However, the COP of actual VARS will be much less than that of … These short objective type questions with answers are very important for competitive exams. a) refrigerant Properties of refrigerants? Go To Download Page Close. Refrigerants should have low freezing point than the normal operating conditions. In this system ammonia is used as refrigerant and solution is used is aqua ammonia. Refrigeration And Air Conditioning MCQ question is the important chapter for a Mechanical Engineering and GATE students. b. to remove water vapour out from ammonia after generator, c. to exchange heat between weak solution and strong solution, ANSWER: b. to remove water vapour out from ammonia after generator. The simple vapor compressor system is used where there is scarcity of Electricity and it is very useful at partial and full load. Answer: b In this system, the working substance is a refrigerant like NH 3, R-11, R-12.. Explanation: Both refrigerant and absorbent are used in absorption refrigeration cycle. Related posts: Water is used as a refrigerant in ; Which of the following has lowest COP? (b) Water. is also known as Tetrafluoroethane (CF3CH2F) from the family of HFC, . What is the purpose of analyser-rectifire in aqua-ammonia absorption system? However, unlike vapour compression refrigeration systems, the required input to absorption systems is in the form of heat. It is safe for normal handling as it is non-toxic, non-flammable and non-corrosive. ADVERTISEMENTS: (b) Condenser (c) Expansion valve (d) Evaporator . The name Freon is a trademark registered by E.I. c) both of the mentioned ... With an Ozone Depleting Potential (ODP) of 0 and a Global Warming Potential (GWP) of 1, , state of the art technology is required to use water as a, plants with turbo compressors. Thus, the function of a compressor is done by absorber, a generator, pump and reducing valve. Explanation: The Cop of absorption refrigeration system is low, 11.In a vapour absorption refrigeration system the power is required for vapour compressor as compared to that in vapour compression cycle is, [A].More[B].Less[C].Half[D].One forth[E].There is no such relation, SSC-JE & RRB-JE(Mechanical) Full syllabus free video lectures:- https://www.4bengineers.com/post/ssc-je-rrb-je-free-full-video-lectures-mechanical-engineering, *******************************************************************, For College Info:-https://www.4bengineers.com/4bjobalert/categories/college-counselor, ******************************************************************, FOR NOTES AND STUFFS (Our Website):- https://www.4bengineers.com/, My Amazon Store for You:- https://www.amazon.in/shop/4bengineers?isVisitor=true, *************************************************************************, Telegram channel link:-https://t.me/ashish4Bengineers, **********************************************************************, For Job Updates :- https://www.4bengineers.com/4bjobalert, *************************************************************, Instagram:- https://www.instagram.com/4bengineers/?hl=en, Facebook:- https://www.facebook.com/4bengineers, ***************************************************************. Vapor absorption refrigeration is also a vapor compression system. Answer: d Ammonia-absorption refrigeration cycle requires (a) very little work input (b) maximum work input (c) nearly same work input as for vapour compression cycle (d) zero work input (e) none of the above. It is now being used as a replacement for. Q4. It causes refrigeration from heat. Ans: b. Which is the primary refrigerant in central air conditioning plant. Explanation: In this, water is the refrigerant and solution of lithium bromide in water is the absorbent. a) true (A) 1.25 (B) 0.8 (C) 0.5 (D) 0.25. Free download in PDF Refrigeration and Air Conditioning Multiple Choice Questions and Answers for competitive exams. Electrolux refrigeration system? Multiple choice questions on Refrigeration and air conditioning - Set 13 MCQ Refrigeration Edit Practice Test: Question Set - 13. Refrigeration & Air-Conditioning MCQ Question with Answer Refrigeration & Air-Conditioning MCQ with detailed explanation for interview, entrance and competitive exams. Refrigeration and Air Conditioning – Mechanical Engineering Multiple Choice Questions : 1. Vapor absorption refrigeration uses (a) Mechanical energy (b) Electric energy (c) Kinetic energy (d) None (Ans: d) Vapor absorption refrigeration uses (a) Mechanical energy (b) Electric energy (c) Heat … d) none of the mentioned (d) … Contents. Explanation: The saturation temperature of water is higher than ammonia at any given pressure. Famous Heat Transfer, Refrigeration and Air Conditioning multiple choice question for Technology associate engineering and vocational training institute students to give a job exam. d) none of the mentioned 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. ANSWER: c. either throttling valve or capillary tube . Working of Simple Vapor absorption system: A Simple Vapor absorption system consists of evaporator, absorber, generator, condenser, expansion valve, pump & reducing valve. 1. d) lower, richer Q3. 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