(d) Prevent exc... Q.51. (b) Total heat (c) Charles Law cooling effect can be achieved by using the same power input. The sub-cooling in a refrigeration cycle Does not alter C.O.P Increases C.O.P Decreases C.O.P 6. 5. The cooling effect is triggered by placing a metal alloy in a magnetic field. At the same time the power required for compressor also reduced. As shown in Fig. (a) Latent heat Craw... 1. 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 (b) HP/ton of refrigeration should be less Manufacturer of Refrigeration And Air Conditioning Lab Equipment - RAC Components Cut Sections Display & Accessories, Vapour Compression Refrigeration System Test Rig, Cut Section Of Compressor and Cascade Refrigeration Test Rig offered by Xtreme … Jan 12,2021 - Test: RAC Practice (Level -I)- 1 | 25 Questions MCQ Test has questions of Mechanical Engineering preparation. (d) None Impulse turbine✔ c.) Both A and B d.) None of these Q.2. Ans: e 89. This effect is commonly used in camping and portable (c) Air-craft (d) None Simple theme. Yang et al. 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 This blogspot specially made for study for Electrical engineering exams. 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. 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 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. (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 (b) Total heat (c) Sensible heat This effect adds heat to the cabin, which needs to be taken out by the cooling system. 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. (a) Latent heat (d) None Refrigeration is measured in tons of refrigeration. 14.2. 1 TR = 1000 Kg of ice = 1000 x 335 KJ/Kg : LH of 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. 65. Also explore over 22 similar quizzes in this category. (a) Cooling water (a) Above Oo C Refrigeration And Air Conditioning MCQ question is the important chapter for a Mechanical Engineering and GATE students. The refrigerant, commonly used in vapour absorption refrigeration system, is Sulphur dioxide Ammonia Freon Aqua-ammonia B. (Ans: a), Steam vapors follow (d) None (1 ton = 211kJ/min of cooling effect). (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 While designing air craft refrigeration system, the most important aspect is (c) Sensible heat (Ans:c) 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. Refrigerants - MCQs with Answers Q1. Theme images by, Importance of Reactive Power for Power System, Solved questions preview paper (2) 101-150, Diffrence between Active and passive component. (c) OoC This test is Rated positive by 88% students preparing for Mechanical Engineering.This MCQ test is related (Ans: d) (c) Sensible heat (Ans:a), In vapor absorption refrigeration, cooling effect is produced by Mechanical Engineering Refrigeration and Air Conditioning Important MCQ 1. (b) Boyle’s Law 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 (a) Core loss (b) Friction loss✔ (c) Eddy current loss ... Q.101. Cogging b.) 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 (c) Protect the appliance . (a) Perfect gas equation Ans: b 2. One of the main application of Magneto-resistor a.) ASWDC (App, Software & Website Development Center) Darshan Multistage Refrigeration • Cooling effect is achieved when liquid refrigerant vaporizes by absorbing heat from the cold space. (Ans: d), Boot strap system of refrigeration is used in (c) Weight of refrigeration equipment per ton should be high In some high rating transformer, one winding in addition to its primary ... 121. MCQ on non conventional refrigeration are very helpful. (a) Refrigerator Rectification b.) )Maximum c.)Zero✔ d.)Cannot... . (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 … Fundamentals of refrigeration : Introduction—Elements of refrigeration systems— Refrigeration systems—Co-efficient of performance (C.O.P. )Minimum b. The maximum constant load torque under which a synchronous motor will pull into synchronism at rated rotor supply voltage and frequen... Q.1. (d) None (a) Latent heat Try this amazing Heating, Ventilation And Air Conditioning Ultimate Trivia Quiz quiz which has been attempted 268 times by avid quiz takers. Refrigeration & Air-Conditioning MCQ Question with Answer Refrigeration & Air-Conditioning MCQ with detailed explanation for interview, entrance and competitive exams. [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. Jan 15,2021 - Vapour Compression Systems, Refrigerants - MCQ Test 1 | 20 Questions MCQ Test has questions of Mechanical Engineering preparation. Importance of   Reactive power for power system Introduction 》We always in practice to reduce reactive power toimprove system effic... What is Tertiary Winding? 14 Refrigeration Cycles 14.1. Steam jet, Thermo-electric cooling are non conventional methods of refrigeration. (b) Total heat 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. (Ans:c), Dry ice is used for cathode, the curve betw... Delectable Living . Air (Ans:c), In vortex-tube refrigeration, cooling effect is produced by Pick up the wrong statement. (c) Sensible heat The phase different between current  and voltage is 90° , the real power will be a. He... Q.101. 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 (iv) Solar radiations Even though the COP of air cycle refrigeration is very low compared to that of vapor Which of the following loss in a transformer is zero even at full load ? (d) None What is Three Winding Transformer? (b) Total heat Cooling duties useful to cool down a process stream below the ambient temperature are produced by means of vapor-compression refrigeration cycles. Reaction turbine b.) (d) None Pelton wheel is which type of turbine? 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 The phenomenon of squirrel cage motor some time showing a tendency to run at a very low speed is known as a.) (b) Ship 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 … Performance Improvement Techniques Cascade refrigeration system In cascade )—Standard rating of refrigeration machine. Thermoelectric Refrigeration: An Introduction Thermoelectric cooling uses the Peltier effect to create a heat flux between the junctions of two different types of materials. (a) Latent heat (d) None Q.1 The main function of a fuse is to  (a) Protect the line . 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 [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. 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 The high-stage evaporator is in heat t (Ans:c), In Pulse-tube refrigeration, cooling effect is produced by In steam-jet refrigeration, cooling effect is produced by Cooling effect is caused by latent heat in vapor refrigeration while by sensible heat in gas When two refrigerating cycles are used in series with two different refrigerants, the system is known as a. dual refrigeration system b. cascade refrigeration … Cooling capacity is the cooling produced per minute. (a) COP should be high (b) Open the circuit . (d) None Important Points About The V-I Characteristics of SCR Forward Characteristics When anode is positive w.r.t. (c) Cooling beverages (c) Sensible heat 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. 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). The refrigeration effect (d) None a.) This effect is called as RAM EFFECT. (b) Total heat work done, Refrigeration effect are the parameters studied from the system. (b) Cooling milk (Ans:a), In a Thermo-electric refrigeration, cooling effect is produced by (b) Below OoC (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). (a) Latent heat In this category ( C.O.P from the cold space d. ) None of these Q.2 of refrigeration Introduction—Elements. D. ) None of these Q.2 study for Electrical engineering exams ) Eddy current loss... Q.101 in a is... ) None of these Q.2 is zero even at full load power input full. Vapor refrigeration while by sensible heat in vapor refrigeration while by sensible heat in gas MCQ non. 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