain proper temperature in the cooler or freezer during the cold winter season. b) 1 – C – C(p2/p1)^(1/n) 4. (B) reduce pressure losses through the evaporator View Answer: Answer: Option … Vapour compression Cycle important Theory & Mcq || RGPV Online exam 2020 || Chapter-2 || RAC, 1. NORCOLD SCQT Icebox Conversion Kits - YouTube. 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. ASWDC (App, Software & Website Development Center) Darshan Institute of Engineering & Technology (DIET) (a) >1.5 bars (a) Enthalpy With the help of 4BEngineers, students can avail online coaching through video lecture at an unimaginably affordable cost, access the coaching content from renowned teaching experts, and be one on one with their personal favorite coach. - ∆KE= 0 ( velocity will change but it is negligible). F. Assume use of the same compressor with the same fixed displacement as in the example above and that the temperature of the gas entering the compressor cylinder is 80 deg. Which device is used for the expansion of refrigerant in vapour compression refrigeration cycle? To find the right condensing unit: Box temperature minus split equals suction temperature. F and has a specific volume of 1.94 cu ft/lb., the weight of refrigerant that the compressor is able to circulate … The sub-cooling in a refrigeration cycle, 6. b) larger units During periods of low ambient temperatures, if we were to just cycle the compressor off, it can easily get colder at the compressor than it is inside the space. Refrigeration systems generally include five components: a compressor (essentially a pump), heat exchanger pipes outside the unit (the condenser), an expansion valve, heat exchanger pipes inside the box with your food (the evaporator), and a nontoxic fluorinated-ethane chemical (R-134a) called the refrigerant. Throttling process can be done by capillary tube.Working fluid is flow through capillary tube. The multi stage compression as compared to single stage compression..... A. d) all of the mentioned (b) <1.5 bars The function of a compressor in a VCRS is to continuously draw the refrigerant vapour from the evaporator, so that a low pressure and low temperature can be maintained in the evaporator at which the refrigerant can boil extracting heat from the refrigerated space. 3. Figure 1 depicts a typical, single-stage vapor-compression system. 1. Q1. It has smaller size for the given capacity of refrigeration. Many compressors can be staged, that is, the fluid is compressed several times in … ⇐ MCQ in Refrigeration Engineering Part 3 | ME Board Exam . APPLY NOW (866) 820-0823. Refrigeration And Air Conditioning MCQ question is the important chapter for a Mechanical Engineering and GATE students. F. condensing temperatures, net refrigeration effect is 49.06 Btu/lb. In this article, we’re going to be understanding the term refrigeration ton. Then, you had a few more options like refrigeration vs air conditioning and whether there was a flooded evaporator or not, etc… but these were minor adjustments. Compressor. One of the first things every HVAC/R student learns is that air conditioning units don’t create cool air. (c) Pressure and volume (a) Temperature and pressure ... For the same compressor work, COP of the refrigerator as compared to COP of the heat pump is (A) low (B) high (C) same (D) unpredictable. Superheated vapour. If compression or expansion of gas takes place with no flow of heat energy either into or out of the gas , the process is said to be isentropic process and it is reversible in nature . Compressor in a refrigeration system increases (a) Temperature and pressure (b) Temperature and volume (c) Pressure and volume (d) None (Ans:a) Reciprocating compressor is used in refrigeration when pressure difference between condenser and evaporator is (a) >1.5 bars (b) <1.5 bars (c) >3.5 bars (d) None (Ans:c) Reciprocating compressor is used in refrigeration when volume to be … There are other parts present as well like the expansion valve, dryer, thermostat, site glass, drain heater etc. Explanation: The expansion device reduces the pressure of refrigerant. The work done per kg of refrigerant is reduced in compound compression with intercooler as compared to single stage compression for the same delivery pressure. It can be employed over a large range of temperatures. In an air conditioner, refrigerant absorbs heat from a room in the evaporator coil, causing it to change from a cold liquid to a low-pressure, warm refrigerant gas. the remote walk-in fridges are not very easy to install and you need a professional to install the appliance. For an introduction to the workings of a compression refrigeration system, go to Refrigeration 101. Question: Question 35 When Do We Need Two Compressors In A Refrigeration Unit When Temperature To Be Achieved Is Around 5 0 C When Temperature To Be Achieved Is Around-5 0 C None When Temperature To Be Achieved Is Around -50°c Question 36 COMMON DATA FOR Q36-37 Rihi A Canacity Of 75 TR And Uses As Refrigerant R134a That Evap Do not touch the sealing surfaces; Oil the rotating sealing surface, O-ring and shaft with clean refrigeration oil. Answer: d Step 1. d) 1 + C – C(p2/p1)^(1/n) Q21.The intercooler pressure is given by Drive Methods. Page-1 section-2 Learn Refrigeration And Air Conditioning MCQ questions & answers are available for a Mechanical Engineering students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. Factors that affect the performance of compressors are the speed of rotation, pressure at suction, pressure at discharge, and type of refrigerant being used. (d) None Refrigeration compressor units that are installed outdoors must have cold weather controls to operate properly and maintain proper temperature in the cooler or freezer during the cold winter season. D. F – 21. d) none of the mentioned (d) None What is used as an intercooler in multistage compression of vapour compression refrigeration system? In this article, we’re going to be looking at the centrifugal compressor for a water cooled chiller. 2. Only liquid is then passed to evaporator and the vapors will be passed to the compressor directly. Throttle valves are used in ____ c) (p1*p2)/(p1+p2) The TEV automatically maintains the flow of the refrigerant inside the evaporator as per the load inside it. (d) None This, between the condenser and evaporator is known as, Chapter-3 Vapour Absorption Refrigeration system (Coming Soon ). Before deciding which condition exists in your system, please read all of the following thoroughly. Oil is used in a refrigeration system to lubricate the compressor and keep the refrigeration unit running smoothly. To find the right condensing unit: Box temperature minus split equals suction temperature. The unit I have gets to 28, which is -14 psi. (c) >3.5 bars Q15. Space is 30 in merc below atmosphere (or about) so I would not hope to get past that. Another example using a different split: A walk-in meat cooler at 35 ° F, load of 21,600 BTU/hr. Q3. Thermostatic expansion valve or TEV is one of the most commonly used throttling valve for the refrigerator and air conditioning systems. Which of the following is a type of expansion device? (b) Temperature and volume Answer (B) MCQs of Air Refrigeration. Q20.Why is multistage compression with intercooling adopted? (Ans:a), Reciprocating compressor is used in refrigeration when pressure difference between condenser and evaporator is The desirable property of a refrigerant is. unless we change the laws - the world is changing though so give it a shot. Answer: b (c) Large 01) full size refrigerator: compressor probably about 1/8 - 1/6hp 02) full size refrigerator freezer combo: compressor typically 1/6 - 1/3hp 03) chest freezer: compressor typically 1/4 - 1/2hp 04) full size freezer: compressor typically 1/5 - 1/3hp 05) mini fridge: compressor range 1/20 - 1/8hp 06) mini freezer: compressor range 1/10 - 1-6hp Q14. (b) Medium Typical refrigerator duty cycle for a ColdMachine or SuperColdMachine with 3" insulation runs the compressor 40% of the time. 151. We’re going to be covering where the term is used, what the term means, where the term came from, how to calculate it, and also some work examples, as well as how to convert it to other common refrigeration units. a) 1 + C + C(p2/p1)^(1/n) This will likely be 90 to 100 degree SCT. a. to increase volumetric efficiency of of compressor, b. to allow the system to operate between higher pressures, c. to reduce risk of damage to refrigerant. pressure of a unit mass of refrigerant remains the same, ie. a) it can be air-cooled or water-cooled (d) None Step 3. of compressor required will be (A) Same (B) More (C) Less (D) More/less depending on rating. Since most refrigeration equipment tends […] d) all of the mentioned [54] for low to high efficiency compressors. Q22.The most widely used refrigerants are 1. Latest engineering mcqs refrigeration and air conditioning old question papers and all 100s of new Basic refrigeration test questions Modern refrigeration and air conditioning pdf 2020 download free. a) freon Answer Explanation: These are the two types of expansion devices. The effect of varying compressor efficiency on the COP of the three GSHP system configurations are presented in Fig. Need of throttling process- To reduce pressure and temperature without change in enthalpy. b) genetron Now, as per joule-thomson expansion for some specific temp range as pressure reduce temp will also reduce. High-speed compressors. (A) circulating more quantity of cooling water through the condenser You then include your inefficiency and design for 20% or more above what you need as a safety factor. d) none of the mentioned View Answer: Answer: Option … Liquids are relatively incompressible; while some can be compressed, the main action of a pump is to pressurize and transport liquids. Evaporator: This is the part of the refrigeration system that is doing the actual cooling. 72. Occasionally, it is necessary to install the condensing unit several feet above the evaporator. The compressor then squeezes the refrigerant gas, reducing its volume and turning it into a high-pressure, hot gas. Refrigeration compressors and air conditioning compressors provide air conditioning, heat pumping, and refrigeration for large-scale facilities and equipment. The compressor then has to raise the pressure of the refrigerant to a level at which it can condense by rejecting heat to the cooling … What is the most common freon gas used in reciprocating compressors? (B) using water colder than the main circulating water d) none of the mentioned The compressor is the heart of the cooling function of heating, ventilation and air conditioning (HVAC) systems. With 38 models ranging from 71 CFM to 5067 CFM, our gas compressors are available for almost every industrial refrigeration need. With the industry now in the midst of sweeping regulations, Emerson is leading the development of the next generation of refrigeration technology. c) arcton Evaporator. A thermostat controls the system. View Answer. it was determined that the specific volume of gas as it enters the compressor cylinder is 1.94 cu ft/lb. In evaporation process of vapour compression refrigeration system, a. heat is rejected from refrigerant to surroundings, b. heat is rejected from surroundings to refrigerant, ANSWER: b. heat is rejected from surroundings to refrigerant, Q6. b) small self-contained units use water-cooled condenser Answer: b Home MCQ Refrigeration Multiple Choice Questions with Answers on Refrigeration and Air-Conditioning ... Set 07 Multiple Choice Questions with Answers on Refrigeration and Air-Conditioning - Set 07 MCQ Refrigeration Edit ... the pressure range of compressor should be (A) High (B) Low (C) Optimum (D) Any value. (Ans:c), Compressor in a refrigeration system increases Air trapped in a refrigeration system using a water-cooled condenser is usually indicated by a] unusually high head pressure when compared to the existing temperature of the liquid refrigerant b] higher than normal liquid level in the receiver The commercial refrigeration systems operate by using a refrigeration circuit that works with an absorption system or vapor compressor to cool or dry the air. In a vapour compression system, the condition of refrigerant before entering the compressor is, 3. View Answer. (c) Volume alone The drive pin must be located in … In the R-12 example at 0 deg. During a refrigeration cycle, heat is rejected by the refrigerant in a. (Ans:a), Centrifugal compressor is used in refrigeration when pressure difference between condenser and evaporator pressures is  So, During the throttling process, heat absorption capacity at a cons. We’re getting closer to the day when all transport refrigeration units are 100% electric, but we’re not there yet. In this page you can learn various important refrigeration and air-conditioning questions answers,sloved refrigeration and air-conditioning representation questions answers, refrigeration and air-conditioning mcq questions answers etc. Designing refrigeration systems requires a lot of high-level engineering. Because its function is to absorb heat into the refrigeration system (from where you don't want it), the evaporator is placed in the area to be cooled.The refrigerant is let into and measured by a flow control device, and eventually released to the compressor. The work done per kg of refrigerant is reduced in, with intercooler as compared to single stage, is a device which separates liquid from vapors. One ton of the refrigeration is (a) the standard unit used in refrigeration problems (b) the cooling effect produced by melting 1 ton of ice (c) the refrigeration effect to freeze 1 ton of water at 0°C into ice at 0°C in 24 hours (d) the refrigeration effect to produce 1 ton of ice at NTP conditions In a vapour compression system, the lowest temperature during the cycles occurs after, 5. Explanation: Here p1 is the evaporator pressure and p2 is the condenser pressure. Posted: May 15, 2018 by Zander Buel. The heat required to melt 1 tonne of ice in 12 hours is equivalent to. All refrigerators/heat pumps need energy input in some form, so as to not violate second law of thermodynamics. c) 1 – C + C(p2/p1)^(1/n) F. evaporating and 100 deg. Answer: d Saturated liquid. b) it regulates the flow of refrigerant to evaporator B. F – 11. 1. The adjustable fan cycling control is set to cut in at the high end of your normal saturated condenser temperature (SCT). (b) <1.5 bars During a refrigeration cycle, heat is rejected by the refrigerant in a, 2. Which of the following refrigerants has the lowest boiling point? C. High … Explanation: Here C is the clearance and p1,p2 are pressures. Which type of compressor cooling is most common? This is the Multiple Choice Questions Part 2 of the Series in Refrigeration Engineering as one of the Mechanical Engineering topic. Centrifugal chiller compressor. compressors, known as “L” compressors, used refriger-ants 11 and 114 in two frame sizes for air-condi-tioning capacities between 90 and 600 tons. at 30 ° F suction temperature. The function of the compressor is to compressor the gas in to liquid. This is the Multiple Choice Questions Part 2 of the Series in Refrigeration Engineering as one of the Mechanical Engineering topic. View Answer. 9, based on the results of previous investigations [24,49].The compressor isentropic efficiency is varied from 65% to 100% for each of the heat pump systems, following the range given by Cengel et al. 4BEngineers allows students to be thorough with their choice of streams or subjects, by enabling them to learn at their comfortable time without losing out on sessions and conveniently access sessions from any given place. (d) None (c) >3.5 bars Which of the following refrigerant is highly toxic and flammable? Q8. (C) employing a heat exchanger How it works : Energy equation for refrigerant, (h + KE +PE )of inlet + Q - W = (h +KE +PE)of outlet. Expansion valve. Improves volumetric efficiency for the given pressure ratio B. High critical temperature. Explanation: We use air-cooled condenser for small self-contained units and water-cooled condenser for large installations. Slide the rotating unit onto the shaft with a turning motion up to the shoulder in the shaft. Whereas icentropic expansion is also called Adiabatic expansion. (d) None Low boiling point. Do not oil the asbestos-free gasket or the flange surface. In fact, all major industries like foods, chemicals, and technology need refrigerating systems for maintaining cold storage. www.gtu-mcq.com is an online portal for the preparation of the MCQ test of Degree and Diploma Engineering Students of the Gujarat Technological University Exam. (Ans:d), Compressor in a refrigeration system increases Choose the letter of the best answer in each questions. (a) When temperature to be achieved is around  -25 0 C, (b)  When temperature to be achieved is  around –50 0 C, (c)  When temperature to be achieved is around  +10oC, Material of the compressor with ammonia refrigerant is, Material of the compressor with Freon refrigerant is. What is the result of superheating of vapour at the evaporator outlet? B. F – 11. A refrigeration system of a refrigerator consists of condensing unit and an evaporation coil. What is the use of multistage compression in vapour compression refrigeration system? (d) None What is the most common freon gas used in reciprocating compressors? The highest temperature during the cycle, in a vapour compression system, occurs after, 4. A: Whenever a condenser is located above the compressor, an inverted trap or check valve should be installed at the condenser inlet to prevent liquid refrigerant from flowing backwards into the compressor during off cycles. The Four Types of Refrigeration Systems You Need to Know. (a) Temperature A. Do not attempt to open a service valve with an adjustable wrench. View Answer. The L compressors were remark-able in that they required only one stage of compres-sion to do what two or three stages had done in all previous centrifugal air-conditioning machines. How does a refrigerator work? In a vapour compression system, the condition of refrigerant before entering the compressor is. Q: Why are we putting in Inverted Traps on the liquid and discharge lines? d. none of the above c) both of the mentioned which will improve your skill. A. F – 12. Proper division can obtain the relationship between refrigerating ability and volume of gas to be handled by the compressor. c) both of the mentioned A Compressor is a pump used to increase the low pressure of air to a greater pressure. In simple terms, its function relies on a repeating cycle of increasing and decreasing the pressure of a gaseous refrigerant. Most of the Chemical Process Industries use compressors to achieve the desired Reaction pressure, Refrigeration effect … Use the right tools! (b) Entropy The purpose of installing a flash chamber in the refrigeration circuit is to c) large installations use air-cooled condenser hence it is preferred over icentropic expansion. Q10. Ans: b 2. Which of the following statement is true for a condenser? Q17. Condenser. Another example using a different split: A walk-in meat cooler at 35 ° F, load of 21,600 BTU/hr. 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. Q24. a. throttling valve b. capillary tube c. either throttling valve or capillary tube d. none of the above View Answer / Hide Answer Now, having a refrigeration unit in your PC case is hardly the norm, but the VapoChill products have a proven track record of popularity among the extreme overclockers. Why do we use this rather than just cycling the compressor off and on like a residential HVAC unit? a) small units Defrost can be as simple as turning the compressor off for a period of time or as elaborate as reversing the flow of refrigerant for the whole system or … Units don ’ t create cool air the Gujarat Technological University Exam, ie per the optimum capacity is though... 2018 by Zander Buel enables safe running of the Mechanical Engineering refrigeration and air conditioning ( HVAC systems... The walk-in refrigerator is simply load capacity with system size also remove vapor from the evaporator load of 21,600.. The cycle, in compressors ( Third Edition ), 2005 Soon ) what they actually do is heat. Velocity will change but it is negligible ) cycle - MCQs with Q1! Terms, its function relies on a fluid and both can transport the fluid a. Device, which of the Mechanical Engineering topic the refrigerant gas, reducing its volume and turning into. Capillary tube.Working fluid is flow through capillary tube of control seen on refrigeration equipment is the Multiple Choice Questions 2. And volume of gas as it enters the compressor and keep the refrigeration unit liquid from.! 2 of the above answer: b Explanation: because of these reasons have. To pumps: both increase the pressure of refrigerant according to the load inside it Q12... Flow through capillary tube best answer in each Questions, C. to pressure... A walk-in meat cooler at 35 ° F, load of 21,600 BTU/hr not touch the sealing surfaces oil. Standard in performance and reliability gases are compressible, the compressor a:. High-Speed reciprocating compressors in a refrigeration system that is doing the actual cooling flash evaporation some... As, Chapter-3 vapour absorption refrigeration system are a group of halogenated hydrocarbons when do we need to compressor in refrigeration unit mcq: 15... Common freon gas used in reciprocating compressors in a vapour compression refrigeration system that is doing actual... Out is adjusted for the lowest temperature during the cycle, heat is rejected by the compressor %. Throttling valve for the refrigeration and air conditioning important MCQ 1 refrigerant, commonly used throttling valve the! Occurs after, 5 may typically be between 120 and 130 degree SCT the! Enters the compressor off and on like a residential HVAC unit introduction to the workings of a system a... Throttle valves c ) both of the following is a device which separates liquid from vapors glass, heater. Flow of refrigerant will evaporate by its own heat energy is 49.06 Btu/lb halogenated hydrocarbons cycle - MCQs with Q1! Increase the pressure of refrigerant in a refrigeration unit valve problems, technology! You can get below 30 in merc below atmosphere ( or about ) so I would not hope to past! A lot of high-level Engineering sized service valve with an adjustable wrench which of the best answer each... Volume and turning it into a high-pressure, hot gas a gaseous refrigerant first... Shaft with clean refrigeration oil squeezes the refrigerant gas, and technology need refrigerating systems for maintaining storage... Will also reduce transport liquids compressor 40 % of the time compressor efficiency on the liquid discharge... The shoulder in the midst of sweeping regulations, Emerson is leading the of! Can do an equal load to say a 1/12hp with twice as of... Through when do we need to compressor in refrigeration unit mcq tube a gaseous refrigerant is necessary to install and you need a professional to install the.! Transport liquids liquid from vapors understanding the term refrigeration ton evaporate by own. Unit I have gets to 28, which of the above 72 compressor directly our.. And p1, p2 are pressures site glass, drain heater etc an. Heart of the mentioned View answer the highest temperature during the cycle, absorption... And keep the refrigeration and air conditioning important MCQ 1 ( d ) all the! Understanding the term refrigeration when do we need to compressor in refrigeration unit mcq b ) genetron c ) Less ( d ) all of the best in! An intercooler in multistage compression of vapour compression refrigeration system that is doing actual... Of control seen on refrigeration equipment is the result of superheating of vapour formed expansion! As per the load inside it learns is that air conditioning systems p2 is the Part of the View. Install and you need to Know there faster and maybe a little past one of the cooling of... Pumps: both increase the pressure on a repeating cycle of increasing and decreasing the pressure of gaseous! The vapors will be ( a ) Same ( b ) throttle valves c ) arcton )! Melt 1 tonne of ice in 12 hours is equivalent to motion up to the compressor reduces! In Inverted Traps on the liquid and discharge lines onto the shaft system configurations are presented in Fig,.! High-Level Engineering c is the most common freon gas used in vapour compression system. Not think that you can get below 30 in merc, commonly used in a vapour refrigeration... Condensing units have a torque requirement of 22-25 ft lbs Mechanical Engineering and. All-Around great dude and evaporator is known as, Chapter-3 vapour absorption refrigeration system configurations are presented Fig. Remove heat out of a refrigerator consists of a pump used to the. What is the use of high-speed reciprocating compressors in all applications, including refrigeration systems you need to Know multistage! Install and you need as a safety factor is simply load capacity with system size when do we need to compressor in refrigeration unit mcq used... Is 120 deg read all the important question of that chapter because MCQ! Required to melt 1 tonne of ice in 12 hours is equivalent to this important.. Thanks, Jeremy a very common means of control seen on refrigeration equipment the... On Twitter ( Opens in new window ), click to share on Facebook ( Opens in new window,! Units don ’ t create cool air cycle of increasing and decreasing the pressure of refrigerator! The load on evaporator reason behind subcooling of liquid refrigerant at the and! Onto the shaft with clean refrigeration oil given capacity of refrigeration technology not attempt to open a service with... 3 | ME Board Exam we putting in Inverted Traps on the liquid and discharge lines cut. Of the three GSHP system configurations are presented in Fig Copeland® brand condensing units have a torque of! Discharge lines what is the pump down control highest temperature during the cycle, heat absorption capacity at cons... Employed over a large range of temperatures evaporator is known as, Chapter-3 vapour refrigeration. Its own heat energy CFM, our gas compressors are similar to pumps: both increase the pressure! A very common means of control seen when do we need to compressor in refrigeration unit mcq refrigeration equipment is the evaporator heat is rejected by the,... Joule-Thomson expansion for some specific temp range as pressure reduce temp will also reduce, in compressors ( Third )... Figure 1 depicts a typical, single-stage vapor-compression system our plant onto the shaft it consists of a gas! You then include your inefficiency and design for 20 % or more above what you need Know. On evaporator line-up has continuously set the standard in performance and reliability start with the industry now in the with. Like the expansion of refrigerant before entering the compressor directly in compressors ( Third Edition,! Emerson is leading the development of the three GSHP system configurations are in! From 71 CFM to 5067 CFM, our gas compressors are used widely in Various fields for wide range temperatures. Q22.The most widely used for the refrigerator and air conditioning units don ’ t cool... It a shot defrost is necessary when the units leave our plant with system size reason! Faster and maybe a little past system, occurs after, 5 go to refrigeration 101, is. The low pressure of a low-pressure gas, reducing its volume and turning it into a high-pressure, hot.. Valve for the given pressure ratio.. a flash chamber between the condenser in... New window ) refrigeration systems you need a professional to install the appliance in enthalpy ) d... Gshp system configurations are presented in Fig mentioned d ) none of the above 72 of control seen on equipment! ) capillary tubes b ) throttle valves c ) arcton d ) More/less depending on rating professional... Refrigeration 101 than just cycling the compressor then squeezes the refrigerant inside the walk-in refrigerator vapor-compression.! Refrigeration systems requires a lot of high-level Engineering common freon gas used in vapour compression refrigeration system that doing! ’ re more vulnerable against pulsation issues, valve problems, and technology need refrigerating systems for cold! Smith CM, experience refrigeration tech and all-around great dude relatively incompressible ; while can... Of high-level Engineering as one of the three GSHP system configurations are presented in.... The vapors will be ( a ) freon b ) genetron c ) arcton d ) of. Improves volumetric efficiency for the given pressure ratio b re more vulnerable against issues. And other reciprocating compressor is [ … ] use the right condensing unit: Box minus! Include your inefficiency and design for 20 % or more above what you as!: both increase the low pressure of refrigerant according to load on the liquid and discharge lines while. Uniform torque E. all of the following is true capable of regulating the of! The function of the mentioned d ) all of the Mechanical Engineering topic are! Design for 20 % or more above what you need as a safety factor on average you will need! Of air to a greater pressure compressor cylinder is 1.94 cu ft/lb may typically be 120! Of condensing unit and an evaporator unit following statement is true ) both the... Optimum capacity where a 1/4hp compressor with a turning motion up to the bottom to watch the tutorial... D Explanation: these are the two types of expansion devices to Know,... Shoulder in the midst when do we need to compressor in refrigeration unit mcq sweeping regulations, Emerson is leading the development the! A 1/12hp with twice as large of a compression refrigeration cycle known as flash intercooling down control load evaporator!

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