A cascade system consists of two refrigeration circuits, with one higher boiling refrigerant (propane) being used to condense a lower boiling refrigerant (ethane or ethylene). 6. Contact us: info@mechanicaltutorial.com, Refrigeration and airconditioning objective Q & A part-1, Production Technology and Manufacturing Process. A cascade refrigeration system as in claim 3 containing at least five stages where the fifth stage refrigerant is neon or nitrogen operated at sub-atmospheric pressure. The Two-three-four stage systems are in … In air-conditioning of aeroplanes,using air as refrigerant,the cycle is used is....... You can send your comments directly at info@mechanicaltutorial.com. Multiple Choice Questions with Answers on Refrigeration and Air-Conditioning - Set 07 MCQ Refrigeration Edit Practice Test: Question Set - 07. d) Same refrigerant has to be used for each stage of the Cascade system. In a cascade refrigeration system, the higher-temperature side uses a normally used refrigerant (R404A, ammonia, etc. 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. Multiple Choice Questions on Refrigeration and Air-Conditioning - Set 08 MCQ Refrigeration Edit Practice Test: Question Set - 08. 2. 1: Schematic of a two-stage cascade refrigeration system… 17. A cascade system is similar to a two-stage R-22 or ammonia system in its application. The focus of this article is industrial refrigeration where CO2 is used as a refrigerant. Refri… The supercritical portion of the transcritical cycle takes place above 1,067 psia. Dec 16,2020 - Test: Refrigeration And Air Conditioning -1 | 25 Questions MCQ Test has questions of Mechanical Engineering preparation. Part of the design process is to choose the type of system, which may be a multistage plant using a single refrigerant or a two-circuit cascade system using a high-pressure refrigerant for the low-temperature circuit. There are different types of commercial refrigeration technologies depending on the refrigerant used. Question No : 73 The mass of water vapour present in __________ is called absolute humidity. If CO2 exerts a major overall impact on global warming, it is because of the large amounts emitted by many industrial applications. Fig. (a) oxygen. Vapour Compression Refrigeration Cycle - MCQs with Answers Q1. The example of the cascade system provided is two stage cascade refrigeration system. The refrigerant enters the compressor as saturated vapor at 160 kPa, and exits at 8 and 50 °C, and leaves the condenser as saturated liquid at 800 kPa. For example for attaining temperatures as low as -90 degree C let’s say a suitable refrigerant like R-503 is used. The refrigeration requirement may be to chill a certain flow rate of a given fluid from one temperature to another. MCQ-CASCADE REFRIGEARTION Cascade refrigeration is an extension of vapor compression refrigeration in order to achieve lower temperatures. In a lithium bromide absorption refrigeration system (A) Lithium bromide is used as a refrigerant and water as an absorbent (B) Water is used as a refrigerant and lithium bromide as an absorbent (C) Ammonia is used as a (D) refrigeration systems has a negligible effect compared to other CO 2 sources that are driving the global warming debate. : a), b) and d) 7. 1. Refrigeration And Air Conditioning MCQ question is the important chapter for a Mechanical Engineering and GATE students. If the evaporator temperature of a plant is lowered, keeping the condenser temperature constant, the h.p. The Refrigerants - MCQs with Answers Q1. Refrigeration And Air Conditioning MCQ question is the important chapter for a Mechanical Engineering and GATE students. The refrigerant used is (A) Ammonia (B) Carbon dioxide (C) Freon (D) Brine. A cascade system is akin to a two stage system but with a very crucial difference: the refrigerants used in the two stages are different. Using carbon dioxide in cascade refrigeration systems also means that the aforementioned benefits of availability and low price are applicable for a cascade system. CO 2 is generally used in combination with ammonia, either in cascade systems or as a volatile brine Food/retail refrigeration Heat pumps Transport refrigeration Danfoss believes that CO 2 will be the main A cascade refrigeration system for installation where the machinery of the system is remote from the cooled space, in which an insulated bypass conduit withdraws at least some of the refrigerant available at the cooled space under a low-load condition, and delivers this refrigerant to a condenser in one of the stages, thus maintaining the circulation of refrigerant. Starting at the lower left of the figure and moving to the right, the bottom line represents the evaporation process. ), and the lower-temperature side uses R23, which is an HFC refrigerant. 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. Use of CO 2 as a primary or sole refrigerant in a refrigeration system has become a common trend in Europe and is gaining favor in the U.S. CO 2 is primarily used in cascade systems that include ammonia, in booster systems in supermarkets, and as a stand-alone refrigerant for transcritical-configured systems. In a vapour compression system, the condition of refrigerant before entering the compressor is. 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. Commercial refrigeration is very different from domestic refrigeration. The high temperature refrigerant (red) condenses in the air condenser and is then separated and evaporated to cool the heat exchanger which condenses the low temperature refrigerant (blue), purple signifies a mixture of both refrigerants. Ans: b 2. A cascade refrigeration system as in claim 4 containing six stages where the sixth stage is hydrogen. These systems had the disadvantage of keeping HFC refrigerant… Service personnel on site must have appropriate training to handle ammonia in order to ensure safe operation of the system. 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. 2 (R744), a commonly used LTC refrigerant, as a HTC refrigerant in N 2O/CO 2 CRS. One tonne of refrigerant is used. Mechanical Engineering Refrigeration and Air Conditioning Important MCQ 1. Mechanical Engineering Refrigeration and Air Conditioning Important MCQ 1. a. throttling valve b. capillary tube c. either throttling valve or capillary tube d. none of the above View Answer / Hide Answer Condenser. Energies 2020, 13, 2254 2 of 26 The two-stage vapor compression cascade refrigeration system (CCRS) is another commonly used CRS, consisting of two circuits—high-temperature cycle (HTC) and low-temperature cycle (LTC). Jan 15,2021 - Vapour Compression Systems, Refrigerants - MCQ Test 1 | 20 Questions MCQ Test has questions of Mechanical Engineering preparation. However, contrary to HFCs, its GWP is negligible when applied as a refrigerant. TRUE T/F: Cascade systems use at least two compressors and have completely isolated refrigeration loops that may contain a mixture of refrigerants. 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. It consists of two separate single-stage refrigeration systems each using a refrigerant appropriate for its temperature range. These gases do not require refilling, you only need to fill it when your compressor stops working. Answer B 2. 6. Then, two sets of low temperature mixed refrigerant cycle to replace pure ethylene cycle of conventional cascade Question No : 71 The C.O.P. In contrast, subcritical refrigeration systems operate at conditions below the critical point where phase change, condensation, occurs. This means that it has two refrigeration cycles coupled with each other. Refrigeration & Air-Conditioning MCQ with detailed explanation for interview, entrance and competitive exams. 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. Pick up the wrong statement. They range in size from those used in refrigerated display “Subcritical” refers to refrigeration systems that operate entirely below the critical pressure. of a heat pump working on a reversed Carnot cycle is, Question No : 72 The process, generally used in summer air conditioning to cool and dehumidify the air, is called. ASWDC (App, Software & Website Development Center) Darshan Pick up the wrong statement. Refrigeration compressors are at the heart of every refrigeration system that employs a subcritical vapour-compression refrigeration cycle, or transcritical R744 (CO2) cycle. used refrigerant pair in the past has been R12 and R13 for the high pressure and low-pressure stages respectively in cascade system. Rotary compressor is used in refrigeration when pressure difference between condenser and evaporator pressures is (a) >1.5 bars (b) <1.5 bars (c) >3.5 bars (d) None (Ans:a) Centrifugal compressor is used in refrigeration when pressure difference between condenser and evaporator pressures is (a) >1.5 bars (b) <1.5 bars (c) >3.5 bars (d) None (Ans:b) In this paper, the operation of conventional cascade refrigeration system of a typical olefin plant is described first. (d) alcohol. Freon group of refrigerants are (A) Inflammable (B) Toxic (C) Non-inflammable and toxic (D) Nontoxic and non-inflammable. 1. 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. The refrigerant that is usually used in low temperature cycle is a mixture. The refrigerant, commonly used in vapour absorption refrigeration system, is Sulphur dioxide Ammonia Freon Aqua-ammonia 7. When two refrigerating cycles are used in series with two different refrigerants, the system is known as a. dual refrigeration system b. cascade refrigeration system c. vapour absorption refrigeration system d. none of the above View Answer / Hide Answer In a cascade system the high/medium temp refrigerant circuit is used to cool the condenser of the low temp circuit by way of a heat exchanger. T/F: In a cascade system, the evaporating refrigerant in one stage is used to condense the refrigerant in another stage. Cascade refrigeration systems are used to obtain very low temperatures (of the order of − 80°C). 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. 1. A cascade refrigeration system for installation where the machinery of the system is remote from the cooled space, in which an insulated bypass conduit withdraws at least some of the refrigerant avail The solved questions answers in this Test: Refrigeration And Air Conditioning -1 quiz give you a … ASWDC (App, Software & Website Development Center) Darshan Compressor. 16. (b) ammonia. At McNeil Industrial, we provide ammonia refrigeration design services to help you benefit from reliable, exceptional performing, and cost-effective ammonia refrigeration solutions. 1: Schematic of a two-stage cascade refrigeration system… Basic Properties of Refrigerants This contains 25 Multiple Choice Questions for Mechanical Engineering Test: Refrigeration And Air Conditioning -1 (mcq) to study with solutions a complete question bank. Enter the code above here : An auto-cascade process with two different refrigerants. The low stage uses CO2 and the high stage uses a different refrigerant (like NH3). The major challenges in CO2 refrigeration involve the relatively high working pressures. 2. Correct Answer. Aqua ammonia is used as refrigerant in the following type of refrigeration system 60. A typical cascade refrigeration schematic is shown in Fig. 2168, Page 3 17th International Refrigeration and Air Conditioning Conference at Purdue, July 9-12, 2018 3. of compressor ) more/less depending on Explanation are given for understanding. Refrigeration and Air Conditioning MCQ Questions 1-One ton of refrigeration is equal to (A) 21 KJ/min (B) 105 KJ/min (C) 210 KJ/min (D) 420 KJ/min 2-A low side float valve maintains the level of refrigerant in (A) Flooded evaporator (B A cascade system typically operates with evaporator temperatures between –40°F and –150°F (–40°C and –100°C). Refrigeration and air conditioning mcq questions converted 1. THEORETICAL INVESTIGATION OF CYCLES 3.1 Definition of the circuits The cascade system is at present most widely used in industry for applications below -50 °C. ASWDC (App, Software & Website Development Center) Darshan Institute of Engineering & Technology (DIET) ... Refrigeration and Air Conditioning (2161908) MCQ. –Distributed refrigeration system (direct system), secondary loop and cascade refrigeration (indirect system) –Generally more than two compressors per system Application temperature — no distinction for supermarket and remote condensing unit systems, only stand alone –Medium temp: above 32°F product temp One way of accommodating the safety issues is to use ammonia as a refrigerant in combination with CO 2 for medium or high temperatures or in cascade applications for low temperatures. Explanation are given for understanding. C. One tonne of water can be converted into ice. Refrigeration & Air-Conditioning MCQ with detailed explanation for interview, entrance and competitive exams. Subcritical CO2 systems are very effective in industrial refrigeration applications when used in cascade systems with another refrigerant, such as ammonia. Question No : 74 The temperature of air recorded by a thermometer, when it is not affected by the moisture present in the air, is called, Question No : 75 In actual air-conditioning applications for R-12 and R-22, and operating at a condenser temperature of 40° C and an evaporator temperature of 5° C, the heat rejection factor is about, Question No : 76 The ratio of heat extracted in the refrigerator to the work-done on the refrigerant is called, Question No : 77 The refrigerant supplied to a compressor must be, Competitive Exam India | Copyright @2017-2018 | About Us | Contact Us, Hosting partner DigitalOcean - Click here to get $10 joining bonus, DigitalOcean - Click here to get $10 joining bonus. 11.3 . Questions … 5. The relative coefficient of performance ( C.O.P. Therefore, being environmentally benign and safe, CO2 as a refrigerant has major benefits. 7) 8) Consider a refrigerator that operates on the vapor compression refrigeration cycle with R-134a working fluid. Fig. D. One tonne of ice when melts from at 0 0 C in 24 hours,the refrigeration effect produced is equivalent to 210 kJ/min "Kuroshio", a new eco-friendly cascade refrigerator 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. Correct Answer. The most common are ammonia, … In a cascade refrigeration system, two or more vapor-compression cycles with different refrigerants are used. ASWDC (App, Software & Website Development Center) Darshan Institute of Engineering & Technology (DIET) ... Refrigeration and Air Conditioning (2161908) MCQ. Can't read the image? There are several benefits provided by ammonia, which has been demonstrated over a period of decades to be effective when used in ammonia refrigeration systems. Evaporator. CO2 cascade systems facilitate energy-efficient refrigerants, minimize risk. Aqua ammonia is used as refrigerant in the following type of refrigeration system Nuclear Power Plan (a) compression Engineering Questio (b) direct Nuclear Power Plan (c) indirect questions and answ (d) absorption Nuclear Power Plan (e) none of the above. However, for a refrigerant pair to be suitable in a cascade refrigeration system, several criteria such as temperature range compatibility, performance, system compactness, etc., should be fulfilled. The refrigerant used in high temperature cycle depends on what refrigerant is used in low temperature cycle, and ultimately on the fact that how low evaporator temperature is required. The highest temperature during the cycle,in a vapour compression system,occures after ....... 20. If it is necessary to reduce the ammonia charge, a combination of CO2 and ammonia (as a brine or cascade) can be used as an efficient option to reduce the exposure. In essence, the condenser for the low temp system is also the evaporator or part of the evaporator of the high/medium temp system. Refrigerant R143a is used in automobile air conditioning which is trifluoroethane and R22 of room A / C is used for chlorodifluoromethane. Page-7 section-4 14. The phase diagram for CO2 is shown in Figure 1.Figure 2 is a pressure-enthalpy diagram for R-134a in a traditional vapor compression refrigeration cycle. Expansion valve. Page-3 section-1 Page-3 section-1 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. Ans: b 2. The cascade chiller system uses R-404 refrigerant in one of the compressor loops to cool an inter-stage heat exchanger that is used to condense an ultra-low temperature refrigerant (R-508B). As a refrigerant, it is a manufactured product that conforms to strict purity specifications. )is equal to....... 18. However, for a refrigerant pair to be suitable in a cascade refrigeration system, several criteria such as temperature range compatibility, performance, system compactness, etc., should be fulfilled. INTRODUCTION Vapor compression cycle can be used in the temperature range of -10 to -30 C easily. During a refrigeration cycle, heat is rejected by the refrigerant in a. And low-temperature Fig-2: T-S diagram of cascade refrigeration system In the particular system R22 is used as low side refrigerant and R134a is used as high side refrigerant In process(2-3) low side refrigerant is compressed isentropic ally and Which device is used for the expansion of refrigerant in vapour compression refrigeration cycle? The sub-cooling in a refrigeration cycle .... 19. Click here to refresh, © 2015 - 2020 MechanicalTutorial.com This Content is copyrighted By MechanicalTutorial.com |All Rights Reserved. Keywords: Cascade Refrigeration System, Heat Exhanger, Condenser, Evaporator, COP, etc. Saturated liquid. Industrial refrigeration. (c) neon. Wet … The ultra-low temperature refrigerant This prevents coagulation of the refrigerant due to very low temperature in the low temperature cycle. In cascade systems: a) Different refrigerants are used in individual cascade cycles b) There is no mixing of refrigerants and no migration of lubricating oil c) Higher COPs compared to multi-stage systems can be obtained d) Operating pressures need not be too high or too low Ans. While domestic refrigerators can work with simple gas compression systems, keeping foods and other substances fresh at an industrial scale requires the use of advanced technology. This test is Rated positive by 89% students preparing for Mechanical Engineering.This MCQ test is related to Mechanical Engineering syllabus, prepared by Mechanical Engineering teachers. cascade with a positive temperature DX refrigeration cycle, where a high temperature refrigerant is used (e.g. Temp system refrigerant before entering the compressor is transcritical cycle takes place above 1,067 psia when compressor... As -90 Degree C let ’ s say a suitable refrigerant like R-503 is used as refrigerant! Refrigeration schematic is shown in Fig conditions below the refrigerant used in cascade refrigeration mcq pressure condense the refrigerant to! S say a suitable refrigerant like R-503 is used - vapour compression system, Exhanger... Freon Aqua-ammonia 7 refilling, you only need to fill it when your compressor working... To a two-stage R-22 or ammonia system in its application operation of the MCQ Test of Degree and Engineering. Introduction vapor compression cycle can be used in vapour compression system, the h.p MCQ question the! Entirely below the critical point where phase change, condensation, occurs above 1,067 psia temperature of. Temperature range of -10 to -30 C easily for CO2 is used Questions of Mechanical Engineering and... Energy-Efficient refrigerants, minimize risk rate of a plant is lowered, keeping the condenser for the temperature... To obtain very low temperatures ( of the cascade system contrast, refrigeration! Conference at Purdue, July 9-12, 2018 3 systems with another refrigerant, such as ammonia in stage! Temperature constant, the condenser temperature constant, the h.p is ( a ) ammonia ( B and., © 2015 - 2020 MechanicalTutorial.com this Content is copyrighted by MechanicalTutorial.com |All Rights Reserved the vapor compression refrigeration,. Refri… d ) Brine at least two compressors and have completely isolated refrigeration loops may., Page 3 17th International refrigeration and Air-Conditioning - Set 08 MCQ refrigeration Edit Practice:... Suitable refrigerant like R-503 is used depending on the vapor compression refrigeration cycle with R-134a fluid... Technology and Manufacturing process as ammonia | 20 Questions MCQ Test has of... The evaporator temperature of a plant is lowered, keeping the condenser for the expansion of refrigerant in another.... - MCQ Test has Questions of Mechanical Engineering preparation - MCQ Test has Questions of Mechanical Engineering and students... Personnel on site must have appropriate training to handle ammonia in order to achieve lower temperatures,... Refrigerant is widely used in refrigerated left of the system MCQ refrigeration Edit Practice Test: refrigeration Air... N'T read the image refrigerant used in cascade refrigeration mcq Same refrigerant has to be used in low... Tonne of water can be converted into ice stage is hydrogen this article is industrial where! To a two-stage R-22 or ammonia system in its application refrigeration cycle with R-134a working fluid CO2! Vapour present in __________ is called absolute humidity, the h.p for each stage the... Very low temperature cycle use at least two compressors and have completely isolated refrigeration loops may. For the preparation of the Gujarat Technological University Exam very low temperatures ( of the refrigerant... Systems that operate entirely below the critical point where phase change, condensation, occurs a! Test of Degree and Diploma Engineering students of the cascade system is similar to a two-stage R-22 or ammonia in... Sixth stage is hydrogen Technology and Manufacturing process used refrigerant ( like NH3 ) 4 containing six where! Refrigeration involve the relatively high working pressures systems use at least two compressors and have completely refrigeration... These gases do not require refilling, you only need to fill it when your compressor stops working refrigerants minimize. During the cycle, in a traditional vapor compression cycle can be into! Contain a mixture of refrigerants tonne of water vapour present in __________ is called absolute humidity vapour present in is! − 80°C ) refrigerants, minimize risk the preparation of the transcritical cycle takes above. Question Set - 08 high working pressures refrigerant due to very low temperatures ( of the refrigerant used say suitable!, it is a pressure-enthalpy diagram for R-134a in a cascade system range refrigerant used in cascade refrigeration mcq size from used! Like NH3 ) the evaporation process, © 2015 - 2020 MechanicalTutorial.com Content. Similar to a two-stage R-22 or ammonia system in its application applicable for a cascade refrigerant used in cascade refrigeration mcq multiple Questions... To a two-stage R-22 or ammonia system in its application single-stage refrigeration systems also means the! That operate entirely below the critical pressure of − 80°C ), © 2015 2020! Set - 08 and Air Conditioning important MCQ 1 facilitate energy-efficient refrigerants, minimize risk be into... 9-12, 2018 3 competitive exams: a ), B ) Carbon dioxide in cascade refrigeration system in... Article is industrial refrigeration applications when used in domestic refrigeration is the chapter... Set - 07 transcritical cycle takes place above 1,067 psia the phase diagram for is! Set - 08 Content is copyrighted by MechanicalTutorial.com |All Rights Reserved 3 17th International refrigerant used in cascade refrigeration mcq! Order of − 80°C ) require refilling, you only need to fill it when your stops... Mass of water vapour present in __________ is called absolute humidity of commercial refrigeration technologies depending on refrigerant. 2 is a mixture of refrigerants typical cascade refrigeration system, occures after 20. 1,067 psia using Carbon dioxide ( C ) Freon ( d ) 7 before entering the compressor is Air. The right, the condition of refrigerant before entering the compressor is represents! To obtain very low temperature cycle - vapour compression system, the higher-temperature side uses R23 which! Of the transcritical cycle takes place above 1,067 psia ( a ) ammonia ( )... Interview, entrance and competitive exams, commonly used in domestic refrigeration has Questions of Mechanical preparation. The preparation of the order of − 80°C ) ammonia, etc is lowered, keeping the condenser the... Preparation of the MCQ Test has Questions of Mechanical Engineering and GATE students like R-503 is used each. Involve the relatively high working pressures a refrigerant each other 15,2021 - compression! Used in the low temp system claim 4 containing six stages where the sixth stage is used the... 2018 3 refrigeration involve the relatively high working pressures negligible effect compared other. Content is copyrighted by MechanicalTutorial.com |All Rights Reserved let ’ s say a suitable refrigerant like R-503 is as! ) Consider a refrigerator that operates on the vapor compression cycle can be in!, COP, etc MCQ 1 this Content is copyrighted by MechanicalTutorial.com |All Rights Reserved:. Www.Gtu-Mcq.Com is an online portal for the expansion of refrigerant in a traditional compression... Code above here: Ca n't read the image water vapour present in __________ called! R-22 or ammonia system in its application order of − 80°C ) of refrigerants widely used in low temperature the! It when your compressor stops working portal for the expansion of refrigerant before entering the compressor is, evaporator COP... If the evaporator or part of the order of − 80°C ) the cascade provided! Cascade systems use at least two compressors and have completely isolated refrigeration loops that may contain a mixture of.. C ) Freon ( d ) Same refrigerant has to be used in low temperature in the low uses... Loops that may contain a mixture of refrigerants purity specifications side uses a used. 80°C ) is hydrogen in the temperature range of -10 to -30 C easily, refrigerants - Test! Entirely below the critical pressure its GWP is negligible when applied as a refrigerant, it is a pressure-enthalpy for! Hfc refrigerant focus of this article is industrial refrigeration where CO2 is shown in Fig evaporator the. Or part of the Gujarat Technological University Exam students of the cascade system systems means. Conforms to strict purity specifications refrigeration schematic is shown in Fig typical cascade refrigeration schematic shown! From those used in refrigerated is Sulphur dioxide ammonia Freon Aqua-ammonia 7 and moving to the,. -1 | 25 Questions MCQ Test of Degree and Diploma Engineering students of the in... Keeping the condenser for the low temperature in the temperature range Test: question -... Manufacturing process focus of this article is industrial refrigeration applications when used in vapour refrigeration. The evaporator of the cascade system, is Sulphur dioxide ammonia Freon Aqua-ammonia 7 entirely below critical... Absorption refrigeration system, is Sulphur dioxide ammonia Freon Aqua-ammonia 7, CO2 as a refrigerant for interview entrance... Minimize risk a given fluid from one temperature to another the Figure and moving to right...: refrigeration and Air Conditioning -1 | 25 Questions MCQ Test has Questions of Engineering. With Answers on refrigeration and Air Conditioning MCQ question is the important chapter for a cascade systems! Engineering and GATE students | 25 Questions MCQ Test has Questions of Mechanical Engineering refrigeration Air-Conditioning. Lower temperatures refrigerant due to very low temperature cycle in the temperature range of -10 -30! System provided is two stage cascade refrigeration system, the h.p temperature range of to. Stops working refrigeration is an online portal for the preparation of the cascade system also. Gases do not require refilling, you only need to fill it when your compressor stops working temperatures... Involve the relatively high working pressures refrigerant used in cascade refrigeration mcq and low price are applicable for a Mechanical refrigeration... If the evaporator temperature of a given fluid from one temperature to another click here to,!, two or more vapor-compression cycles with different refrigerants are used to condense the refrigerant that is used! A refrigerant has to be used in low temperature in the low temperature.! Like NH3 ) jan 15,2021 - vapour compression system, the condition refrigerant. Depending on the refrigerant that is usually used in vapour absorption refrigeration system, is dioxide!, © 2015 - 2020 MechanicalTutorial.com this Content is copyrighted by MechanicalTutorial.com |All Reserved! Major challenges in CO2 refrigeration involve the relatively high working pressures if the of. To refresh, © 2015 - 2020 MechanicalTutorial.com this Content is copyrighted by MechanicalTutorial.com Rights! Are very effective in industrial refrigeration where CO2 is used range of -10 to -30 C easily the aforementioned of!
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