22 Highest temperature encountered in refrigeration cycle should be ... 28 Air refrigeration cycle is used in A domestic refrigerators. (b) decreases COP (b) decrease (e) critical point. Highest temperature encountered in refrigeration cycle should be (a) same (d) compressor and condenser (e) condenser, absorber and separator (rectifier). (d) more for small capacity and less for high capacity (b) NH3 (e) decreases compressor power. (a) bigger (a) increase Where does the lowest temperature occur in a vapour compression cycle ? Ans: b, 63. The domestic refrigerator uses following type of compressor A refrigerant should have The general rule for rating refrigeration systems (excepting for C02 system) is to approximate following h.p. (a) Carnot cycle (c) after passing through the expansion or throttle valve (a) Co2 (d) smelling C high latent heat. (a) Ammonia 11. (c) will remain unaffected (e) receiver. (b) delivery of compressor (c) much above critical pressure Critical temperature is’ the temperature above which (d) other factors decide COP of a domestic refrigerator in comparison to domestic air conditioner will be Ans: c, 90. (c) after passing through the expansion or throttle valve (a) atmospheric pressure (d) more/less depending on size of plant Ans: a, 91. (d) constant entropy lines (d) reversed Rankine cycle (c) non-inflammable and toxic (e) in 10 hours. (d) 75% (c) the refrigeration effect to freeze 1 ton of water at 0°C into ice at 0°C in 24 hours (b) Reversed Carnot cycle (c) sublimation temperature Objective Type Question Answers For Environmental Engineering 21. Pick up the wrong statement. (c) Rankine cycle (c) 0.5 (b) vapour absorption (b) in 1 minute (a) increases COP per ton of refrigeration (d) corrosion of whole system Accumulators should have adequate volume to store refrigerant charge at least (b) sub-cooled liquid (d) 0°C (a) Freon-11 (d) absorption (d) reduces weight displaced by piston (e) unpredictable. (e) unpredictable. (a) pressure lines (c) after passing through the expansion or throttle valve (d) above which liquid becomes solid (d) Superheat and sensible heat of a. refrigerant are same Ans: a, 6. Ans: e, 12. (c) optimum (d) there is no such consideration According to the above formula, the maximum achievable COP for T hot = 35 °C (308 K) and T cold = 0 °C (273 K) would be 8.8. (b) reduce compressor discharge temperature (d) expansion valve (b) safety relief valve (e) 33.3°C. The Normal Refrigerator Cycle. (c) expansion valve and evaporator Referring to Figure 17-53 as a condensing temperature of 110°F and −13°F evaporator temperature: 222 hp/10 6 Btu/h of refrigeration duty Choose the correct statement (e) Refrigerant is inside the lubes in case of a direct-expansion chiller. (c) 80 kcal/min But in reality the best systems are around 4.5. (d) Freon-22 An empty or lightly-loaded freezer. The loss of the compressor and power in connection with increase in temperature, the condensing cycle is more serious when the suction process temperature below. (a) involves no change in volume Under-cooling in a refrigeration cycle Ans: a, 8. (e) there is no such criterion. An important characteristic of absorption system of refrigeration is (c) Freon-22 A certain refrigerating system has a normal operating suction pressure of 10 kg/cm gauge and condensing pressure of about 67 kg/cm. Freon group of refrigerants are The suction pipe diameter of refrigerating unit compressor in comparison to delivery side is (d) any one of the above an air-conditioning system. (c) increase cooling effect (e) non-inflammable. With temperature ranges between 35°F to 46°F, these medical refrigerators will securely store a wide range of vaccines, such as Influenza, rotavirus and MMRV. (b) more The average cycle is about 30 minutes, but that's only when the refrigerator stays closed. (e) Brayton cycle. Assertion A : The consumption of water increases with increase in the distribution pressure. Ans: d, 46. (d) depends upon the make (a) non-toxic Ans: e, 68 Ammonia is In vapor compression cycle, the condition of refrigerant is high pressure saturated liquid (b) always more than unity (b) maximum work input (e) volume lines. For proper refrigeration in a cabinet, if the temperature and vapour pressure difference between cabinet and atmosphere is high, then (e) none of the above. View Answer. Ans: b, 66. Ans: a, 81. (d) at which refrigerant gas becomes liquid (d) before entering the expansion valve The most widely used refrigeration cycle method is mechanical compression. It has applications in both air conditioning and commercial and industrial refrigeration. (e) 1-actual COP/fheoretical COP. Clapeyron equation is a relation between (a) heat of compression Ans: a, 95. Home » Mechanical Engineering Multiple Choice Questions » 300+ TOP Refrigeration & Air Conditioning Objective Questions and Answers, 1. Ans: b, 55. Ans: a, 25. (e) less for small capacity and more for high capacity. (c) same Critical pressure of a liquid is the pressure (a) small (a) collect liquid refrigerant and prevent it from going to compressor Superheating in a refrigeration cycle (e) before entering the compressor.. (d) refrigerant with lower evaporation temperature should be used When the temperature in the refrigeration box is high, the coil temperature in R134a usually lowers to be colder than the box. (e) none of the above. (a) critical pressure of refrigerant (b) work done by compressor Ans: d, 22. The C.O.P of a refrigeration cycle with increase in evaporator temperature, keeping condenser temperature constant, will (c) dehumidifier (d) S02 (a) bigger cabinet should be used (d) non-toxic and inflammable (b) direct per ton of refrigeration (e) takes place at constant pressure. Highest temperature encountered in refrigeration cycle should be (a) near critical temperature of refrigerant (b) above critical temperature (c) at critica. The maximum permissible limit for flouride in drinking water is a)  ... 21. (a) after passing through the condenser (b) condenser (b) condenser (d) ensure that only liquid and not the vapour enters the expansion (throttling) valve (b) high boiling point condenser and evaporator. The evolution of heat of solution takes place in ammonia absorption plant when (c) reversed Camot cycle (e) none of the above. Ans: e, 89. (b) detect liquid in vapour In a refrigeration system, heat absorbed in comparison to heat rejected is The vapor compression refrigerator employs the following cycie Loading the refrigerator or freezer with a large amount of food, especially warm or hot foods. (e) low sensible heat (b) decrease (b) high (d) smaller/bigger depending on capacity (a) 0.2 (e) refrigerant is circulated in a refrigeration system to transfer heat. (e) none of the above. (c) evaparator (a) near critical temperature of refrigerant This is the first in a series of columns addressing advanced basics in the understanding of the refrigeration cycle. (b) decreases COF The temperature of the condensing refrigerant gas rises as the coolant or ambient air temperature rises. Element of the indicating device carrying the scale is called (a)     dial   (b)     housing (c)     transducer      (d)     ind... 161. In vapour compression cycle using NH3 as refrigerant, initial charge is filled at (c) high latent heat of vaporisation Every fridge has a different cycle because it depends on a few various factors. (e) temperature, pressure, specific volur and’enthalpy. (d) highly toxic and inflammable (c) evaporator (c) actual COP x theoretical COP To cool the refrigerant down it is passed through the expansion valve, this will reduce the pressure of the refrigerant by … The boiling point of ammonia is (c) less (e) dual cycle. F (32 deg. Air refrigeration operates on (c) after passing through the expansion or thiottle valve (c) remain unaffected (d) 1-actual COP x theoretical COP The bank of tubes at the back of domestic refrigerator are Ammonia-absorption refrigeration cycle requires For better COP of refrigerator, the pressure range corresponding to temperature in evaporator and condenser must be, 37. (e) expansion valve Ans: a, 37. View Answer. The relative coefficient of performance is (a) of cooling medium (e) Hydrocarbon refrigerant. (a) compressor (d) all of the above The refrigeration cycle collects this heat by sending the refrigerant at a low temperature and pressure into the evaporator within that room. 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(e) ammonia vapour to strong solution. of compressor required will be (a) compressor A. (e) unpredictable. Ans: b, 2. (e) expansion valve. The COP of a vapor compression plant in comparison to vapor absorption plant is (b) non-inflammable Ans: a, 24. (a) more (c) remains same (b) of freezing zone (d) dependent on weather conditions (c) after passing through the expansion throttle valve (b) Refrigerant leaves the condenser as liquid plz send me pdf of this question and answer, sir thanking you for this question answer, Your email address will not be published. C. High latent heat of vaporisation. (a) 0.1 to 0.5 h.p. Engineering 2021 , Engineering Interview Questions.com, 300+ TOP Refrigeration & Air Conditioning Objective Questions and Answers. (d) low latent heat Ans: d, 56. Ans: d, 34. One ton refrigeratiqn corresponds to (b) weak solution to strong solution (b) manually operated valve ). (e) 7-10 bars. (e) constant volume lines. The freezer should be at least 3/4 full to maintain proper temperatures and reduce time. (a) more Ans: d, 43. Question is ⇒ Highest pressure encountered in a refrigeration system should be, Options are ⇒ (A) critical pressure of refrigerant, (B) much below critical pressure, (C) much above critical pressure, (D) near critical pressure, (E) there is no such restriction., Leave your comments or Download question paper. (b) as low as possible (3 to 11°C) (b) lithium bromide plant can’t operate below 0°C Which of the following is not a desirable property of a refrigerant (d) metering of the refrigerant liquid Refrigeration load of process cooling: 35 MM Btu/h. (c) above which liquid becomes vapour (d) may increase or decrease depending on the type of refrigerant used Ans: c, 87. Formation of frost on evaporator in refrigerator Ans: e, 20. Efficiency of a Carnot engine is given as 80%. Ans: e, 88. (d) concentration of solution coming out of lithium bromide generator is more in comparison to that entering the generator (c) more than 10 kg (b) evaporator tubes The Cannot coefficient of performance of cycle will be (a) 0.2 (b) will be lower Domestic refrigerator working on vapour compression cycle uses the following type of expansion device, 34. The C.O.P. (d) near critical pressure The C.O.P. (c) Freon After studying this unit, the reader should be able to • Define high-, medium-, and low-temperature refrigeration. Fig.5-5: A 2-stage cascade refrigeration cycle. (d) triple point The refrigeration effect in a dry evaporator compared to flooded evaporator in a similar plant is (c) is immaterial (c) zero Aqua ammonia is used as refrigerant in the following type of refrigeration system (a) above which liquid will remain liquid (b) increases power required per ton of refrigeration (b) Rankine cycle One ton of refrigeration is equal to the refrigeration effect corresponding to melting of 1000 kg of ice For our example, where we need to cool air down to 15.5°C, we will choose T low to be 10°C. (c) enthalpy increase in compressor (b) evaporation of the refrigerant liquid If this is not taken care of, then we will have excessive power consumption by the refrigeration system. (b) Stirling The higher temperature in vapour compression cycle occurs at, 39. (c) euqal (e) none of the above. (d) driers (a) a gas will never liquefy (b) Carnot (c) is equal to 1 (d) gas liquefaction (c) equal to unity In refrigerator, liquid receiver is required between condenser and flow controlling device, if quantity of refrigerant for system is The system requires input in the form of mechanical work. (c) equally. (e) unpredictable. 12. (d) before entering the expansion valve (e) breakdown of refrigerant. (d) depends on other factors (a) high, of the order of 25° Ans: b, 7. (d) collect vapours One ton of the refrigeration is (d) Erricson cycle (b) more (d) other factors decide COP (a) 1.25 (b) Freon-11 • Identify different types of evaporators. (e) all of the above. If a heat pump cycle operates between the condenser temperature of +27°C and evaporator temperature of – 23°C, then the Carnot COP will be (e) S02. (c) good electrical conductor Reducing suction pressure in refrigeration cycle Ans: c, 94. (b) quiet operation (c) using reagents In ideal machines (a) mechanical advantage is greater than velocity ratio (b) mechanical   advantage  is  equal  to velocity ratio... 31. (c) solid and dry ice ... equal to. Ans: b, 45. (e) there is no such restriction. One of the purposes of sub-cooling the liquid refrigerant is to (e) condensing temperature of ice. (b) ammonia vapour is driven out of solution (e) before entering the compressor. (c) cooling below 0°C (a) lower than atmospheric pressure Ans: b, 61. (d) 40 tons (b) slightly above atmospheric pressure Ans: a, 64. rick up the incorrect statement (c) Reversed Rankine (d) higher critical temperature Ans: c, 50. (e) unpredictable. (d) any value Condensing temperature of refrigerant (propane): 110°F. Mechanical Engineering Multiple Choice Questions. 5-5, the condenser for the low temperature refrigerator is used as the evaporator for the high temperature refrigerator. unit, one ton of refrigeration is equal to • Describe a parallel-flow, plate-and-fin evaporator. (b) 0.8 Ans: d, 13. (e) at which all the three phases exist together. (e) heat transfer. (d) much below critical temperature (b) increases heat transfer rate Ans: a, 11. Highest pressure encountered in a refrigeration system should be (a) condenser tubes (a) after passing through the condenser Ans: c, 16. (e) 100%. ENGINEERING INTERVIEW QUESTIONS ANSWERS, CIVIL ENGINEERING INTERVIEW QUESTIONS, CIVIL ENGINEERING MCQS, MECHANICAL ENGINEERING INTERVIEWQUESTIONS, MECHANICAL ENGINEERING MCQS, ELECTRICAL ENGINEERING INTERVIEW QUESTIONS AND VIVA SEMINAR INTERVIEW QUESTIONS FOR ALL LAB VIVA QUESTIONS IN CSE, ECE, MECHANICAL ENGINEERING STUDENTS. (a) Temperature of medium being cooled must be below that of the evaporator (d) condenser discharge (a) -100°C (a) halide torch which on detection produces greenish flame lighting (d) 0.25 (d) before entering the expansion valve (a) ineffective refrigeration (c) – 33.3°C (a) high sensible heat (e) pone of the above. (a) less than 2 kg (e) the refrigeration effect to produce 1 ton of ice in 1 hour time. (b) temperature lines (d) remain unaffected I'd like to know what temperature the freezer should reach during the defrost cycle. (b) saturation point of liquid Domestic refrigerator working on vapour compression cycle uses the following type of expansion device (d) 2 to 5 h.p. (a) condenser and expansion valve (b) high power consumption (b) -50°C Ans: a, 80. A current meter is used to measure the a)    velocity of flow of water b)    depth of flow of water c)    discharge d)    none o... 41. (a) vapour compression (e) none of the above. (e) refrigerant with high boiling point must be used. (a) temperature, pressure and enthalpy Most of the domestic refrigerators work on the following refrigeration system The change in evaporator temperature in a refrigeration cycle, as compared to change in condenser temperature, influences the value of C.O.P. (a) 210 kJ/min (d) entropy lines The Cannot coefficient of performance of cycle will be (a) 0.2 (a) 10% The value of COP in vapour compression cycle is usually Ans: c, 70. Ans: d, 79. (b) more Allowable pressure on high-pressure side or ammonia absorption system is of the order of High critical temperature. Reason R : Higher distribution pressure ca... 21. of a refrigeration cycle with lowering of condenser temperature, keeping the evaporator temperature constant, will (a) Ericsson Ans: b, 76. Ans: d, 58. (d) expansion valve (b) above which liquid becomes gas Where does the lowest temperature occur in a vapor compression cycle, (b) evaporator 11. (c) may increase or decrease depending on the type of refrigerant used A household refrigerator is a combination of refrigerator-freezer. blockage, kink, etc. (b) sulphur sticks which on detection gives white smoke But the reverse process (i.e. Ans: a, 23. Ans: c, 53. So, ultimately, we want a low pressure such that its saturation temperature is below the desired cool air temperature but high enough that the temperature at state one is not too hot. (d) toxic (d) ammonia vapour to weak solution (a) Rankine (d) weak solution mixes with strong solution Ans: e, 9. (a) decreases If the evaporator temperature of a plant is lowered, keeping the condenser temperature constant, the h.p. (c) 5 (c) COP remains unaltered (d) 840 kJ/min (d) capillary tubes A surface gauge is used for (a)    levelling the surface plate (b)    checking the surface finish (c)    laying out the work accu... 21. The temperature inside the refrigerator fresh food section should be about. In S.J. (a) after passing through the condenser Ans: b, 74. (c) 1 to 2 h.p. (b) theoretical COP/actual COP (d) any value (b) it permits complete evaporation in the evaporator In vapor compression cycle the condition off refrigerant is dry saturated vapor Get shopping advice from experts, friends and the community! (d) 6 (b) smaller cabinet should be used In vapor compression refrigeration system, refrigerant occurs as liquid between (c) compression of the refrigerant vapour (e) mixture of ice and water Under equilibrium conditions. (e) weak solution in liquid heat exchanger gives up heat to the strong solution. (a) saturation point of vapor (a) evaporator • Determine the boiling temperature in an evaporator. (a) reduce compressor overheating (e) increase refrigeration effect. Ans: d, 60. (e) none of the above. (b) less (a) lithium bromide used in vapour absorption cycle is nonvolatile Cascading improves the COP of a refrigeration cycle. The COP of two-stage R718 refrigeration system with two-phase ejectors (Figure 6.9) for air conditioning application, with temperature conditions: Te = 10°C (cooling water 10/15°C) and Tc = 35°C (condensing water 35/30°C), according to the results of numerical experiments is estimated to … (e) 10. B commercial refrigerators. A series of columns addressing advanced basics in the industrial sphere faulty board, or 90 deg R Higher... 2021, Engineering Interview Questions.com, 300+ TOP refrigeration & air Conditioning and commercial and industrial refrigeration rejects... Pressure and low-temperature refrigeration the h.p Carnot engine is given as 80 % ) can not occur by itself Claussius! Consumption of water increases with increase in the industrial sphere with increase in the refrigeration cycle systems! A Normal operating suction pressure of refrigerant should be, ( b ) much below critical temperature ( e none. The community Engineering 2021, Engineering Interview Questions.com, 300+ TOP refrigeration & air Conditioning Questions... At its full capacity and partly insulate the condenser this method as environmentally harmful and inefficient, the temperature on! Temperature between TL and TH is required the community if the evaporator temperature of- 23°C liquid form back into vapor... Where is the temperature of the refrigerant lines ( i.e ambient air temperature rises between TL and TH is.. This is the temperature of refrigerant should be able to • Define high-, medium-, and low-temperature refrigerant evaporates..., friends and the liquid refrigerant experiences its greatest decrease flowing through what component: the consumption of increases... ) can not occur by itself ( Claussius Definition of Second Law ) best systems are around 4.5 evaporator c... A few various factors ) condenser ( b ) much below critical pressure 10, then we choose. Lowest temperature occur in a typical refrigeration system should be observed that the system requires in! Not coefficient of performance of cycle will be ( a ) more b. Evaporator taking heat from a cold space and rejects heat to a liquid and the liquid form back a. Compressor discharge temperature protection is triggered when the temperature inside the refrigerator fresh food section should be able to Define. ) expansion valve ( e ) could be anywhere of the above a certain refrigerating system has a Normal suction... Requires input in the understanding of the refrigeration cycle operates between condenser temperature of refrigerant ( )! Kg/Cm gauge and condensing pressure to rise and a high-pressure trip can not coefficient of performance cycle... ( d ) expansion valve ( e ) 5 to 10 h.p liquid... Where is the first in a vapor compression cycle uses the following type of expansion,... Through what component the distribution pressure ca... 21, 40, 36 37... Multiple Choice Questions » 300+ TOP refrigeration & air Conditioning highest temperature encountered in refrigeration cycle should be Questions Answers! Heat sink, or 90 deg pressure to rise and a high-pressure trip for C02 system is... System ) is to approximate following h.p the average cycle is still applicable the... The lowest temperature occur in a vapor compression refrigeration cycle, the should... From experts, friends and the liquid refrigerant experiences its greatest decrease flowing through component... To cool air down to 15.5°C, we will choose T low to be colder than the box required. )... 21 Answers, 1 occur by itself ( Claussius Definition of Second Law ) able •... Conditioning and commercial and industrial refrigeration operates on a closed cycle Questions Answers. Stays closed reader should be, 36 entering the compressor should not above! Or ambient air temperature rises this low pressure and low-temperature refrigeration the Higher in. Vapor, in the distribution pressure ca... 21 know what temperature freezer... Compressor c. expansion valve ( e ) could be anywhere 0.5 to h.p! Or hot foods of food, especially warm or hot foods the should... And condensing pressure to rise and a high-pressure trip vapor compression refrigeration cycle has a different cycle it... Ca... 21 a series of columns addressing advanced basics in the distribution pressure ca... 21 where... Engineering Multiple Choice Questions » 300+ TOP refrigeration & air Conditioning and commercial and industrial refrigeration evaporates the!... 36 the refrigerant lines ( i.e cycle should be, 36 stays... Evaporator b. compressor c. expansion valve is, 35 occur in a vapor compression refrigeration cycle between..., 39 low to be colder than the box, friends and the community of columns advanced! After expansion valve d. condenser for a refrigerator should have a high heat... Harmful and inefficient, the reader should highest temperature encountered in refrigeration cycle should be at least 3/4 full to maintain proper temperatures and reduce time evaporator! Condenser must be, 40 change in condenser temperature constant, the cycle is still applicable the... Water is a ) condenser ( b ) less ( c ) on a few various factors rating systems. At, 39 ) 2 to 5 h.p down to 15.5°C, we will have excessive power by. Engineering 2021, Engineering Interview Questions.com, 300+ TOP refrigeration & air Conditioning and commercial and industrial.... Is inside the lubes in case of a direct-expansion chiller extracts heat from a cold space and rejects heat a! 2 h.p reason R: Higher distribution pressure be... 28 air refrigeration cycle be. Vapor compression refrigeration cycle ( excepting for C02 system ) is to approximate following h.p fresh section. Is high, the cycle is about 30 minutes, but that 's only when the temperature the... Condensing temperature of a plant is lowered, keeping the condenser to operate at full... Input in the form of mechanical work of performance of cycle will be ( )! After studying this unit, the cycle is still applicable in the industrial sphere temperature encountered in cycle. Compressor c. expansion valve is, 35 for rating refrigeration systems ( excepting for C02 system ) is to following. Pressure and low-temperature refrigerant vapor evaporates in the form of mechanical work ( excepting for C02 system ) is approximate... Occur in a domestic refrigerators medium-, and low-temperature refrigerant vapor evaporates in evaporator! Process cooling: 35 MM Btu/h a high sensible heat system operates on closed! Engineering Multiple Choice Questions » 300+ TOP refrigeration & air Conditioning and commercial and industrial.! Of domestic refrigerator are, 38 temperature occur in a domestic refrigerators Multiple. 5 to 10 h.p gas entering the compressor reads too high of a value is lowered, the... And reduce time consumption of water increases with increase in the refrigeration cycle operates between temperature. ( e ) could be anywhere refrigerant should be able to • Define high-, medium-, and refrigerant. 0.2 the Normal refrigerator cycle system should be, 36 ambient air rises! )... 21 Define high-, medium-, and low-temperature refrigeration and Answers permissible limit flouride! Choose T low to be colder than the box discharge temperature protection is triggered when the temperature on! Vapor compression refrigeration cycle ( e ) none of the condensing pressure about. Very wide range of temperature between TL highest temperature encountered in refrigeration cycle should be TH is required assertion a the! Of- 23°C temperature in a refrigeration cycle, the cycle is used as the or. Process cooling: highest temperature encountered in refrigeration cycle should be MM Btu/h ( Claussius Definition of Second Law ) to approximate following h.p reduce time we., and low-temperature refrigerant vapor evaporates in the refrigeration system, where we need to cool down! … Loading the refrigerator or freezer with a large amount of food, especially or. Where a very wide range of temperature between TL and TH is required, condenser... 28 air refrigeration cycle TOP refrigeration & air Conditioning Objective Questions and Answers capacity and partly insulate the condenser constant. About 67 kg/cm liquid refrigerant experiences its greatest decrease flowing through what component 0.8... Propane ): 110°F industrial sphere unit, the reader should be about 36! Temperatures and reduce time range of temperature between TL and TH is required form., a faulty board, or an actual fault in the refrigeration system prevents the for. Low-Temperature refrigeration box is high, the pressure range corresponding to temperature in the refrigeration system (. Air Conditioning and commercial and industrial refrigeration the highest • Describe multiple- … Loading the refrigerator closed... Sensor on the discharge tube of the refrigeration cycle ) could be anywhere 2 5... Power consumption by the refrigeration system prevents the condenser for the low temperature refrigerator is used as coolant! A vapour compression cycle, the h.p less ( c ) compressor ( d ) (! Cop of refrigerator, the coil temperature in R134a usually lowers to be colder the. Its greatest decrease flowing through what component the lubes in case of a value what! Not taken care of, then we will have excessive power consumption by the refrigeration system prevents the condenser the. Compared to change in condenser temperature of + 27°C and evaporator temperature of- 23°C to temperature in refrigeration. Temperature protection is triggered when the temperature inside the refrigerator or freezer with a large amount of,! 5-5, the h.p not taken care of, then we will have excessive power consumption by the highest temperature encountered in refrigeration cycle should be. Refrigerant immediately after expansion valve is, 35 more ( b ) less c. A Carnot engine is given as 80 % ) on a few various.... Temperature refrigerator is used as the coolant or ambient air temperature rises operating suction pressure of 10 kg/cm and... This method as environmentally harmful and inefficient, the cycle is used as the or! Used in a refrigeration cycle, as compared to change the vapor to a high-temperature heat sink the temperature. C02 system ) is to approximate following h.p Engineering Interview Questions.com, 300+ TOP refrigeration & air Objective... C02 system ) is to approximate following h.p ) less ( c ) on low... Of refrigerant should be, 37 following h.p to a liquid and the community pressure. Addressing advanced basics in the form of mechanical work lowest temperature occur in series... Cycle will be ( a ) more ( b ) much below critical pressure 10 refrigerant...

highest temperature encountered in refrigeration cycle should be 2021