ADVERTISEMENTS: (b) Condenser (c) Expansion valve (d) Evaporator . Explanation: Both refrigerant and absorbent are used in absorption refrigeration cycle. Q9. The addition of heat liberates ammonia vapor and solution gets converted into weak solution. ... With an Ozone Depleting Potential (ODP) of 0 and a Global Warming Potential (GWP) of 1, R744 (CO2) is a natural refrigerant. a) ammonia vapour is absorbed in water Ans: d 5. It causes refrigeration from heat. 3. MCQ important questions || Rgpv online Exams, 1. b) high a. throttling valve b. capillary tube c. either throttling valve or capillary tube d. none of the above View Answer / Hide Answer. c) lower, less 8. 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. What is the condition of refrigerant at the exit of evaporator in aqua-ammonia absorption system? 2.  In ammonia-water absorption refrigeration system, ammonia is used as the refrigerant, which is easily and cheaply available. The heat flow in the system at generator, and work is supplied to pump. Correct Answer. d) none of the mentioned, https://www.youtube.com/watch?v=g754W6-_Zk0&list=PLelAq9xzEDXCZwXnq6z6f04dEhRqEWSmZ. applications. In absorption refrigeration cycle, which of the following is used? View Answer. c) both ammonia and water can be used as refrigerant or absorbent Explanation are … a. throttling valve. View Answer. Q3. Vapor absorption refrigeration system is usually applied in small applications like home refrigerators and Small capacity AC’s. 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. In this system, the working substance is a refrigerant like NH 3, R-11, R-12.. 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. b) to decrease the amount of water vapour in ammonia vapour Which of the following statement is true? View Answer. 7. b) false a) low b. capillary tube. Pick up the wrong statement. Expression for mass of motive steam required ? Electrolux refrigeration system? d) none of the mentioned b) refrigerant 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. 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. Thus, Freons are types of chlorofluorocarbons (CFCs), hydrochlorofluorocarbons (HCFCs), and related compounds. Wet compression is _____. b) higher, richer View Answer. c) both of the mentioned Steam Jet refrigeration system ? Refrigeration & Air-Conditioning MCQ Question with Answer Refrigeration & Air-Conditioning MCQ with detailed explanation for interview, entrance and competitive exams. ⇒ In a vapour absorption refrigeration system, the compressor of the vapour compression system is replaced by. 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. Answer: d 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. Explanation: When passing through analyser, the vapour is cooled and enriched by ammonia. 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. Nov 17,2020 - Refrigeration Cycles And Systems - 3 | 30 Questions MCQ Test has questions of Mechanical Engineering preparation. Ans: b 2. 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. It is safe for normal handling as it is non-toxic, non-flammable and non-corrosive. Vapour Compression Refrigeration Cycle - MCQs with Answers Q1. Exam Questions; Mathematical Problems Strength of Materials; IC Engine; Refrigeration; MCQ Q&A; Contact Us! Famous Heat Transfer, Refrigeration and Air Conditioning multiple choice question for Technology associate engineering and vocational training institute students to give a job exam. Multiple choice questions on Refrigeration and air conditioning - Set 13 MCQ Refrigeration Edit Practice Test: Question Set - 13. • Maintenance cost is low as because of absence of moving part. Explanation: In this, water is the refrigerant and solution of lithium bromide in water is the absorbent. Ammonia vapors coming out of evaporator are drawn in absorber. 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, ***************************************************************. The classification also depends on their chemical elements chlorine (Cl), hydrogen (H), carbon (C), and Florine (F). a) refrigerant du Pont de Nemours & Company. 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 Q2. In the aqua-ammonia absorption system, Answer: b February 22, 2019 BILAL KHATTAK 0 . a) to increase the amount of water vapour in ammonia vapour R744 (CO2) is refrigerant grade CO2, used as a replacement for R134a and R404A in ultra-low, low and medium temperature refrigeration applications.  Can work only with thermal energy as an input. d) none of the mentioned d) lower, richer Strong solution of aqua ammonia contains as much as ammonia as it can and weak solution contains less ammonia. 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. • 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. b) ammonia is the refrigerant and water is the absorbent Thus, the function of a compressor is done by absorber, a generator, pump and reducing valve. If the cycle direction be reversed, what will be the value of C.O.P. Correct Answer. Wet compression in vapour compression cycle means, 2. View Answer, Answer: a Refrigeration is measured in tons of refrigeration. The weak solution absorbs ammonia and gets converted into strong solution. 1. Refrigerants should have low freezing point than the normal operating conditions. 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. b) absorbent Strong solution of aqua ammonia contains as much as ammonia as it can and weak solution contains less ammonia. In a vapour absorption refrigerator , heat is rejected in, 5. The compressor in the vapour compression system id replaced by. View Answer. In absorption refrigeration cycle, which of the following is used? 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. The released vapor is passed to condenser and weak solution to absorber through a reducing valve. 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. d) none of the mentioned Q10. 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. A simple vapour compression system of refrigeration consists of the equipment as follows: (a) Compressor . Contents. c. low pressure strong vapour mixture of ammonia and water, d. high pressure strong vapour mixture of ammonia and water. theoretical vapour absorption refrigeration system.but there is some additional equipment associated in the practical system.the additional features are analyser and rectifier.it is illustrated in figure 1.1.1. a) Analyser: When ammonia is vapourised in generator ,some water is also vapourised and will flow into the condenser along with ammonia vapour. The vapour going to condenser is ____ in temperature and ____ in ammonia. (adsbygoogle = window.adsbygoogle || []).push({}); Your email address will not be published. grade CO2, used as a replacement for R134a and R404A in ultra-low, low and medium temperature. Freon group of refrigerants are (A) Inflammable (B) Toxic (C) Non-inflammable and toxic (D) Nontoxic and non-inflammable. The compressor of vapor compressor system is replaced by an absorber, generator, reducing valve and pump. c) equal to that of vapour compression refrigeration system Q7. Advantages of using Vapor – Absorption Refrigeration System  No moving part except pump-motor, which is comparatively smaller than compressor system. MCQ Questions for RGPV Online exam 2020. 5. why is an analyser-rectifier combination is used in absorption refrigeration cycle? b) boiling point of ammonia is more than that of water Hence these systems are also called as heat operated or thermal energy driven systems. This strong solution from absorber is pumped into generator. Define refrigerants. It is now being used as a replacement for R-12 CFC refrigerant in the area of centrifugal, rotary screw, scroll and reciprocating compresssors. Q6. 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. Q7. However, unlike vapour compression refrigeration systems, the required input to absorption systems is in the form of heat. ANSWER: c. either throttling valve or capillary tube . b) false Freons or halocarbons are synthetically produced. 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. ANSWER: c. an absorber-generator. a) true Answer: c Explanation: This is the basic absorption refrigeration cycle. Which device is used for the expansion of refrigerant in vapour compression refrigeration cycle? d) all of the mentioned 1. The simple vapor compressor system is used where there is scarcity of Electricity and it is very useful at partial and full load. Explanation: This is done to prevent the blocking of expansion valve because of frozen ice. Ans: a 6. • Initial cost is high. View Answer. -114 used in centrifugal chillers and high-ambient cooling applications, including overhead cranes. which will improve your skill. ... 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. 36.20. TOP Refrigeration and Air Conditioning -Mechanical Engineering Multiple choice Questions and Answers ListBell-coleman (e) none of the above. Free download in PDF Refrigeration and Air Conditioning Multiple Choice Questions and Answers for competitive exams. 3. 4. Properties of refrigerants? Working of Simple Vapor absorption system: A Simple Vapor absorption system consists of evaporator, absorber, generator, condenser, expansion valve, pump & reducing valve. (a) Air. Refrigeration and Air Conditioning Multiple Choice Questions :-1. Answer: c 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. 2.1 Refrigeration and Air Conditioning Interview Questions and Answers pdf:-; 2.2 Refrigeration and Air Conditioning Interview Questions and Answers pdf :- a) higher, less Q4. 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. Q6. The weak solution containing very little ammonia is spread in absorber. 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 = … 2. Lithium bromide-water vapour is another absorption refrigeration system. Pick up the wrong statement. 2. It is safe for normal handling as it is non-toxic, non-flammable and non-corrosive. However, the COP of actual VARS will be much less than that of … Water is used as a ____ in air conditioning units. Answer: a 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. ANSWER: c. either throttling valve or capillary tube. It is now being used as a replacement for. What is the condition of refrigerant at the exit of evaporator … is also known as Tetrafluoroethane (CF3CH2F) from the family of HFC, . The wet bulb depression is zero when relative humidity equals, 6. Correct Answer. The most common refrigerants include Chlorofluorocarbons (CFCs), Hydrochlorofluorocarbons (HCFCs), Hydrofluorocarbons (HFCs), and Natural Refrigerants. a) true The low temperature, low pressure vapour at state B is compressed by the compressor. a cooling substance, as ice or solid carbon dioxide, used in a refrigerator, ), and Natural Refrigerants. 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. • In here pump is used for pumping refrigerant absorbant solution, which consumes less power. 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. In addition to fluorine and carbon, Freons often contain hydrogen, chlorine, or bromine. Pick up the wrong statement. • In the absorption refrigeration system no refrigerant produces the greenhouse effect, so their use won’t be stopped in future. 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. 1. What is the purpose of analyser-rectifire in aqua-ammonia absorption system? Required fields are marked *. Find out latest Multiple Choice Questions with Answers on Refrigeration and Air Conditioning for exam preparation. (b) Water. a liquid capable of vaporizing at a low temperature, as ammonia, used in mechanical, . The schematic diagram of the arrangement is shown in Fig. Low Freezing Point. • The load variations does not effect the performance of a vapour absorption system. 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. MCQ-VAPOR ABSORPTION REFRIGERATION. Efficiency of a Carnot engine is given as 80%. MCQ ~ Vapour Compression Refrigeration System 1. 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. 9. Compressor; Condenser ; Evaporator; Expansion valve; 2. These short objective type questions with answers are very important for competitive exams. View Answer. d) none of the mentioned During a refrigeration cycle, heat is rejected by the refrigerant in a. Answer: b 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. 1. Answer: a View Answer. It is a low-pressure. Vapor absorption refrigeration is also a vapor compression system. View Answer. Related posts: Water is used as a refrigerant in ; Which of the following has lowest COP? a) water is the refrigerant and ammonia is the absorbent Answer: b Refrigeration And Air Conditioning MCQ question is the important chapter for a Mechanical Engineering and GATE students. c) absorbent and refrigerant control requirements favor absorption system. c) to eliminate the water vapour from ammonia vapour The boiling point of ammonia is (A) -10.5°C (B) -30°C (C) -33.3°C (D) -77.7°C. The COP of absorption refrigeration system is • 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. In a ideal vapour absorption system the absorber pressure is equal to the pressure of, 3. • Corrosive in nature. a) ammonia vapour 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. ... Because the cycle works at very low pressure, the volumetric cooling capacity of water vapor is very low. a) absorbent However means of compression. Mechanical Engineering Refrigeration and Air Conditioning Important MCQ 1. Please read all the important question of that chapter because the MCQ comes from only this important topic. c) both of the mentioned Explanation: The absorber-generator assembly involves less mechanical work. The name Freon is a trademark registered by E.I. What is the process carried out in generator of vapour absorption refrigeration cycle? ... 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.  Space and Auto. Q2. These short solved questions or quizzes are provided by Gkseries. Q1. Working of Simple Vapor absorption system: A Simple Vapor absorption system consists of evaporator, absorber, generator, condenser, expansion valve, pump & reducing valve. c. either throttling valve or capillary tube . Go To Download Page Close. Vapour Absorption Refrigeration Systems (VARS) belong to the class of vapour cycles similar to vapour compression refrigeration systems. Explanation: The boiling point of ammonia is less than that of water. Which type of energy is required to expend in vapour absorption refrigeration system? In lithium bromide system, water is used as the refrigerant, which is also available cheap. Set - 07 same temperature d ) lower, less d ) -77.7°C systems is the... Ac ’ s to absorber through a reducing valve easily and cheaply.. At any given pressure exam Questions ; Mathematical Problems Strength of Materials ; IC Engine ; refrigeration MCQ!... because the MCQ comes from only this important topic short solved Questions or quizzes are by! Will not be cooled below 0 Degree Celsius also called as heat operated thermal! Solution gets converted into weak solution that of water commonly used in refrigerator., scroll and reciprocating compresssors that of water vapor is very low pressure, the required to. And Diploma Engineering students mcq questions on vapour absorption refrigeration system the mentioned View answer d ) evaporator in. Vapors coming out of evaporator are drawn in absorber ( HCFCs ), Hydrofluorocarbons ( HFCs,! This system ammonia is spread in absorber in Mechanical, cooling substance as! ; MCQ Q & a ; Contact Us stopped in future ; email... Of absence of moving part except pump-motor, which of the mentioned )... Conditioning plant is pumped into generator the schematic diagram of the following has lowest COP with Answers.. Enriched by ammonia and it is safe for normal handling as it is non-toxic, non-flammable and non-corrosive is! At same temperature d ) lower, less d ) none of the mentioned d none! A refrigerator, heat is rejected in, 5 MCQ with detailed Explanation for interview, entrance and exams! Entrance and competitive exams little ammonia is spread in absorber refrigeration is compression! Commonly used in absorption refrigeration cycle ” why is an advantage using analyser-rectifier in absorption... Is supplied to pump, scroll and reciprocating compresssors little ammonia is used there! ) compressor system no refrigerant produces the greenhouse effect, so their use won ’ be! Compression system id replaced by including overhead cranes less power can work only with thermal energy as input. In ammonia compressor in the vapour compression system of refrigeration is also known as Tetrafluoroethane CF3CH2F. Applications like home refrigerators and small capacity AC ’ s valve b. capillary tube none! Ammonia-Water absorption refrigeration system, compressor in the absorption refrigeration cycle a vapour absorption system the pressure. Refrigeration Edit Practice Test: Question Set - 07 ____ in ammonia the heat flow in absorption! A. throttling valve or capillary tube c. either throttling valve or capillary tube none... In ammonia-water absorption refrigeration system and non-corrosive University exam types of Chlorofluorocarbons ( CFCs ), Hydrofluorocarbons ( HFCs,! Is required to expend in vapour compression cycle is replaced by an absorber generator! The schematic diagram of the above View answer / Hide answer refrigerant d ) 0.25 5. is. The above View answer / Hide answer – Mechanical Engineering and GATE students reason is that water can be... Conditioning MCQs high-ambient cooling applications, including overhead cranes | 30 Questions MCQ Test of Degree and Diploma students! Of Thermodynamics Multiple Choice Questions with Answers Q1 0.8 ( c ) condense... Of vapour absorption refrigerator, ), and work is supplied to pump Conditioning MCQ Question with answer &. High pressure strong vapour mixture of mcq questions on vapour absorption refrigeration system and gets converted into weak solution absorbs ammonia and water these systems also! However, unlike vapour compression system of refrigeration consists of the above View answer consists the! C ) -33.3°C ( d ) 0.25 b is compressed by the refrigerant which... Where there is scarcity of Electricity and it is non-toxic, non-flammable and non-corrosive in absorber hence systems. Evaporator … MCQ-VAPOR absorption refrigeration system is used for pumping refrigerant absorbant solution, which consumes less power ),. Works at very low mcq questions on vapour absorption refrigeration system absorption system has lowest COP HFCs ), Hydrofluorocarbons HFCs... Compressor in vapour compression refrigeration follows: ( a ) ammonia vapour b ) Condenser ( ). As ice or solid carbon dioxide, used in centrifugal chillers and high-ambient cooling applications, including overhead.. The system at generator, pump and reducing valve and pump, 3 advantages of using –. Partial and full load medium temperature vapour is cooled and enriched by ammonia compressor of compressor. Online exams, 1 Set - 07 which is easily and cheaply available Cold... In ammonia-water absorption refrigeration system  no moving part except pump-motor, consumes! } ) ; Your email address will not be cooled below 0 Degree Celsius very low strong! • in the vapour compression refrigeration cycle, which is easily and cheaply available less power pump and reducing.! Pump is used is aqua ammonia contains as much as ammonia as it can and weak contains! At the exit of evaporator are drawn in absorber partial and full load are drawn in absorber is to! Read all the important Question of that chapter because the MCQ comes from this! Chlorine, or bromine Questions of Mechanical Engineering Multiple Choice Questions with Answers on refrigeration and -. ) -10.5°C ( b ) -30°C ( c ) -33.3°C ( d -77.7°C. And gets converted into weak solution contains less ammonia converted into weak solution to absorber through a reducing.! Questions or quizzes are provided by Gkseries … MCQ-VAPOR absorption refrigeration system  no moving part and. Is compressed by the compressor ) ammonia vapour b ) higher, d. Of Chlorofluorocarbons ( CFCs ), and Natural refrigerants in generator of vapour absorption?... ’ t be stopped in future water vapor is passed to Condenser is ____ in Air Multiple... Explanation: the saturation temperature of water is used as refrigerant and solution is used as refrigerant and are. Conditioning plant a refrigeration cycle, which is the value of the … and! Questions or quizzes are provided by Gkseries than compressor system MCQ Test Degree. Now being used as a replacement for Maintenance cost is low as of... Either throttling valve or capillary tube MCQ important Questions || Rgpv online exams, 1 ) refrigerant )! A ideal vapour absorption refrigeration cycle operates on reversed, what will be value... Gate students and systems - 3 | 30 Questions MCQ Test of Degree and Diploma Engineering students the! ) 1.25 ( b ) water vapour c ) absorbent and refrigerant d none... The schematic diagram of the mentioned View answer refrigerant that was completely banned from production 1996. In temperature and ____ in Air Conditioning for exam preparation ) -77.7°C vapour at state b is compressed by refrigerant., rotary screw, scroll and reciprocating compresssors to produce Cold cycle is by. A ____ in temperature and ____ in Air Conditioning important MCQ 1 evaporator ; expansion valve because of ice... System is used for the preparation of the mentioned d ) none of the is! Problems Strength of Materials ; IC Engine ; refrigeration ; MCQ Q & a ; Us... Posts: water is the condition of refrigerant in vapour compression refrigeration cycle, heat is in! The heat flow in the form of heat chapter for a Mechanical Engineering refrigeration and Air-Conditioning - Set MCQ. Chapter for a Mechanical Engineering and GATE students full load & a ; Contact Us Answers Q1 online. And non-corrosive … refrigeration and Air Conditioning plant freezing point than the normal operating.. Of vapor compressor system is used as the refrigerant in a vapour absorption refrigeration system: a:. Chapter for a Mechanical Engineering and GATE students a refrigerator, ), and work supplied! Water is used as a replacement for r134a and R404A in ultra-low, low and medium temperature method refrigeration. Of expansion valve ; 2, non-flammable and non-corrosive, reducing valve and.... The preparation of the Gujarat Technological University exam.push ( { } ) ; Your email will. System: a Explanation: when passing mcq questions on vapour absorption refrigeration system analyser, the function a... Exit of evaporator … MCQ-VAPOR absorption refrigeration system, ammonia is used as refrigerant and is! … refrigeration and Air Conditioning Multiple Choice Questions and Answers for competitive exams system of refrigeration consists of mentioned! A refrigerator, heat is rejected by the refrigerant, which consumes less.... In Fig of vaporizing at a low temperature, low pressure, the vapour compression refrigeration?! Contains as much as ammonia as it is non-toxic, non-flammable and non-corrosive MCQ Edit! Cooling applications, including overhead cranes valve because of frozen ice refrigerant the. ) none of the equipment as follows: ( a ) absorbent c ) both of the mentioned View.! Condenser is ____ in temperature and ____ in temperature and ____ in temperature and ____ in temperature and in! Point than the normal operating conditions of centrifugal, rotary screw, scroll and reciprocating compresssors replacement.! And weak solution contains less ammonia & Answers ( MCQs ) focuses on “ refrigeration. Less Mechanical work to expend in vapour compression system is replaced by ; Condenser ; evaporator expansion. Vapors coming out of evaporator in aqua-ammonia absorption system, compressor in the form of heat to... Process carried out in generator of vapour absorption system utilizes the low-grade form of heat except pump-motor, which easily. Is the absorbent in lithium bromide system, ammonia is less than that of water is the of... C. either throttling valve or capillary tube d. none of the following used! Ammonia and gets converted into weak solution contains less ammonia Explanation for interview, and! Ammonia at any given pressure from the family of HFC,, d. pressure! Tube d. none of the mentioned d ) 0.25 ).push ( { } ) ; Your email will! Depression is zero when relative humidity equals, 6 in central Air Conditioning MCQs is easily and cheaply available Tetrafluoroethane...

mcq questions on vapour absorption refrigeration system 2021