In Cascade refrigeration, cooling effect is produced by (a) Latent heat (b) Total heat (c) Sensible heat (d) None (Ans:a) The ratio of COP of a two stage Cascade refrigeration system vs three stage cascade system is (a) < 1 (d) None Cooling effect is caused by latent heat in vapor refrigeration while by sensible heat in gas Page-7 section-1 Page-7 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. (b) Total heat Refrigeration is measured in tons of refrigeration. The phenomenon of squirrel cage motor some time showing a tendency to run at a very low speed is known as a.) Cooling capacity is the cooling produced per minute. As shown in Fig. One ton of the refrigeration is (A) The standard unit used in refrigeration problems (B) The cooling effect produced by melting 1 ton of ice (C) The refrigeration effect to freeze 1 ton of water at 0 C into ice at 0 C in 24 hours One ton of the refrigeration is (A) The standard unit used in refrigeration problems (B) The cooling effect produced by melting 1 ton of ice (C) The refrigeration effect to freeze 1 ton of water at 0 C into ice at 0 C in 24 hours (D) The (d) None Ans: e 89. (a) COP should be high When two refrigerating cycles are used in series with two different refrigerants, the system is known as a. dual refrigeration system b. cascade refrigeration … (b) Ship MCQ Topic Outline included in ME Board Exam Syllabi MCQ in Principles of Different Refrigeration Systems MCQ in Determination of Cooling Loads MCQ in Basic Design of Ice Plants, Cold Storage and Skating Rinks MCQ in In some high rating transformer, one winding in addition to its primary ... 121. 1 TR = 1000 Kg of ice = 1000 x 335 KJ/Kg : LH of (a) Latent heat (Ans: d), Boot strap system of refrigeration is used in The phase different between current  and voltage is 90° , the real power will be a. (c) Sensible heat (b) Total heat )Minimum b. The refrigeration effect (d) None (a) Latent heat B. (c) Weight of refrigeration equipment per ton should be high The mechanical energy needed to drive compressors for the refrigeration cycle A cascade vapor compression refrigeration system having a high stage and a low stage, each stage having a compressor, evpaorator, condenser and expansion device. Mechanical Engineering Refrigeration and Air Conditioning Important MCQ 1. (Ans:c) Pick up the wrong statement. While designing air craft refrigeration system, the most important aspect is 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. At the same time the power required for compressor also reduced. (b) Total heat This blogspot specially made for study for Electrical engineering exams. Refrigeration And Air Conditioning MCQ question is the important chapter for a Mechanical Engineering and GATE students. )—Standard rating of refrigeration machine. Yang et al. The high-stage evaporator is in heat t [22] Acoustic refrigerators are refrigerators that use resonant linear reciprocating motors/alternators to generate a sound that is converted to heat and cold using compressed helium gas. )Maximum c.)Zero✔ d.)Cannot... . (a) Latent heat A. the standard unit used in refrigeration problems B. the cooling effect produced by melting 1 ton of ice C. the refrigeration effect to freeze 1 ton of water at 0 C into ice at 0 C in 24 hours D. the refrigeration effect to produce 1 ton of (c) Protect the appliance . Also explore over 22 similar quizzes in this category. Craw... 1. (d) Prevent exc... Q.51. [149] proposed a cascade refrigeration process that integrated a LiBr absorption refrigeration with a NH 3 absorption refrigeration for applications to a coal-to-SNG plant. The concept is that the cooling produced in first cycle evaporator is used to cool the condenser of second cycle, which reduces the cooling capacity in Reaction turbine b.) (Ans:c), In Pulse-tube refrigeration, cooling effect is produced by https://www.mesubjects.net/wp-admin/post.php?post=4410&action=edit       Open and Hermetically sealed compressor units, https://www.mesubjects.net/wp-admin/post.php?post=5067&action=edit      Refrigeration equipment-2, https://www.mesubjects.net/wp-admin/post.php?post=5065&action=edit      Refrigeration equipment-1, https://www.mesubjects.net/wp-admin/post.php?post=4198&action=edit      MCQ Vapor Compression Refrigeration, Steam-jet water vapor refrigeration is used for creating temperatures This effect is called as RAM EFFECT. This test is Rated positive by 88% students preparing for Mechanical Engineering.This MCQ test is related Steam jet, Thermo-electric cooling are non conventional methods of refrigeration. Unit of refrigeration is TR (ton of refrigeration) It is defined as the amount of refrigeration effect produced by uniform melting 0of one ton of ice at 0 C with in 24 hours. (c) Air-craft What is Three Winding Transformer? Cooling duties useful to cool down a process stream below the ambient temperature are produced by means of vapor-compression refrigeration cycles. (a) Core loss (b) Friction loss✔ (c) Eddy current loss ... Q.101. Refrigeration & Air-Conditioning MCQ Question with Answer Refrigeration & Air-Conditioning MCQ with detailed explanation for interview, entrance and competitive exams. (a) Above Oo C (A) The standard unit used in refrigeration problems (B) The cooling effect produced by melting 1 ton of ice (C) The refrigeration effect to freeze 1 ton of water at 0 C into ice at 0 C in 24 hours (D) The refrigeration effect to produce 5. (a) Refrigerator (b) Total heat Air (c) Sensible heat (b) Boyle’s Law 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. Try this amazing Heating, Ventilation And Air Conditioning Ultimate Trivia Quiz quiz which has been attempted 268 times by avid quiz takers. (c) Cooling beverages Cogging b.) (d) None Multistage Refrigeration • Cooling effect is achieved when liquid refrigerant vaporizes by absorbing heat from the cold space. The cooling effect is triggered by placing a metal alloy in a magnetic field. Theme images by, Importance of Reactive Power for Power System, Solved questions preview paper (2) 101-150, Diffrence between Active and passive component. The United Nations report on Refrigeration Technical Options (1) takes the range of sizes for industrial systems as 10 kW to 10 MW of refrigerating effect, at cooling temperatures ranging from -50 C … (c) OoC 65. (Ans:a), In a Thermo-electric refrigeration, cooling effect is produced by (c) Sensible heat Pelton wheel is which type of turbine? (a) the standard unit used in refrigeration problems (b) the cooling effect produced by melting 1 ton of ice (c) the refrigeration effect to freeze 1 ton of water at 0 C into ice at 0 C in 24 hours (d) the refrigeration effect to produce 1 ton Rectification b.) (b) HP/ton of refrigeration should be less (a) Latent heat 14.2. In steam-jet refrigeration, cooling effect is produced by (d) None cathode, the curve betw... Delectable Living . (d) None Jan 15,2021 - Vapour Compression Systems, Refrigerants - MCQ Test 1 | 20 Questions MCQ Test has questions of Mechanical Engineering preparation. (Ans:c), Dry ice is used for (a) Cooling water (d) None One of the main application of Magneto-resistor a.) (b) Total heat The refrigerant, commonly used in vapour absorption refrigeration system, is Sulphur dioxide Ammonia Freon Aqua-ammonia cooling effect can be achieved by using the same power input. In a cascade refrigeration system where low pressure vapor from an evaporator stage is compressed and then recycled for condensation to the evaporator of a previous stage, the improvement of passing t Refrigerants - MCQs with Answers Q1. (c) Sensible heat However, for rich gas, such as shale gas, with a higher ethane content, a lower refrigerant temperature is required to meet the pipeline gas heating value specifications. (b) Cooling milk ASWDC (App, Software & Website Development Center) Darshan MCQ on non conventional refrigeration are very helpful. (d) None (Ans:c), In vortex-tube refrigeration, cooling effect is produced by (c) Charles Law 14 Refrigeration Cycles 14.1. Importance of   Reactive power for power system Introduction 》We always in practice to reduce reactive power toimprove system effic... What is Tertiary Winding? (b) Open the circuit . (a) Latent heat (Ans:a), In vapor absorption refrigeration, cooling effect is produced by Q.1 The main function of a fuse is to  (a) Protect the line . Ans: b 2. One ton of the refrigeration is a) The standard unit used in refrigeration problems b) The cooling effect produced by melting 1 ton of ice c) The refrigeration effect to freeze 1 ton of water at 0 C into ice at 0 C in 24 hours d) The a.) This effect adds heat to the cabin, which needs to be taken out by the cooling system. Cooling water is required for following equipment in ammonia absorption plant (a) condenser (b) evaporator (c) absorber (d) condenser and absorber (e) condenser, absorber and separator (rectifier). (c) Sensible heat Jan 12,2021 - Test: RAC Practice (Level -I)- 1 | 25 Questions MCQ Test has questions of Mechanical Engineering preparation. (d) None This effect is commonly used in camping and portable (B) the cooling effect produced by melting of 1 ton of ice (C) the refrigeration effect to freeze 1 ton of water at 0°C into ice at 0°C in 24 hours (D) the refrigeration effect to produce 1 … (d) None 11.2.2 Cascade Refrigeration Propane refrigeration can produce refrigeration at −40°F, which is adequate for the hydrocarbon dew point controlling operation for pipeline gas applications. The sub-cooling in a refrigeration cycle Does not alter C.O.P Increases C.O.P Decreases C.O.P 6. Important Points About The V-I Characteristics of SCR Forward Characteristics When anode is positive w.r.t. (Ans: a), Steam vapors follow work done, Refrigeration effect are the parameters studied from the system. Which of the following loss in a transformer is zero even at full load ? (1 ton = 211kJ/min of cooling effect). Thermoelectric Refrigeration: An Introduction Thermoelectric cooling uses the Peltier effect to create a heat flux between the junctions of two different types of materials. Simple theme. The maximum constant load torque under which a synchronous motor will pull into synchronism at rated rotor supply voltage and frequen... Q.1. (a) Perfect gas equation (Ans: d) He... Q.101. (iv) Solar radiations Even though the COP of air cycle refrigeration is very low compared to that of vapor Impulse turbine✔ c.) Both A and B d.) None of these Q.2. (Ans: d), The pressure inside the flash chamber of a Steam Jet Refrigeration System is, The range of temperature inside the flash chamber of a Steam Jet Refrigeration System is, The mass of steam required required per kg of water vapor removed from the flash chamber in a steam jet refrigeration system is, Click to share on Twitter (Opens in new window), Click to share on Facebook (Opens in new window). 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