In this system ammonia is used as refrigerant and solution is used is aqua ammonia. TOP Refrigeration and Air Conditioning -Mechanical Engineering Multiple choice Questions and Answers ListBell-coleman (e) none of the above. 1. Q9.  Quiet in operation, low maintenance cost. b) higher, richer a. throttling valve. Which device is used for the expansion of refrigerant in vapour compression refrigeration cycle? The vapour going to condenser is ____ in temperature and ____ in ammonia. In absorption refrigeration cycle, which of the following is used? c) both of the mentioned 3. b) high View Answer. In a ideal vapour absorption system the absorber pressure is equal to the pressure of, 3. View Answer. In a vapour absorption refrigeration system, the compressor of the vapour compression system is replaced by Absorber, generator and liquid pump Nusselt number (NN) is given by A. NN = … 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, ***************************************************************. Wet compression is _____. The heat flow in the system at generator, and work is supplied to pump. (even for above 1000 TR)  Can be operated at designed C.O.P’s or even at part loads by varying generator temperature. a) true The most common refrigerants include Chlorofluorocarbons (CFCs), Hydrochlorofluorocarbons (HCFCs), Hydrofluorocarbons (HFCs), and Natural Refrigerants. Expression for mass of motive steam required ? Ans: d 5. The name Freon is a trademark registered by E.I. MCQ No - 1. MCQ-VAPOR ABSORPTION REFRIGERATION. Even though water (R718) is one of the oldest refrigerants, state of the art technology is required to use water as a refrigerant in compression refrigeration plants with turbo compressors. are different. It is safe for normal handling as it is non-toxic, non-flammable and non-corrosive. Answer: b What is the condition of refrigerant at the exit of evaporator in aqua-ammonia absorption system? b) false The wet bulb depression is zero when relative humidity equals, 6. (c) Freon-22. Working of Simple Vapor absorption system: A Simple Vapor absorption system consists of evaporator, absorber, generator, condenser, expansion valve, pump & reducing valve. Which is the primary refrigerant in central air conditioning plant. Lithium bromide-water vapour is another absorption refrigeration system.  Can work only with thermal energy as an input. View Answer. Answer: a b) absorbent MCQ important questions || Rgpv online Exams, 1. The boiling point of ammonia is (A) -10.5°C (B) -30°C (C) -33.3°C (D) -77.7°C. Answer: c Vapour Absorption Refrigeration system: A Vapour absorption system utilizes the low-grade form of heat energy to produce Cold. A.To cool the vapour leaving the analyzer B.To separate ammonia and water C.To dissolve ammonia in water D.To add energy from external source E.None of the above, Your email address will not be published. • Maintenance cost is low as because of absence of moving part. a) water is the refrigerant and ammonia is the absorbent View Answer. b) boiling point of ammonia is more than that of water 7. that was commonly used in centrifugal chillers and before the 1970's it was used as a propellant for aerosols. 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. 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