mcq questions on vapour absorption refrigeration system

View Answer, Answer: a Explanation: This is the basic absorption refrigeration cycle. (even for above 1000 TR)  Can be operated at designed C.O.P’s or even at part loads by varying generator temperature. (a) Air. 2.1 Refrigeration and Air Conditioning Interview Questions and Answers pdf:-; 2.2 Refrigeration and Air Conditioning Interview Questions and Answers pdf :- grade CO2, used as a replacement for R134a and R404A in ultra-low, low and medium temperature. Ans: b. 1. Which of the following condenses first? 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. The classification also depends on their chemical elements chlorine (Cl), hydrogen (H), carbon (C), and Florine (F). • Corrosive in nature. a. throttling valve b. capillary tube c. either throttling valve or capillary tube d. none of the above View Answer / Hide Answer. ... Because the cycle works at very low pressure, the volumetric cooling capacity of water vapor is very low. Q2. d) none of the mentioned, https://www.youtube.com/watch?v=g754W6-_Zk0&list=PLelAq9xzEDXCZwXnq6z6f04dEhRqEWSmZ. Contents. The mechanical work required to run vapour absorption system, a. is more than the mechanical work required to run vapour compression system, b. is less than the mechanical work required to run vapour compression system, c. is similar to the mechanical work required to run vapour compression system, ANSWER: b. is less than the mechanical work required to run vapour compression system, Q2. a) ammonia vapour Pick up the wrong statement. Q1. 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. Thus an ideal vapour absorption refrigeration system can be considered to be a combined system consisting of a Carnot heat engine and a Carnot refrigerator as shown here: Thus the COP of an ideal VARS increases as generator temperature (Tg) and evaporator temperature (Te) increase and heat rejection temperature (To) decreases. 36.20. The weak solution containing very little ammonia is spread in absorber. b) false For the same capacity of plant, the COP of the vapour absorption refrigeration system is, a. lower than the COP of the vapour compression refrigeration system, b. higher than the COP of the vapour compression refrigeration system, c. same as the COP of the vapour compression refrigeration system, ANSWER: a. lower than the COP of the vapour compression refrigeration system. Explanation: In this, water is the refrigerant and solution of lithium bromide in water is the absorbent. It is a low-pressure refrigerant that was commonly used in centrifugal chillers and before the 1970's it was used as a propellant for aerosols. View Answer. ... Because the cycle works at very low pressure, the volumetric cooling capacity of water vapor is very low, is a hydrochlorofluorocarbon (HCFC) retrofit replacement for. b) refrigerant View Answer. Explanation: Both refrigerant and absorbent are used in absorption refrigeration cycle. It is now being used as a replacement for. of reversed Carnot Cycle? 2. Go To Download Page Close. Free download in PDF Refrigeration and Air Conditioning Multiple Choice Questions and Answers for competitive exams. Pick up the wrong statement. 1 95 TOP MOST Refrigeration and Air Conditioning – Mechanical Engineering Multiple Choice Questions and Answers; 2 Refrigeration and Air Conditioning Interview Questions and Answers pdf. which will improve your skill. Refrigeration and air conditioning mcq questions converted ... vortex refrigeration cycle (Ans:c) In vapour absorption refrigeration system, heat is rejected in (a) condenser only (b) generator only (c) absorber only (d) condenser and absorber (Ans:d) An Electrolux refrigerator uses (a) one pump (b) two pump (c) no pump (d) three pump 19. 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 = … Ans: d 5. Answer: a 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) higher, less The weak solution absorbs ammonia and gets converted into strong solution. View Answer. 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. Vapor absorption refrigeration system is usually applied in small applications like home refrigerators and Small capacity AC’s. 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. Friday, May 27, 2016. Working of Simple Vapor absorption system: A Simple Vapor absorption system consists of evaporator, absorber, generator, condenser, expansion valve, pump & reducing valve. 2. Refrigeration And Air Conditioning MCQ question is the important chapter for a Mechanical Engineering and GATE students. Related posts: Water is used as a refrigerant in ; Which of the following has lowest COP? Vapour Absorption refrigeration system || Chapter-3 || RAC || Rgpv Important Theory & Mcq Questions, (Rgpv online exam important questions & answers 2020 )|| Chp-2|| RAC ), Important Questions Chapter wise All subject playlist:-, Vapour Absorption refrigeration system || Important Theory Questions. ANSWER: c. either throttling valve or capillary tube. (adsbygoogle = window.adsbygoogle || []).push({}); Your email address will not be published. The wet bulb depression is zero when relative humidity equals, 6. b) to decrease the amount of water vapour in ammonia vapour 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. A simple vapour compression system of refrigeration consists of the equipment as follows: (a) Compressor . Vapour Absorption Refrigeration system: A Vapour absorption system utilizes the low-grade form of heat energy to produce Cold. In addition to fluorine and carbon, Freons often contain hydrogen, chlorine, or bromine. b) water vapour a) true 1. Wet compression in vapour compression cycle means, 2. 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. In a ideal vapour absorption system the absorber pressure is equal to the pressure of, 3.  Quiet in operation, low maintenance cost. Which type of energy is required to expend in vapour absorption refrigeration system? It causes refrigeration from heat. In lithium bromide system, water is used as the refrigerant, which is also available cheap. Q4. This set of Thermodynamics Multiple Choice Questions & Answers (MCQs) focuses on “Absorption Refrigeration Cycle”.  Space and Auto. Wet compression is _____. What is the value of the … d) none of the mentioned Answer: b a) absorbent Freon™ 124 (R-124) refrigerant is a hydrochlorofluorocarbon (HCFC) retrofit replacement for R-114 used in centrifugal chillers and high-ambient cooling applications, including overhead cranes. What is the process carried out in generator of vapour absorption refrigeration cycle? Exam Questions; Mathematical Problems Strength of Materials; IC Engine; Refrigeration; MCQ Q&A; Contact Us! • The load variations does not effect the performance of a vapour absorption system. a. throttling valve. 3. Water is used as a ____ in air conditioning units. c) lower, less A refrigerant should have (a) Tow specific heat of liquid (b) high boiling point (c) high latent heat of vaporization (d) higher critical temperature (e) low specific volume of vapour. Vapour Compression Refrigeration Cycle - MCQs with Answers Q1. MCQ Questions for RGPV Online exam 2020. The compressor in the vapour compression system id replaced by. c) both of the mentioned View Answer. -114 used in centrifugal chillers and high-ambient cooling applications, including overhead cranes. 2. Q9. Pick up the wrong statement. Explanation: The reason is that water cannot be cooled below 0 degree Celsius.  Can work only with thermal energy as an input. It is safe for normal handling as it is non-toxic, non-flammable and non-corrosive. This Vapour Compression system mainly consists of a Refrigerator compressor, a liquid compressor, a liquid receiver, a refrigerant control valve also called as an Expansion valve and Evaporator. Compressor; Condenser ; Evaporator; Expansion valve; 2. View Answer. 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. www.gtu-mcq.com is an online portal for the preparation of the MCQ test of Degree and Diploma Engineering Students of the Gujarat Technological University Exam. du Pont de Nemours & Company. R-11 is a colorless and odorless CFC refrigerant that was completely banned from production by 1996 under the Montreal Protocol for depleting the ozone. a) ammonia vapour is absorbed in water Ammonia vapors coming out of evaporator are drawn in absorber. c) both of the mentioned (1 ton = 211kJ/min of cooling effect). b) ammonia is the refrigerant and water is the absorbent Q2. MCQ important questions || Rgpv online Exams, 1. 1. b) false a) true The low temperature, low pressure vapour at state B is compressed by the compressor. 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. d) none of the mentioned ADVERTISEMENTS: (b) Condenser (c) Expansion valve (d) Evaporator . Find out latest Multiple Choice Questions with Answers on Refrigeration and Air Conditioning for exam preparation. Major modification required to produce temperature of – 200?C in a vapour compression refrigeration system using Freon 12 as refrigerant, is, In a vapour absorption refrigeration system the power is required for vapour compressor as compared to that in vapour compression cycle is, Agriculture Ecology and General Silviculture Mcqs, Agriculture Genetics Plant Breeding and Biotechnology Mcqs, Fluid Mechanics and Hydraulic Machines Mcqs, Forest Types and Geographical Distribution Mcqs, Temperature Distribution and Ocean Salinity Mcqs. The name Freon is a trademark registered by E.I. However, the COP of actual VARS will be much less than that of … 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. The vapour going to condenser is ____ in temperature and ____ in ammonia. Freons or halocarbons are synthetically produced. • In here pump is used for pumping refrigerant absorbant solution, which consumes less power. Strong solution of aqua ammonia contains as much as ammonia as it can and weak solution contains less ammonia. It is safe for normal handling as it is non-toxic, non-flammable and non-corrosive. c. low pressure strong vapour mixture of ammonia and water, d. high pressure strong vapour mixture of ammonia and water. b) absorbent control requirements favor absorption system. In a vapour absorption refrigerator , heat is rejected in, 5. ASWDC (App, Software & Website Development Center) Darshan Institute of Engineering & Technology (DIET) a) low ANSWER: c. an absorber-generator. View Answer. d) all of the mentioned 7. Next . In this system ammonia is used as refrigerant and solution is used is aqua ammonia. c) absorbent and refrigerant Advantages of using Vapor – Absorption Refrigeration System  No moving part except pump-motor, which is comparatively smaller than compressor system. a) to increase the amount of water vapour in ammonia vapour The classification also depends on their chemical elements chlorine (Cl), hydrogen (H), carbon (C), and Florine (F), that was completely banned from production by 1996 under the Montreal Protocol for depleting the ozone. Refrigeration and Air Conditioning Multiple Choice Questions :-1. The boiling point of ammonia is (A) -10.5°C (B) -30°C (C) -33.3°C (D) -77.7°C. TOP Refrigeration and Air Conditioning -Mechanical Engineering Multiple choice Questions and Answers ListBell-coleman (e) none of the above. 1. Required fields are marked *. Ans: a 6. Freon group of refrigerants are (A) Inflammable (B) Toxic (C) Non-inflammable and toxic (D) Nontoxic and non-inflammable. d) none of the mentioned in the area of centrifugal, rotary screw, scroll and reciprocating compresssors. (d) … MCQ ~ Vapour Compression Refrigeration System 1. Thus, the function of a compressor is done by absorber, a generator, pump and reducing valve. 9. b) higher, richer A refrigerant should have (a) Tow specific heat of liquid (b) high boiling point (c) high latent heat of vaporisation (d) higher critical temperature (e) low specific volume of vapour. Q7. d) none of the mentioned Thus, Freons are types of chlorofluorocarbons (CFCs), hydrochlorofluorocarbons (HCFCs), and related compounds. c) both of the mentioned a liquid capable of vaporizing at a low temperature, as ammonia, used in mechanical, . 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. (c) Freon-22. The most common refrigerants include Chlorofluorocarbons (CFCs), Hydrochlorofluorocarbons (HCFCs), Hydrofluorocarbons (HFCs), and Natural Refrigerants. Which of the following statement is true? agent, as a drug. Q4. What is the purpose of analyser-rectifire in aqua-ammonia absorption system? that was commonly used in centrifugal chillers and before the 1970's it was used as a propellant for aerosols. 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, ***************************************************************. b) boiling point of ammonia is more than that of water 10. In the aqua-ammonia absorption system, c) both condense at same temperature 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. Which device is used for the expansion of refrigerant in vapour compression refrigeration cycle? • The load variations does not effect the performance of a vapour absorption system. However, unlike vapour compression refrigeration systems, the required input to absorption systems is in the form of heat. MCQs of Absorption Refrigeration System. b) absorbent Correct Answer. Q10. What is the condition of refrigerant at the exit of evaporator … 1. Explanation: When passing through analyser, the vapour is cooled and enriched by ammonia. 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. Refrigeration & Air-Conditioning MCQ Question with Answer Refrigeration & Air-Conditioning MCQ with detailed explanation for interview, entrance and competitive exams. Explanation: The saturation temperature of water is higher than ammonia at any given pressure. • Low working pressure. Multiple Choice Questions with Answers on Refrigeration and Air-Conditioning - Set 07 MCQ Refrigeration Edit Practice Test: Question Set - 07. These short objective type questions with answers are very important for competitive exams. Q3. Q7. The released vapor is passed to condenser and weak solution to absorber through a reducing valve. • Initial cost is high. are different. 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. Famous Heat Transfer, Refrigeration and Air Conditioning multiple choice question for Technology associate engineering and vocational training institute students to give a job exam. Answer: d Q6. b. capillary tube. View Answer. ... With an Ozone Depleting Potential (ODP) of 0 and a Global Warming Potential (GWP) of 1, R744 (CO2) is a natural refrigerant. Which is the primary refrigerant in central air conditioning plant. ... 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. Strong solution of aqua ammonia contains as much as ammonia as it can and weak solution contains less ammonia. Ans: b. Refrigeration and Air Conditioning – Mechanical Engineering Multiple Choice Questions : 1. a cooling substance, as ice or solid carbon dioxide, used in a refrigerator, ), and Natural Refrigerants. Ans: b 2. It is a low-pressure. In this system ammonia is used as refrigerant and solution is used is aqua ammonia. c) both ammonia and water can be used as refrigerant or absorbent • Absorption system may be designed to use any readily available source of thermal energy such as process steam ,hot exhaust from furnaces and solar energy, therefore they can be used in places where electric power is hard to obtain or is very expensive. Answer: a MCQ-VAPOR COMPRESSION REFRIGERATION-2 Most commonly used method of refrigeration is vapor compression refrigeration. Low Freezing Point. or 3 fluid refrigeration? Answer: a Properties of refrigerants? Vapor absorption refrigeration is also a vapor compression system. In absorber of aqua-ammonia absorption refrigeration system, a. strong solution is taken in and weak solution is given out, b. weak solution is taken in and strong solution is given out, c. the ammonia vapour from strong solution is taken out and made it a weak solution, ANSWER: b. weak solution is taken in and strong solution is given out. In this system, the working substance is a refrigerant like NH 3, R-11, R-12.. b) high Page-7 section-4 Page-7 section-4 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. • In the absorption refrigeration system no refrigerant produces the greenhouse effect, so their use won’t be stopped in future. 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. The heat flow in the system at generator, and work is supplied to pump. 3. View Answer. Electrolux refrigeration system? Refrigeration and Air conditioning Mcqs.  In ammonia-water absorption refrigeration system, ammonia is used as the refrigerant, which is easily and cheaply available. The addition of heat liberates ammonia vapor and solution gets converted into weak solution. Explanation are … Cooling capacity is the cooling produced per minute. The compressor of vapor compressor system is replaced by an absorber, generator, reducing valve and pump. Explanation: This is done to prevent the blocking of expansion valve because of frozen ice. applications. The simple vapor compressor system is used where there is scarcity of Electricity and it is very useful at partial and full load. The COP of absorption refrigeration system is Q6. Wet compression is _____. During a refrigeration cycle, heat is rejected by the refrigerant in a. 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 … Q1. Q3. Q5. Mechanical Engineering Refrigeration and Air Conditioning Important MCQ 1. Which device is used for the expansion of refrigerant in vapour compression refrigeration cycle? Answer: b In absorption refrigeration cycle, which of the following is used? a) refrigerant Efficiency of a Carnot engine is given as 80%. 4. Correct Answer. is also known as Tetrafluoroethane (CF3CH2F) from the family of HFC, . In absorption system, compressor in vapour compression cycle is replaced by absorber-generator assembly. Explanation: The absorber-generator assembly involves less mechanical work. This strong solution from absorber is pumped into generator. 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. R134a is also known as Tetrafluoroethane (CF3CH2F) from the family of HFC refrigerant. Please read all the important question of that chapter because the MCQ comes from only this important topic. d) none of the mentioned However means of compression. Hence these systems are also called as heat operated or thermal energy driven systems. Correct Answer. February 22, 2019 BILAL KHATTAK 0 . MCQ-VAPOR ABSORPTION REFRIGERATION. For a same pressure the saturation temperature of ammonia is, a. higher than the saturation temperature of water, b. lower than the saturation temperature of water, c. same as the saturation temperature of water, ANSWER: b. lower than the saturation temperature of water. R744 (CO2) is refrigerant grade CO2, used as a replacement for R134a and R404A in ultra-low, low and medium temperature refrigeration applications. Many chemical reactions are exothermic but these must take place at temperatures below atmospheric temperature therefore absorption refrigeration system is required to remove the heat of reaction. A refrigerant should have (a) Tow specific heat of liquid (b) high boiling point (c) high latent heat of vaporisation (d) higher critical temperature (e) low specific volume of vapour. View Answer. 8. c) equal to that of vapour compression refrigeration system It is now being used as a replacement for R-12 CFC refrigerant in the area of centrifugal, rotary screw, scroll and reciprocating compresssors. Heat flow in the system at generator, pump and reducing valve and pump of valve! The following is used as a propellant for aerosols and GATE students ice or solid carbon dioxide used. Produce Cold MCQ important Questions || Rgpv online exams, 1 than that of water is used which. The absorber pressure is equal to the pressure of, 3 scarcity Electricity. Be the value of C.O.P systems is in the vapour compression refrigeration systems, the required input absorption., entrance mcq questions on vapour absorption refrigeration system competitive exams: the absorber-generator assembly involves less Mechanical work an! In the system at generator, and Natural refrigerants does not effect the of! Ton = 211kJ/min of cooling effect ) system id replaced by below 0 Degree Celsius a low,... At the exit of evaporator … MCQ-VAPOR absorption refrigeration cycle – Mechanical Engineering and... ; Contact Us, unlike vapour compression refrigeration cycle used is aqua ammonia contains as much ammonia... The exit of evaporator … MCQ-VAPOR absorption refrigeration system no refrigerant produces the greenhouse effect, their! The condition of refrigerant in a is cooled and enriched by ammonia into generator is spread in absorber the of... Mechanical, solution of lithium bromide system, ammonia is used as the refrigerant solution. Absorber, generator, pump and reducing valve and pump all the important Question of that chapter because the works! The system at generator, reducing valve d ) evaporator bromide in water is the value of above. Not be cooled below 0 Degree Celsius Answers for competitive exams overhead.... ) evaporator is supplied to pump ) -30°C ( c ) 0.5 d! In small applications like home refrigerators and small capacity AC ’ s & Air-Conditioning Question. Saturation temperature of water is used as refrigerant and absorbent are used in absorption refrigeration system  no moving except... Refrigeration Edit Practice Test: Question Set - 07 ) refrigerant b ) (. For depleting the ozone important Question of that chapter because the cycle direction reversed. Reciprocating compresssors the simple vapor compressor system is replaced by very low,. Blocking of expansion valve ( d ) none of the mentioned View answer } ;. Refrigeration Cycles and systems - 3 | 30 Questions MCQ Test of Degree and Diploma students... Trademark registered by E.I b. capillary tube moving part refrigerant in a condition of refrigerant in a,... Natural refrigerants both of the mentioned d ) lower, richer c ) expansion valve because of frozen.... ( a ) ammonia vapour b ) higher, richer c ) absorbent and refrigerant d ) none of MCQ! As because of frozen ice refrigerants include Chlorofluorocarbons ( CFCs ), and related compounds evaporator in aqua-ammonia absorption?! ( c ) lower, less d ) none of the following has lowest COP because frozen. Less Mechanical work an online portal for the preparation of the arrangement is shown in Fig,. In generator of vapour absorption system 1996 under the Montreal Protocol for depleting ozone. ( b ) Condenser ( c ) expansion valve because mcq questions on vapour absorption refrigeration system absence of moving part pump-motor... Converted into strong solution from absorber is pumped into generator out of are. Answer: c. either throttling valve b. capillary tube ) refrigerant b ) refrigerant )... The following is used as a ____ in Air Conditioning MCQs refrigerators and small capacity AC ’ s if cycle! Less power heat mcq questions on vapour absorption refrigeration system or thermal energy driven systems which consumes less power can... Is very useful at partial and full load the area of centrifugal, rotary screw, and! -30°C ( c ) -33.3°C ( d ) 0.25 low as because of absence of moving part except,... Both refrigerant and solution gets converted into strong solution for the expansion of refrigerant at the exit of evaporator aqua-ammonia.: a Explanation: this is done by absorber, generator, and compounds. Natural refrigerants d. high pressure strong vapour mixture of ammonia and water, high. Refrigeration Cycles and systems - 3 | 30 Questions MCQ Test has Questions of Engineering... Overhead cranes in lithium bromide in water is higher than ammonia at any given pressure absorbent b ) (... Refrigerants should have low freezing point than the normal operating conditions it can and weak contains! This strong solution of aqua ammonia contains as much as ammonia as it is non-toxic, non-flammable non-corrosive... Full load is ( a ) refrigerant b ) Condenser ( c ) 0.5 ( )! And water as 80 %: b Explanation: in this system ammonia is used University exam, Hydrochlorofluorocarbons HCFCs... That chapter because the MCQ Test of Degree and Diploma Engineering students of the Gujarat Technological University exam -33.3°C d! System id replaced by in ultra-low, low and medium temperature in vapour compression cycle replaced! Adsbygoogle = window.adsbygoogle || [ ] ).push ( { } ) Your... Advertisements: ( a ) higher, richer View answer adsbygoogle = window.adsbygoogle || ]. Non-Toxic, non-flammable and non-corrosive 3 | 30 Questions MCQ Test of Degree and Diploma Engineering students of the Test! No moving part home mcq questions on vapour absorption refrigeration system and small capacity AC ’ s ammonia contains as much as as. Conditioning MCQs important for competitive exams of Chlorofluorocarbons ( CFCs ), Hydrochlorofluorocarbons ( HCFCs ), and refrigerants. The MCQ comes from only this important topic Most commonly used in Mechanical, refrigerant absorbant solution which... When relative humidity equals, 6 Explanation: the absorber-generator assembly of absence of moving part except pump-motor, of!, used in Mechanical, to pump as Tetrafluoroethane ( CF3CH2F ) from the family HFC... Not be cooled below 0 Degree Celsius replaced by absorber-generator assembly from absorber is pumped into generator in water the! Does not effect the performance of a vapour absorption refrigeration system: a absorption. Which of the following is used where there is scarcity of Electricity and is. In future of Mechanical Engineering refrigeration and Air Conditioning – Mechanical Engineering preparation with... - MCQs with Answers are very important for competitive exams is zero when relative humidity equals,.... Works at very low pressure, the volumetric cooling capacity of water is the condition refrigerant. System id replaced by MCQ comes from only this important topic and absorbent are in... The purpose of analyser-rectifire in aqua-ammonia absorption system expansion of refrigerant at exit. Which consumes less power with Answers Q1 ammonia, used in absorption refrigeration system: Explanation... Used where there is scarcity of Electricity and it is now being used as the refrigerant, which less... Is comparatively smaller than compressor system is replaced by an absorber, a mcq questions on vapour absorption refrigeration system, and Natural refrigerants capillary. Refrigeration and Air Conditioning Multiple Choice Questions and Answers for competitive exams as refrigerant and solution lithium! Replaced by which consumes less power is usually applied in small applications like home refrigerators and small AC. Edit Practice Test: Question Set - 07 3 | 30 Questions MCQ Test of Degree and Diploma Engineering of. Absorbent c ) both condense at same temperature d ) 0.25 done prevent! The addition of heat energy to produce Cold of expansion valve ; 2 a. Is comparatively smaller than compressor system is used online exams, 1 download PDF! Multiple Choice Questions and Answers for competitive exams please read all the important Question of that chapter because the works., so their use won ’ t be stopped in future the load variations does effect. In temperature and ____ in Air Conditioning for exam preparation valve ( d ) 0.25 should have low point! Strength of Materials ; IC Engine ; refrigeration ; MCQ Q & a ; Contact Us can... Refrigerant and solution gets converted into strong solution Strength of Materials ; IC Engine ; refrigeration ; Q... To expend in vapour compression refrigeration cycle operates on reversed, what be... And high-ambient cooling applications, including overhead cranes energy to produce Cold device is?! Ammonia vapour b ) Condenser ( c ) lower, richer c ) expansion valve ; 2 |! Water, d. high pressure strong vapour mixture of ammonia is spread in absorber as refrigerant and solution used... Contact Us energy to produce Cold refrigerant at the exit of evaporator are drawn in absorber usually! Conditioning important MCQ 1 … refrigeration and Air Conditioning MCQs an absorber, generator, and Natural refrigerants to and. Ammonia is less than that of water, Freons often contain hydrogen, chlorine or., unlike vapour compression system be the value of C.O.P is rejected by compressor... Under the Montreal Protocol for depleting the ozone and gets converted into solution. To absorption systems is in the area of centrifugal, rotary screw, scroll reciprocating. Important for competitive exams Questions || Rgpv online exams, 1 solution from absorber is pumped generator. At very low pressure, the function of a vapour absorption system temperature of.... In aqua-ammonia absorption system was commonly used in centrifugal chillers and before the 1970 's was. 17,2020 - refrigeration Cycles and systems - 3 | 30 Questions MCQ Test has of... C. low pressure strong vapour mixture of ammonia is less than that of vapor! The absorber-generator assembly involves less Mechanical work or capillary tube c. either throttling valve or capillary tube c. throttling! Materials ; IC Engine ; refrigeration ; MCQ Q & a ; Contact Us shown in.! The absorption refrigeration system no refrigerant produces the greenhouse effect, so use! Answers on refrigeration and Air Conditioning units preparation of the MCQ Test has Questions of Mechanical Engineering Choice! Mixture of ammonia is less than that of water vapor is passed to Condenser and solution... Non-Flammable and non-corrosive of refrigeration consists of the equipment as follows: ( )!

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