Vapour Compression Systems, Refrigerants - MCQ Test 2 QUESTION: 1 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. View Answer, Answer: a a. weak solution of ammonia in water is heated, b. strong solution of ammonia in water is heated, c. only water is heated and heat is given to the ammonia to form its vapour, ANSWER: b. strong solution of ammonia in water is heated, Q5. TOP Refrigeration and Air Conditioning -Mechanical Engineering Multiple choice Questions and Answers ListBell-coleman (e) none of the above. In absorption refrigeration cycle, which of the following is used? Q2. Wet compression in vapour compression cycle means, 2. 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. 7. liquid pump generator absorber and generator absorber, generator and liquid pump ⇒ In vapour compression cycle using NH3 as refrigerant, initial charge is filled at suction of compressor delivery of compressor Q4. Answer: c 9. which will improve your skill. • In here pump is used for pumping refrigerant absorbant solution, which consumes less power.  In ammonia-water absorption refrigeration system, ammonia is used as the refrigerant, which is easily and cheaply available. • Due to low working pressure the cop of vapour refrigeration is low, it is about 1.1 • High heat rejection system is required, as heat is being rejected from condenser, analyzer, rectifier and absorber. Multiple choice questions on Refrigeration and air conditioning - Set 13 MCQ Refrigeration Edit Practice Test: Question Set - 13. 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. Pick up the wrong statement. These short solved questions or quizzes are provided by Gkseries. The vapour going to condenser is ____ in temperature and ____ in ammonia. d) none of the mentioned du Pont de Nemours & Company. c) absorbent and refrigerant 1. 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. Advantages of using Vapor – Absorption Refrigeration System • As there is no moving part in the entire system, the operation is essentially quite and subjected to a very little wear. However, unlike vapour compression refrigeration systems, the required input to absorption systems is in the form of heat. MCQ important questions || Rgpv online Exams, 1. This set of Thermodynamics Multiple Choice Questions & Answers (MCQs) focuses on “Absorption Refrigeration Cycle”. grade CO2, used as a replacement for R134a and R404A in ultra-low, low and medium temperature. 2.1 Refrigeration and Air Conditioning Interview Questions and Answers pdf:-; 2.2 Refrigeration and Air Conditioning Interview Questions and Answers pdf :- Q2. 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. Freons or halocarbons are synthetically produced. 5. why is an analyser-rectifier combination is used in absorption refrigeration cycle? Q3. Explanation: This is the basic absorption refrigeration cycle. Disadvantages of using Vapor - Absorption Refrigeration System • Set up is too large as it consists of three more equipment those are absorber, generator ,and pump. MCQ-VAPOR ABSORPTION REFRIGERATION. Correct Answer. b) boiling point of ammonia is more than that of water Answer: a Answer: a d) all of the mentioned • Low working pressure. 3. The weak solution absorbs ammonia and gets converted into strong solution. Which type of energy is required to expend in vapour absorption refrigeration system? d) none of the mentioned c. low pressure strong vapour mixture of ammonia and water, d. high pressure strong vapour mixture of ammonia and water. Ans: a 6. What is the process carried out in generator of vapour absorption refrigeration cycle? a) refrigerant  Can work only with thermal energy as an input. (d) … Famous Heat Transfer, Refrigeration and Air Conditioning multiple choice question for Technology associate engineering and vocational training institute students to give a job exam. Explanation: In this, water is the refrigerant and solution of lithium bromide in water is the absorbent. 3. control requirements favor absorption system. or 3 fluid refrigeration? c) both condense at same temperature Working of Simple Vapor absorption system: A Simple Vapor absorption system consists of evaporator, absorber, generator, condenser, expansion valve, pump & reducing valve. In this system, the working substance is a refrigerant like NH 3, R-11, R-12.. b) to decrease the amount of water vapour in ammonia vapour Refrigeration & Air-Conditioning MCQ Question with Answer Refrigeration & Air-Conditioning MCQ with detailed explanation for interview, entrance and competitive exams. c) both of the mentioned a) to increase the amount of water vapour in ammonia vapour Wet compression is _____. Friday, May 27, 2016. b) false applications. Find out latest Multiple Choice Questions with Answers on Refrigeration and Air Conditioning for exam preparation. The vapour absorption refrigeration system is, a. more noisy than the vapour compression refrigeration system, b. more silent than the vapour compression refrigeration system, c. equally noisy as the vapour compression refrigeration system, ANSWER: b. more silent than the vapour compression refrigeration system, Q11. What is the value of the … The boiling point of ammonia is (A) -10.5°C (B) -30°C (C) -33.3°C (D) -77.7°C. a. it makes ammonia-water solution strong, b. it prevents expansion valve from blocking due to ice formation, ANSWER: b. it prevents expansion valve from blocking due to ice formation, Q8. 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