Ans: b. Part 1: List for questions and answers of Refrigeration and Air Condi tioning. With a neat sketch, explain the working of room air conditioner. 5.8. Our compressors leverage thermal technology developed through years of experience to consistently provide high quality. 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. What is the value of the COP of the vapour compression refrigeration system? Under the MYCOM brand, Mayekawa’s compressors are used worldwide in industrial refrigeration and freezing, heat pumps, and gas markets. Refrigeration and Air Conditioning MCQ Questions 1-One ton of refrigeration is equal to (A) 21 KJ/min (B) 105 KJ/min (C) 210 KJ/min (D) 420 KJ/min 2-A low side float valve maintains the level of refrigerant in (A) Flooded evaporator (B) Evaporator (C) Condenser (D) Compressor 3-When wet bulb and dry bulb … The main components are shown in Fig. In a vapour compression system, the condition of refrigerant before entering the compressor is, 3. Throttling process can be done by capillary tube.Working fluid is flow through capillary tube. His 1856 patent was for a vapour-compression system using ether, alcohol, or ammonia. Adsorption refrigeration is regarded as because it can be driven by low-grade heat and use natural refrigerants. This, between the condenser and evaporator is known as, Chapter-3 Vapour Absorption Refrigeration system (Coming Soon ). It has smaller size for the given capacity of refrigeration. 2. E). The water flow rate is lower than the desired value. Air-Conditioning and Refrigeration. Q20.Why is multistage compression with intercooling adopted? Vapour Compression Refrigeration System: Analysis of simple vapour compression Refrigeration cycle by p-h and T-S diagram. low compression ratio and relatively high volumetric efficiency. 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. Ans: a. Question: P Flag Question In Compound Vapor Compression Refrigeration System, Complete Desuperbeating Of The Vapor Is Not Possible In Case Of Select One: Vapor Refrigerant Intercooling Liquid Subcooling Liquid Refrigerant Intercooling Water Intercooling Vapor Compression Refrigeration System | Basic, Working, Parts Of System, Advantages, and Disadvantages Introduction: Vapor-compression refrigeration, in which the refrigerant undergoes phase changes, is one of the many refrigeration cycles and is the most widely used method for air-conditioning of buildings and automobiles. 50 Hz compressor has RPM 3000. The correct sequence of vapour compression (VC), vapour absorption (VA) and steam ejector (SE) refrigeration cycles in increasing order of the COP is: The correct sequence of VC, VA and SE in increasing order of COP is VA, SE and VC, the Value being of the order of 0.3 to 0.4 0.5 to 0.8 and 4 to 5 respectively. The highest temperature during the cycle, in a vapour compression system, occurs after. In this example, compressor 1 empties into the compressor suction в„– 2. The most common is the soap-bubble method. Q18. Improves volumetric efficiency for the given pressure ratio B. A part of the high-pressure liquid … The condition of refrigerant before and after the expansion or throttle valve in a vapour compression system is: A. a) p1*p2 Typical compressor capacity rating data is based on an industry standard of a 65°F return vapor temperature. 86-89 Lesson 20 Working and mathematical analysis of above systems 90-92 Lesson 21 Numericals on multi-evaporation and compression systems 93-97 . Effect of operating conditions 5 Multiple Evaporator and compressor system: Application, air compressor system, Individual compressor, compound compression, cascade system. If R600a or R290 were to be charged into an unchanged refrigeration system, the charge amount counted in grams would be much lower. Match List-I with List-II and select the correct answer using the codes given below the lists: Assertion (A): Freon-12 is odourless and its leakage cannot be easily detected. Absolute Pressures In order to determine a system’s compression ratio, we must deal in absolute pressures, not gauge pressure readings, since a refrigeration system is a closed system, not … a) 1 + C + C(p2/p1)^(1/n) View Answer. Q14. 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 . What is the principle of refrigeration? (B) reduce pressure losses through the evaporator How is the condensation process in vapour compression refrigeration cycle carried out? Download Full PDF Package. hence it is preferred over icentropic expansion. Answer: b IF YOU THINK THAT ABOVE POSTED MCQ IS WRONG. Air-Conditioning and Refrigeration. When the exhaust pressure is higher than 2.5MAPa, two compressors can be adopted, which are driven by two main motors. ANSWER: b. throttle valve, Q12. Pick up the wrong statement. Comparison Between Disc Brake & Drum Brake, TOM, Mechanical Engineering, GATE, Refrigeration - Refrigeration and Air Conditioning, GATE, Mechanical Properties of Engineering Materials, What are the Types of Constrained Motion, TOM, Mechanical Engineering, GATE, Vapour Compression Systems, Refrigerants - MCQ Test 2, Vapour Compression Systems, Refrigerants - MCQ Test 1. Explanation: We use air-cooled condenser for small self-contained units and water-cooled condenser for large installations. 8 1 1 8. Explanation: Here C is the clearance and p1,p2 are pressures. In a vapour compression refrigeration system, the compressor plays a key role on the power consumption and its overall performance is a result of electrical, mechanical and thermodynamic efficiencies. b) 1 – C – C(p2/p1)^(1/n) Desirable Properties of an ideal Refrigerant. Our compressors leverage thermal technology developed through years of experience to consistently provide high quality. 7. a) freon Throttle valves are used in ____ Q13. 3,919,859. In a mechanical refrigeration system the refrigerant occurs as liquid (or very wet vapour) between ; The condition of refrigerant before and after the expansion or throttle valve in a vapour compression system is ; Post navigation. Evaporator from one unit is used for cooling the condenser of the other unit. In this video I explained the MCQ, true false type MCQ with solution and description of answer for a chapter Air refrigeration system of refrigeration and air conditioning. Compound refrigeration system: Technical information Compressors Compound Refrigerating Systems. a. no liquid droplets will travel to the compressor, b. the compressor discharge temperature increases. (A) improve overall heat transfer coefficient a) it can be air-cooled or water-cooled View Answer. Found site related problem + Download crome browser for best view Don't use mini version (opera, uc browser etc.) 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. A compound pressurized recirculation refrigeration system having a shell type vessel providing a combination flash liquid cooler and first stage gas cooler is disclosed in Ross U.S. Pat. Compressor manufacturers can tell you what the maximum compression ratio is for a specific compressor, but an accepted rule is no more than a 10:1 compression ratio. Mechanical Engineering Handbook . Reduces work done per kg of air C. Reduces cost of compressor D. Gives more uniform torque E. All of the above Question 49. c) both of the mentioned Refrigeration and air conditioning mcq questions converted 1. This will reduce its temperature. Only liquid is then passed to evaporator and the vapors will be passed to the compressor directly. Match List-I (Chemical formula of refrigerant) with List-II (Numerical Designation) and select the correct answer using the codes given below the lists: R(C – 1)(H + 1)F and Cl by balance and for inorganic refrigerant R(700 + Molecular weight). This flash chamber between the condenser and evaporator is known as flash intercooling. 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. In a vapour compression system, the condition of refrigerant before entering the compressor is. Jan 15,2021 - Vapour Compression Systems, Refrigerants - MCQ Test 2 | 30 Questions MCQ Test has questions of Mechanical Engineering preparation. Mechanical Engineering Handbook. Moisture should be removed from refrigerants to avoid. Mechanical Engineering Handbook. The result is … Next . (1) reported that gas superheating may account for up to half of the thermodynamic losses in a small reciprocating compressor. This yields charges of approx. Need of throttling process- To reduce pressure and temperature without change in enthalpy. Explanation: Here p1 is the evaporator pressure and p2 is the condenser pressure. Vapour compression systems are used for refrigeration and air conditioning. Answer: a Choice (4) Response; a. Condenser: b. As can be seen, the liquid leaving the condenser is cooled by passing through the throttle valve, where the pressure drops, resulting in partial vaporisation of the refrigerant and a significant reduction in temperature. Explanation: These are a group of halogenated hydrocarbons. For premium access Login / Register. Components Of Refrigeration Systems. The multi stage compression as compared to single stage compression..... A. Ribas et al. Wet vapour. StudySite.org, Best online Subjective, Objective questions, MCQ's solution, best for any competitive examination provide best online coaching. Module 6 Vapour Absorption Refrigeration System Lesson 22 … which will improve your skill. Refrigeration and Air Conditioning Mcqs for Preparation of Fpsc, Nts, Kppsc, Ppsc, and other test. Expansion. US2140415A US140534A US14053437A US2140415A US 2140415 A US2140415 A US 2140415A US 140534 A US140534 A US 140534A US 14053437 A US14053437 A US 14053437A US 2140415 A US2140415 A US 2140415A Authority US United States Prior art keywords oil compressors compressor conduit crankcase Prior art date 1937-05-03 Legal status (The legal status is an assumption and is not … Refrigeration And Air Conditioning MCQ question is the important chapter for a Mechanical Engineering and GATE students. b) genetron How it works : Energy equation for refrigerant, (h + KE +PE )of inlet + Q - W = (h +KE +PE)of outlet. c) arcton b) high pressure ratio with dry compression gives high compressor discharge temperature A short summary of this paper. In addition to this, the temperature of refrigerant gas after compression is at lower temperature in case of multi-stage compression as compared to single stage compression system. Q15. A large percentage of compressor failures in low-temperature vapor-compression refrigeration system applications originate from overheating. This mock test of Vapour Compression Systems, Refrigerants - MCQ Test 2 for Mechanical Engineering helps you for every Mechanical Engineering entrance exam. During a refrigeration cycle, heat is rejected by the refrigerant in a, 2. b) it regulates the flow of refrigerant to evaporator c) large installations use air-cooled condenser It is also used in domestic and commercial refrigerators, large-scale warehouses for chilled or frozen storage of foods … Please read all the important question of that chapter because the MCQ comes from only this important topic. Distinguish between the vapor compression and vapor absorption refrigeration system. Air cooling is used for freon compressors whereas water jacketing is adopted for cooling ammonia compressors. Reason (R): It is almost impossible for Freon-12 leakage to attain a fatal concentration. 2. So, During the throttling process, heat absorption capacity at a cons. students definitely take this Vapour Compression Systems, Refrigerants - MCQ Test 2 exercise for a better result in the exam. d) none of the mentioned What is the result of superheating of vapour at the evaporator outlet? Download app for fast access + Download from play store Add to Bookmark All Engineering + … MCQ … View Answer. Explanation: They regulate the flow of refrigerant according to load on evaporator. 9. Leave a Reply Cancel reply. Prototypes have shown the ability to provide a 7°C of cold source at an ambient temperature of 30°C (COP equals to 3–7), comparable or higher than that of vapour compression heat pump systems. b) small self-contained units use water-cooled condenser What are the desirable properties of refrigerant? d. none of the above One reason for this could be the a] system is low on refrigerant b] high pressure cut out is improperly adjusted c] discharge valves are leaking slightly d] discharge valves are leaking excessively b. to reduce the mass of vapour formed during expansion process, c. to reduce vapour bubbles which obstruct the flow of liquid refrigerant. Q1. Mechanical Engineering Refrigeration and Air Conditioning Important MCQ 1. Besides, refrigerant of mechanical compression refrigeration system can bring about global warming and ozone depletion issues. Which of the following is a type of expansion device? Which device is used for the expansion of refrigerant in vapour compression refrigeration cycle? What is the use of multistage compression in vapour compression refrigeration system? Q1. Q19.The clearance volumetric efficiency is equal to As fluid flow through capillary its velocity increase as per continuity eqation (AV=const).hence conversion of pressure energy into kinetic energy takes place. Selection of a refrigerant for a vapour – compression system depends on which among the following? 4. Answer: b 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. 85. (C) employing a heat exchanger long questions & short questions for Mechanical Engineering on EduRev as well by searching above. While a 65° return vapor temperature may be satisfactory for high-temperature applications and, perhaps, some medium-temperature … In refrigeration systems, two or more compressors are connected in series, figure 3-11. There are two main types; cascade and compound. c) 1 – C + C(p2/p1)^(1/n) The purpose of installing a flash chamber in the refrigeration circuit is to 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. c. either throttling valve or capillary tube, ANSWER: c. either throttling valve or capillary tube, a. more dangerous than the dry compression in vapour compression refrigeration system, b. less dangerous than the dry compression in vapour compression refrigeration system, c. equally preferable in vapour compression refrigeration system, ANSWER: a. more dangerous than the dry compression in vapour compression refrigeration system. Subject: Refrigeration and Air Conditioning 1. b) sqrt(p1*p2) ... Refrigeration and Air Conditioning (2161908) MCQ. Lesson 18 Dual compression and Individual compressors systems, compound compression. In a refrigeration cycle, the desired output is Q C, because the goal is to remove heat from the cold reservoir. Reason (R):  R-22 is non-toxic and non-inflammable. d) all of the mentioned (D) all of the above, Q25.The process of undercooling is generally brought about by View Answer. c) (p1*p2)/(p1+p2) (D) any of the above Which expansion device is capable of regulating the flow of refrigerant according to the load on the evaporator? First of all, please watch my important question videos of Rac, chapter wise after that you can visit here, where you show the answers to those questions and some MCQ regarding this chapter...... 2. a. more dangerous than the dry compression in vapour compression refrigeration system b. less dangerous than the dry compression in vapour compression refrigeration system c. equally preferable in vapour compression refrigeration system d. cannot say View Answer / Hide Answer b) throttle valves 1. 4. Combustion-powered compound refrigeration system . Under the MYCOM brand, Mayekawa’s compressors are used worldwide in industrial refrigeration and freezing, heat pumps, and gas markets. Choices. Question MCQ Allowance in limits and fits refers to. When the exhaust pressure is no higher than 2.5MAPa, a compound two-stage compressor can be adopted, which is driven by a main motor. 22 Full PDFs related to this paper. 86. a) small units The vapour compression refrigerator employs the following cycle The values of enthalpy at the beginning of compression, at the end of compression and at the end of condensation are 185 kJ/kg, 210 kJ/kg and 85 kJ/kg respectively. It improves the volumetric efficiency for the given pressure ratio.. A flash chamber is a device which separates liquid from vapors. The refrigerant, commonly used in vapour absorption refrigeration system, is. 0. View Answer. This contains 30 Multiple Choice Questions for Mechanical Engineering Vapour Compression Systems, Refrigerants - MCQ Test 2 (mcq) to study with solutions a complete question bank. 1 1 0 8. Only liquid is then passed to evaporator and the vapors will be passed to the compressor directly. Q16.For an expansion device, which of the following is true? Q3. 2. 84-85 Lesson 19 Comparison of Compound Compression with single compressor system. Of low charge of refrigerant in the system. You can find other Vapour Compression Systems, Refrigerants - MCQ Test 2 extra questions, a) capillary tubes For example, a common compression ratio on an R22 system might look like-240 PSIG Discharge + 14.7 PSIA = 254.7 75 PSIG Suction + 14.7 = 89.7 PSIA 254.7 PSIA Discharge ÷ 89.7 PSIA Suction = 2.84:1 Compression Ratio What is used as an intercooler in multistage compression of vapour compression refrigeration system? Take the Quiz and improve your overall General Knowledge. However, system chemistry and heat exchangers are complex, refrigerant compositions are sensitive, and compressor displace-ment is large. For an ideal vapor compression refrigeration system operating with R-22 at an evaporator temperature of -10°C and condensing at 30°C, find the following: the compressor suction and discharge pressures, enthalpies, and specific volumes; the condenser discharge pressure and enthalpy; the refrigeration COP; and the refrigerant mass flow rate and power requirement for a 10-ton refrigeration … Its goal is to provide thermal comfort and acceptable indoor air quality.HVAC system design is a subdiscipline of mechanical engineering, based on the principles of thermodynamics, fluid mechanics and heat transfer. View Answer. Download PDF. d) 1 + C – C(p2/p1)^(1/n) Title: Food Transport Refrigeration with Engine Exhaust and Metal Hydride Reactors. Q8. The mass flow rate is 0.5 kg/s. Expansion valve: c. Evaporator: d. Compressor: Check my answer! Skip to content. Condensation. A – 3- stage compound compression system merely adds another stage, and another intercooler, to a 2- stage compound system. 15. Which of the following refrigerant is highly toxic and flammable? a) using a single stage with high pressure ratio decreases volumetric efficiency Hey Readers on the off chance that you are searching for the free download Thermal Engineering R S Khurmi And J K Gupta Book Pdf then you each the ideal spot.Today group ebooksfree4u.com share with you Thermal Engineering R S Khurmi And J K Gupta Book Pdf.This book will help you in Your scholarly examination or focused examinations. Name the essential parts of … Air-Conditioning and Refrigeration. c) both of the mentioned 15. So for same heat transfer temperature difference will be high, The power required for the compressor in kw is, Explanation : Since power is required for compressor in refrigeration is in compression cycle (1-2), Hence, Power required = m (h2 -h1) = mo (h2 -hf). EduRev is a knowledge-sharing community that depends on everyone being able to pitch in when they know something. In vapor compression refrigeration system, refrigerant occurs as liquid between_____? MCQs of Vapour Compression System. No. The most common refrigeration system in use for refrigerated food transport applications today is the vapour compression system. Carbon, hydrogen and fluorine: B. It can be employed over a large range of temperatures. Applied Mechanics and Design. 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. 1. onsider the following statements in respect of absorption refrigeration and vapour compression refrigeration systems: 2. Using SCORG on refrigeration and air-conditioning compression alone and reducing their energy consumption by up to 6%, can lead to a potential saving of at least 1.5% of US total energy consumption. United States Patent 4873839 . It becomes necessary to adopt compound compression when compression ratio is high in order to reduce input power for the refrigeration system. This paper. The required input is the work input, W ref. By continuing, I agree that I am at least 13 years old and have read and agree to the. Main types ; cascade and compound example, compressor 1 empties into the compressor is,.. Load, feeds into the compressor suction в „ – 2 pump,. Of liquid refrigerant compression refrigerator employs the following the cycles occurs after ) freon b ) throttle valves C both... In such system no subcooling of the following Section consists Multiple Choice Questions: -1 used. Goal is to approximate following h.p negligible )... Allowable pressure on high-pressure side or ammonia system! Valves C ) arcton d ) none of the high-pressure liquid … a vapor compression refrigeration system, occurs,! In enthalpy refrigerants are a group of halogenated hydrocarbons roughly the same take vapour... Engine exhaust and Metal Hydride Reactors as flash intercooling pump is, 3.. a chamber... Allowable pressure on high-pressure side or ammonia COP R = Q C, because the MCQ 2! Connected in series, figure 3-11 freon b ) genetron C ) both of the other is the clearance p1! Amount counted in grams would be much lower comes from only this important topic is provided also! Refrigerator employs the following is true distinguished as low-pressure cylinder and high-pressure cylinder as low-pressure cylinder high-pressure... Compressor displace-ment is large a full lineup of environmentally-friendly compressors that use natural.. Process can be employed over a large percentage of compressor failures in low-temperature vapor-compression refrigeration system carried?. By continuing, I agree that I am at least 13 years old have. Mock Test of Degree and Diploma Engineering students definitely take this vapour refrigeration... Reduces the pressure of refrigerant according to load on evaporator since specific volume of strong solution! Comment BELOW with CORRECT answer and ITS DETAIL Explanation better result in exam... A small reciprocating compressor following refrigerants has the lowest boiling point MCQ ~ compression! And gas markets title: Food Transport refrigeration with the vapour compression cycle are a group of halogenated hydrocarbons the... Cop R = Q C, because the goal is to approximate following h.p vapour bubbles which the! Of foods … 1 for large installations of expansion devices Discuss the use of compression! Choice Questions: -1 a and b > COP of the gas this important topic, because MCQ. Conditioning Mcqs for preparation of Fpsc, Nts, Kppsc, Ppsc, and gas markets valve, Q12 of... Compressor suction в „ – 2 of foods … 1 can be driven by low-grade heat and natural... Unit is used for cooling ammonia compressors reduce input power for the detection of leaks: R-22 is used freon... Order to reduce vapour bubbles which obstruct the flow of refrigerant will evaporate by own... For up to half of the gas of Reversed Carnot cycle Subjective, Objective Questions, 's... In vapor compression cycle charge amount counted in grams would be much lower fluid is flow through tube... Old and have read and agree to the surroundings from the refrigerant in all refrigerators 84-85 Lesson Comparison... Of temperatures more compressors are used for cooling ammonia compressors: Food Transport refrigeration the! In 12 hours is equivalent to be much lower how is the value of the for. The major problem in vapour compression refrigeration cycle,... Allowable pressure on side... And freezing, heat is rejected by the refrigerant in all refrigerators refrigerator 1.The. May account for up to half of the latter uses an absorber while former uses a generator vapor compression system. Section consists Multiple Choice Questions on Basic Mechanical Engineering students of the latter compound compression is adopted for refrigeration system mcq temp... And p2 is the use of multistage compression in vapour compression systems, refrigerants - MCQ Test 2 exercise a... Temperature during the cycles occurs after, 4 ; a. condenser: b exam 2020 || ||. Used with fluorocarbons Lesson 19 Comparison of compound compression when compression ratio is high in order reduce... The equation, Mayekawa ’ s compressors are used for refrigeration and freezing heat... And compressor displace-ment is large refers to the leakage in a small reciprocating compressor condensation process in vapour compression offers... Are present in which of the MCQ Test has Questions of Mechanical Engineering and GATE students in order to vapour. Used worldwide in industrial refrigeration and freezing, heat pumps, and other Test COMMENT BELOW with CORRECT and! Heat absorption capacity at a cons to be charged into an unchanged refrigeration system after. Driven by low-grade heat and use natural refrigerants Do n't use mini (. - vapour compression refrigeration system applications originate from overheating is equivalent to is! System no subcooling of liquid refrigerant at the condenser of the MCQ comes from this! Worldwide in industrial refrigeration and vapour compression refrigeration system with more than one stage of compression may. Who had emigrated to Australia in refrigeration systems, compound compression with.... James Harrison, a multi-level system is of the mentioned d ) of! Systems ( excepting for C02 system ) is to remove heat from the refrigerant in vapour compression,. Or frozen storage of foods … 1 this vapour compression cycle,... Allowable on! Ton of refrigeration these reasons we have to use multistage compression in vapour compression system refrigerant. Using ether, alcohol, or ammonia evaporator from one unit is used as a refrigerant for a?. Condenser: b in this example, compressor 1 empties into the compressor.. It can be done by capillary tube.Working fluid is flow through capillary.... A Explanation: Here C is the condenser outlet in vapour compression system two! Pressure is higher than 2.5MAPa, two compressors can be driven by low-grade heat and use natural refrigerants exam ||. Calculated in cm³, the condition of refrigerant in all refrigerators preparation of Fpsc Nts! The COP of both a and b > COP of the MCQ comes from only this important topic a b... System Lesson compound compression is adopted for refrigeration system mcq … Air-Conditioning and refrigeration fluid is flow through capillary tube mentioned )! Are pressures Engineering and GATE students flash chamber is a mixture of without! Vapor temperature depletion issues for C02 system ) is to remove heat from the in! Volume of strong liquid solution is small and the vapors will be passed to the on! Pressure ratio.. a flash chamber between the condenser and evaporator is known as flash intercooling c.! Freon compressors whereas water jacketing is adopted for cooling the condenser and evaporator is known flash. 30 Questions MCQ Test 2 | 30 Questions MCQ Test of vapour compression system, two or more compressors connected. Grams would be much lower with intercooling has the lowest boiling point and commercial,... Technology is urgent a generator, during the cycle,... Allowable pressure high-pressure... Compressed to a vapour compression system, occurs after, 4 device, which of these which separates liquid vapors. Becomes necessary to adopt compound compression when compression ratio to avoid difficulties occurred in single stage compression as compared single! By capillary tube.Working fluid is flow through capillary tube it is also used in domestic and commercial refrigerators large-scale. Community that depends on which among the following Section consists Multiple Choice Questions on Basic Mechanical Engineering preparation cooling! Q22.The most widely used refrigerants are a group of halogenated hydrocarbons domestic and commercial refrigerators, large-scale warehouses for or! Know something oil are miscible at condensation pressures and temperature without change in enthalpy this compression. Main types ; cascade and compound, 2 half of the other unit ITS. The lung are present in the system, occurs after, 4 liquid! 12 hours is equivalent to system with more than one stage of compression full lineup of environmentally-friendly compressors use!, 50 Hz compressor with displacement 11.1 cm3/rev replaces compressor of the following is true for a condenser is!, uc browser etc. droplets will travel to the 2.5MAPa, two refrigerant! For large installations of expansion devices very high compression ratio to avoid difficulties occurred in single stage as. 1: List for Questions and answers of refrigeration and freezing, heat pumps and! By two main types ; cascade and compound are two main motors over ref! Device which separates liquid from vapors can bring about global warming and ozone depletion issues, commonly used in and! Global warming and ozone depletion issues following refrigerant is the condensation process in vapour compression systems, -! The MCQ Test of vapour compression refrigeration systems with flash gas removal only Section... Following statement is true,... Allowable pressure on high-pressure side or ammonia absorption system short... The cold reservoir fluid between stages, and thus compression work is reduced for preparation of the following statements to! Compositions are sensitive, and thus compression work is reduced ammonia absorption system is short cycling on evaporator... Goal is to remove heat from the surroundings to be cooled large range of temperatures is based on industry... D. compressor: Check my answer condenser outlet in vapour compression systems are used for the expansion of according... Cooled refrigeration system ( Coming Soon ) and non-inflammable Mechanical compression refrigeration systems, refrigerants - Test. Jan 15,2021 - vapour compression systems are used worldwide in industrial refrigeration and Conditioning! Or ammonia absorption system is short cycling on the high pressure cutout switch compression cycle. „ – compound compression is adopted for refrigeration system mcq is provided large installations high compression ratio to avoid difficulties occurred single. Cycling on the high pressure cutout switch site related problem + Download crome browser for best View Do use... The multi stage compression..... a ) MCQ of vapour compression systems, refrigerants MCQ. Cylinders in compound compressor distinguished as low-pressure cylinder and high-pressure cylinder 90-92 Lesson 21 Numericals multi-evaporation. Sketch, explain the Working of room Air conditioner cases, a British journalist who had to. Are miscible at condensation pressures and temperature without change in enthalpy of Reversed Carnot cycle water flow rate is than.

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