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On the pressure-enthalpy diagram, condensation and desuperheating is represented by … (d) can be avoided by proper design Efficiency of a Carnot engine is given as 80%. Ans: a, 23. (c) increase cooling effect Ans: c, 73. (e) increase refrigeration effect. (a) results in loss of heat due to poor heat transfer On the pressure-enthalpy diagram, condensation and desuperheating is represented by a horizontal line because the process. Formation of frost on evaporator in refrigerator Ans: a, 81. (c) – 33.3°C Domestic refrigerator working on vapour compression cycle uses the following type of expansion device Ans: a, 19. (b) 5 tons Mechanical Engineering Multiple choice Questions and Answers. Ans: d, 22. (d) Superheat and sensible heat of a. refrigerant are same (e) none of the above. In vapor compression cycle, the condition of refrigerant is high pressure saturated liquid (a) increases COP Allowable pressure on high-pressure side or ammonia absorption system is of the order of Top refrigeration and air conditioning question and answers (e) takes place at constant pressure. (c) euqal (e) throttling device. (d) all of the above (d) the refrigeration effect to produce 1 ton of ice at NTP conditions (b) Freon-11 (a) the standard unit used in refrigeration problems (b) above which liquid becomes gas (e) Hydrocarbon refrigerant. The attached PDF contains all questions asked in previous years of Mechanical Engineering (ME) GATE Exam for the topic - Refrigeration & Air-conditioning along with Answers. Ans: d, 30. (a) increases COP Home Aptitude Logical (d) S02 (c) after passing through the expansion or throttle valve (c) the refrigeration effect to freeze 1 ton of water at 0°C into ice at 0°C in 24 hours These short solved questions or quizzes are provided by Gkseries. Ans: c, 17. (d) all of the above (c) evaporator (b) lithium bromide plant can’t operate below 0°C (e) in 10 hours. The PDF file has four behavioral interview questions … One ton of refrigeration is equal to the refrigeration effect corresponding to melting of 1000 kg of ice (e) 3 : 1 per ton of refrigeration (d) near critical pressure (c) water will evaporate (d) water will never evaporate In a vapor compression cycle, the refrigerant immediately after expansion valve is (a) same Ans: d, 69. per ton of refrigeration (b) decrease Multiple Choice Questions with Answers on Refrigeration and Air-Conditioning - Set 07 Practice Test: Question Set - 07 1. (a) after passing through the condenser (c) superheat the vapour (a) a gas will never liquefy (b) smaller (a) same A certain refrigerating system has a normal operating suction pressure of 10 kg/cm gauge and condensing pressure of about 67 kg/cm. The condensing pressure due to the presence of non-condensable gases, as compared to that actually required for condensing temperatures without non-condensable gases, Question3: What is Air Ans: c, 52. Ans: e, 15. (b) a gas will immediately liquefy (e) 100%. (b) evaporator (b) Carnot CIVIL | Mechanical | CSE | EEE | ECE | IT | Chemical Online Quiz Tests for Freshers. (b) before passing through the condenser (a) -100°C (a) after passing through the condenser (a) Tow specific heat of liquid (b) Rankine cycle (c) less (e) dual cycle. Freon group of refrigerants are (A) Inflammable (B) Toxic (C) Non-inflammable and toxic (... Best Refrigeration and Air Conditioning Objective type Questions and Answers. (a) compression (b) before passing through the condenser Ans: d, 62. (d) unpredictable (e) none of the above. (d) 1-actual COP x theoretical COP The general rule for rating refrigeration systems (excepting for C02 system) is to approximate following h.p. Refrigeration MCQs Quiz Questions Answers GK MCQs. (c) Precooling and subcooling bf refrigerant are same Explanation are given for understanding. This is the mechanical engineering questions and answers section on "Heat Transfer, Refrigeration and Air Conditioning" with explanation for various interview, competitive examination and entrance test. (a) Freon-11 (a) noisy operation (a) after passing through the condenser An HVAC engineer's job duties can include the design, installation, maintenance, and repair of heating, ventilation, air conditioning, cooling, and refrigeration systems. (b) before passing through the condenser Highest pressure encountered in a refrigeration system should be Critical pressure of a liquid is the pressure Ans: d, 58. Refrigeration in aeroplanes usually employs the following refrigerant (b) theoretical COP/actual COP The COP of a domestic refrigerator (d) before entering the expansion valve (c) Freon-22 Multiple Choice Questions on Refrigeration and Air ... TOP 95+ Refrigeration and Air Conditioning Multiple choice ... MCQs preparation for Engineering Competitive Exams. (d) compressor and condenser (b) before passing through the condenser (c) Rankine cycle (a) Temperature of medium being cooled must be below that of the evaporator (b) Refrigerant leaves the condenser as liquid 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. Ans: e, 68 Ammonia is (d) depends upon the make Most Asked Technical Basic CIVIL | Mechanical | CSE | EEE | ECE | IT | Chemical | Medical MBBS Jobs Online Quiz Tests for Freshers Experienced. (a) it permits higher speeds to be used (e) depends upon the weather conditions. (a) actual COP/fheoretical COP (b) 0.5 to 0.8 h.p. 9/20/2020 Heat Transfer, Refrigeration and Air Conditioning - Mechanical Engineering Questions and Answers Search. Latest Refrigeration and Air Conditioning - Mechanical Engineering Multiple choice Questions and Answers pdf 31. (a) condenser tubes Formation of frost on evaporator in refrigerator (a) results in loss of heat due to poor heat transfer (b) increases heat transfer rate (c) is immaterial (d) can (c) less Ans: d, 21. (a) Ericsson (d) reversed Rankine cycle (e) none of the above. (b) will be lower (c) after passing through the expansion or thiottle valve (e) unpredictable. Presence of moisture in a refrigerant affects the working of Ans: e, 3. Refrigeration and Air conditioner interview questions for utility Operator and engineer. (c) perfectly tight vapour seal should be used (c) high pressure side close to receiver Download Refrigeration & Air Conditioning MCQ’s 2020 Quiz and Free refrigeration and air conditioning interview questions and answers pdf Refrigeration and air conditioning question bank new collection of mcqs online. (c) much above critical pressure (a) lithium bromide used in vapour absorption cycle is nonvolatile (c) equally. Ans: a, 24. The leaks in a refrigeration system using Freon are detected by (a) 1 : 1 Ans: b, 45. In vapor compression cycle the condition off refrigerant is dry saturated vapor 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 Practice Test: Question Set - 07. (c) absorber (e) none of the above. (d) Bell-coleman (c) a separator is used in lithium bromide plant to remove the unwanted water vapour by condensing (e) none of the above. (b) 1.2 (d) low latent heat Ans: b, 63. 100 TOP Refrigeration and Air Conditioning Multiple choice Questions and Answers pdf 71. of a refrigeration cycle with lowering of condenser temperature, keeping the evaporator temperature constant, will (e) heat transfer. The advantage of dry compression is that (d) condenser discharge Ans: a, 49. (e) before entering the compressor. (b) evaporator tubes (e) Brayton cycle. (a) Freon-12 (d) any one of the above (c) enthalpy increase in compressor In refrigerators, the temperature difference between the evaporating refrigerant and the medium being cooled should be In vapor compression refrigeration system, refrigerant occurs as liquid between (c) 420 kJ/min (b) it permits complete evaporation in the evaporator (d) expansion valve (a) after passing through the condenser (c) 5 (e) its input only in the form of heating. (b) high (b) low Ans: d, 29. (a) 0.2 (c) thermostatic valve Below are the list of top Refrigeration and Air Conditioning Interview Questions and Answers pdf free download for freshers & experienced engineering students.Refrigeration and Air Conditioning Mcqs Objective Questions with Answers. Ans: d, 83. One of the purposes of sub-cooling the liquid refrigerant is to (b) saturation point of liquid Ans: a, sir, (a) inflammable 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. (a) always less than unity Which of the following is not a desirable property of a refrigerant (e) compressor discharge. Refrigeration and air conditioning objective type questions and answers - Set 16 MCQ Refrigeration Edit Practice Test: Question Set - 16 1. Freon group of refrigerants ... 100 TOP Refrigeration and Air Conditioning Multiple choice Questions and Answers pdf 71. (c) 2-4 bars (a) is less than 1 10. 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. (d) much below critical temperature (d) any value (e) none of the above. (c) actual COP x theoretical COP (a) very little work input Ans: d, 34. (a) in 1 hour (a) decreases Mechanical Engineering Multiple Choice Questions. (b) of freezing zone If the evaporator temperature of a plant is lowered, keeping the condenser temperature constant, the h.p. (b) condenser (a) Carnot cycle (e) none of the above. 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Free download in PDF Refrigeration and Air Conditioning Multiple Choice Questions and Answers for competitive exams. (a) vapour compression (e) weak solution in liquid heat exchanger gives up heat to the strong solution. The candidate's answer will show their understanding of refrigeration. (e) unpredictable. (b) 1.2 Domestic refrigerator working on vapour compression cycle uses the following type of expansion device (c) using reagents (b) reduce compressor discharge temperature (d) higher critical temperature Air refrigeration cycle is used in (d) collect vapours (a) non-toxic (e) under some conditions small and under some conditions high. (a) small (a) critical pressure of refrigerant HVAC Technician Interview Questions 1. (c) zero (d) could be anything (b) vapour absorption (c) it results in high volumetirc and mechanical efficiency Ans: a, 95. (e) unpredictable. (d) 2 to 5 h.p. 300+ TOP Refrigeration & Air Conditioning Multiple Choice ... Below are the list of top Refrigeration and Air Conditioning Interview Questions and Answers pdf free download for freshers & experienced engineering students (b) more (c) total heat lines In actual air-conditioning applications for R-12 and R-22, and operating at a condenser temperature of 40 C and an evaporator temperature of 5 C, the heat rejection factor … (b) expansion valve Ans: d, 79. (a) above which liquid will remain liquid (e) unpredictable. The C.O.P. (c) 50% (c) same (c) 0.5 (d) triple point (e) 10. Take the Quiz and improve your overall Physics. Ans: c, 26. 100 TOP Refrigeration and Air Conditioning Multiple choice ... 300+ TOP Refrigeration & Air Conditioning Multiple Choice ... Online Refrigeration & Air Conditioning MCQ's Quiz | Web Solution, MCQ on Heat Transfer, Refrigeration and Air Conditioning. (e) dry vapour. (a) 0.1 to 0.5 h.p. 2. (d) before entering the expansion valve (d) Brayton (c) COP remains unaltered A refrigeration cycle operates between condenser temperature of + 27°C and evaporator temperature of- 23°C. (c) freezing automatic regulating valve (e) 5 to 10 h.p. (c) strong solution to ammonia vapour They may work in the design in technical offices or in the installation in contracting companies. (d) more/less depending on size of plant Ans: b, 28. Multiple Choice Questions with Answers on Refrigeration ... Refrigeration and Air Conditioning Multiple choice Questions. which will improve your skill. (d) mixture of ice, water and vapour under equilibrium conditions under NTP conditions This is the mechanical engineering questions and answers section on "Heat Transfer, Refrigeration and Air Conditioning" with explanation for various interview, competitive examination and entrance test. File name: HVAC-Technician-Behavioral-Interview-Questions-Worksheet.pdf. (c) equal to unity (b) maximum work input (b) increases power required per ton of refrigeration (e) the refrigeration effect to produce 1 ton of ice in 1 hour time. Ans: c, 65. (d) Brine (a) heat of compression Ans: d, 56. Ans: a 47. Superheating in a refrigeration cycle (b) takes place at constant temperature (b) is more than 1 (e) before entering the compressor.. Community Answers "I am a very well educated and me hanically inclined individual. (a) increase For better COP of refrigerator, the pressure range corresponding to temperature in evaporator and condenser must be of compressor required will be Multiple Choice Questions on Refrigeration and Air-Conditioning - Set 08 MCQ Refrigeration Edit Practice Test: Question Set - 08 . (d) there is no such consideration (e) non-toxic and non-inflammable. (c) C02 Latest Refrigeration and Air Conditioning Questions and Answers 1. 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Temperature occur in a Refrigeration cycle operates between condenser temperature, influences the value of C.O.P 300+... Technical offices or in the installation in contracting companies times, HVAC Technicians assist with Refrigeration systems ( for. The design in technical offices or in the installation in contracting companies absorption plant is lowered keeping. Consists of Heat Transfer, Refrigeration and Air Conditioning Refrigeration program is an,...

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