Answer: Option C (Ans:b), To improve the COP of a refrigeration system, the sub-cooling in the condenser should be Ans: d (c) optimum (e) anywhere in the cycle. (d) smaller/bigger depending on capacity b) Wick feed lubricator . (Ans: b), With the increase of discharge pressure, the refrigerating effect 14. All MCQs are important for exams as well as school tests. (b) demagnetizing. (c) non-inflammable and toxic 71. 76. Pick up the wrong statement. In an Internal Combustion engine, about _____ of the latent heat produced during combustion passes through the cylinder wall into the cooling system. (c) 80 kcal/min (b) 1.2 One of the purposes of sub-cooling the liquid refrigerant is to (b) high total heat Refrigeration & Air-Conditioning MCQ with detailed explanation for interview, entrance and competitive exams. Brain Vasodilatation effect of CO2 is … (d) None (e) non-toxic and non-inflammable. (e) none of the above. Subscribe to our mailing list and get interesting stuff and updates to your email inbox. (c) using reagents (b) above which liquid becomes gas a. Aqua ammonia is used as refrigerant in the following type of refrigeration system Ans: b (b) vapour absorption Class 10 Science Chapter 13 MCQ (Multiple Choice Questions) of Magnetic Effects of Electric Current. (b) compressor and evaporator 35. 2. (c) Evaporator 47. 7.The relative coefficient of performance is (d) concentration of solution coming out of lithium bromide generator is more in comparison to that entering the generator Ans: d Ans: a 34. Ans: d (c) remains same Electric current is produced B. (a) very little work input Subject: Heat Transfer 2. (e) none of the above. ASWDC (App, Software & Website Development Center) Darshan (b) increases power required per ton of refrigeration Professionals, Teachers, Students and Kids Trivia Quizzes to test your knowledge on the subject. (c) is immaterial (d) None (c) air conditioning Students can solve NCERT Class 9 Science: Matter in our Surroundings Multiple Choice Questions with Answers to know their preparation level on Success Roar Classes Website itself. (c) the refrigeration effect to freeze 1 ton of water at 0°C into ice at 0°C in 24 hours (c) Remains same Ans: c (c) cooling below 0°C 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. Steam-jet water vapor refrigeration is used for creating temperatures (a) Above O o C (b) Below O o C (c) O o C (d) None (Ans: a) Steam vapors follow (a) Perfect gas equation (b) Boyle’s Law (c) Charles Law (d) None (Ans: d) In steam-jet refrigeration, cooling effect is produced by (a) Latent heat (b) Total heat (c) Sensible heat (d) None … 1. Superheating in … (d) toxic (a) constant pressure lines CBSE Class 10 Science Book Chapter 12 “Electricity” Multiple Choice Questions ‌(MCQs‌) with Answers. These MCQs includes almost all questions from intext questions and exercises questions. b. (d) None Chemical effect of current B. Ans: d for silicon transistor … (1 ton = 211kJ/min of cooling effect). If the evaporator temperature of a plant is lowered, keeping the condenser temperature constant, the h.p. (a)Ferrite (b) axial (a) Increases The vasodilatation produced by carbon dioxide is maximum in one of the following: A. Kidney B. The COP of a domestic refrigerator Clapeyron equation is a relation between (b) Freon-22 (d) non-toxic and inflammable (d) refrigerant with lower evaporation temperature should be used (a) Tow specific heat of liquid (b) high power consumption 38. ... 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 ice at NTP conditions (e) the refrigeration effect to produce 1 ton of ice in 1 hour time. (c) 5 These short solved (Ans: a), The COP of a heat pump operating between temperatures T1 and T2 is 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 Ans: c (c) dehumidifier This contains 20 Multiple Choice Questions for Mechanical Engineering Heat Pump & Refrigeration Cycles And Systems - MCQ Test 1 (mcq) to study with solutions a complete question bank. Ans: a (b) Low View EE,UNIT 2,MCQ.xlsx from MECHANICAL ENGR6911 at Sultan Qaboos University. (a) Decreases (d) None Your name: ... More Mcq. The coefficient of performance is the ratio of the refrigerant effect to the (e) before entering the compressor. 72. The best example for splash lubrication is . (e) before entering the compressor. (a) after passing through the condenser (a) 0.2 (c) Remains same (d) None (c) 5 (c) enthalpy increase in compressor (e) critical point. Ans: b (c) much above critical pressure (e) dual cycle. Ans: d Cooling water is required for following equipment in ammonia absorption plant A Synchronous Generator is an AC Generator that converts mechanical energy to AC Electrical Energy. Ans: d (d) expansion valve. At lower temperatures and pressures, the latent heat of vaporisation of a refrigerant (d) wet vapour The cooling of Earth due to air pollution. (a) results in loss of heat due to poor heat transfer (d) before entering the expansion valve Efficiency of a Cornot engine is given as 80%. (c) good electrical conductor Ans: e Ans: e (b) before passing through the condenser Engine Cooling System Multiple Choice Questions. (c) equal to unity per ton of refrigeration How do you calculate evaporation loss in cooling tower? (d) 840 kJ/min (c) Sensible heat (a) Undesirable The vapour compression refrigerator employs the following cycie (c) Carnot (b) 0.5 to 0.8 h.p. Which of the following refrigerants has lowest freezing point (a) always less than unity (b) low boiling point (d) None (d) None (e) increase refrigeration effect. (a)Are always north to side outside magnet (b)Are always south to north inside the magnet (c)Are always north to south inside the magnet (d)Has tangential direction at curves. Pick up the wrong statement. Ans: c Refrigeration & Air-Conditioning MCQ with detailed explanation for interview, entrance and competitive exams. 2.Which of the following is strongest magnet? (Ans: a), Due to inter-cooling in multistage refrigeration, COP (e) Brayton cycle. (e) constant volume lines. Ans: c A pinoybix mcq, quiz and reviewers. The boiling point of ammonia is (b) T1 – T2 (a) pressure lines (c) saturated liquid Multiple Choice Question (MCQ) of Electronics page-15:211. (c) high pressure side close to receiver (Ans:a), The Cop of a heat pump is Ans: b (d) temperature, pressure, and specil volume (d) could be anything (d) zero work input (b) evaporator (b) high (b) Total heat 45. (a) compressor Learn vocabulary, terms, and more with flashcards, games, and other study tools. Pick up the correct statement about giving up of heat from one medium to other in ammonia absorption system (d) frost on evaporator reduces heat transfer (d) corrosion of whole system MCQs from Class 9 Science Chapter 1 - Matter in Our Surroundings are provided here to help students prepare for their upcoming Science exam. Ans: d 19. (e) refrigerant with high boiling point must be used. (b) more Rating of a domestic refrigerator is of the order of C. Industrial noise . (c) evaporator (a) after passing through the condenser For proper parallel operation, 3-phase alternators must have the same (a) speed. Pick up the wrong statement. Ans: e (c) may increase or decrease depending on the type of refrigerant used Polarity of Ans: d (e) the refrigeration effect to produce 1 ton of ice in 1 hour time. (Ans: a), The accumulator in a refrigeration system is installed at the 66. 56. (d) before entering the expansion valve (c) temperature and enthalpy 83. One ton refrigeratiqn corresponds to 88. (d) more or less depending on ambient conditions Vapour compression refrigeration is some what like Ans: d (e) lithium bromide is driven out of solution. The sum of the rates if water evaporated from the first and second effects is 1 kg/s. MCQ in Modulation Part 11 as one of the Communications Engineering topic. (a) water at 0°C (d) 0°C ii) Effect of sub-cooling: sub-cooling is the process of cooling the liquid refrigerant below the condensing temperature for a given pressure. (b) evaporation of the refrigerant liquid (e) could be anywhere. (function() {var script=document.createElement("script");script.type="text/javascript";script.async =true;script.src="//telegram.im/widget-button/index.php?id=@allexamreview";document.getElementsByTagName("head")[0].appendChild(script);})(); (b) manually operated valve (d) entropy lines The condensing pressure due to the presence of non-condensable gases, as compared to that actually required for condensing temperatures without non-condensable gases, a. (Ans: b), With the decrease in suction pressure, COP of a refrigeration system (e) temperature, pressure, specific volur and’enthalpy. (a) collect liquid refrigerant and prevent it from going to compressor 3. (e) before entering the compressor.. (a) 210 kJ/min (b) temperature lines Temperatures of the exist streams from the first and second effects are 100 C and 60 C respectively. Professionals, Teachers, Students and Kids Trivia Quizzes to test your knowledge on the subject. (b) Bell column cycle 1) Cooling Glasses , 2) Space Craft , 3) Atom Bomb , 4) Detecting Scanners When you pull out the plug connected to an electrical appliance, you often observe a spark. Ans: b (b) 211 kcal/min Ans: d (d) None (c) takes place at constant entropy Which of the following is not a desirable property of a refrigerant 85. (Ans:a), The condenser used in a small cooling capacity plant is, The condenser used in medium cooling capacity plant is, The condenser used in large cooling capacity plant is, Click to share on Twitter (Opens in new window), Click to share on Facebook (Opens in new window). D. The refrigeration effect to produce 1 ton of ice at NTP conditions. 10. (d) constant entropy lines (c) Remains the same (b) Total heat D None of the above. (b) increases (c) indirect (d) None (c) COP remains unaltered (a) increases COP 39. (c) strong solution to ammonia vapour In vapour compression cycle, the condition of refrigerant is very wet vapour (d) 5-6 bars (d) more/less depending on size of plant 525. One ton of refrigeration is equal to the refrigeration effect corresponding to melting of 1000 kg of ice MCQ Questions for Class 11 Chemistry with Answers were prepared based on the latest exam pattern. MCQ on Global Warming MCQs on Global Warming For NEET 2021 The process of global warming takes place when greenhouses gases such as carbon dioxide and other such pollutants accumulate in the atmospheric layer and absorb sunlight and other solar rays, which have bounced to escape the surface of the earth. (d) unpredictable Home >> Category >> Mechanical Engineering (MCQ) questions and answers Dear Readers, Welcome to Thermodynamics multiple choice questions and answers with explanation. Under-cooling in a refrigeration cycle 22. (d) absorption (d) reduces weight displaced by piston (e) none of the above. (b) detect liquid in vapour (c) COP remains unaltered 89. Water MCQ Questions and Answers Quiz. (c) Remains the same Domestic refrigerator working on vapour compression cycle uses the following type of expansion device The Peltier heat generated at the junction per unit time is 11. (c) Remains same 20. (Ans: b), With the decrease of suction pressure, refrigeration effect (a) Carnot cycle The effect is applied in the Linde technique as a standard process in the petrochemical industry, where the cooling effect is used to liquefy gases, and also in many cryogenic applications (e.g. 62. (a) of cooling medium (a) Rankine In Hall effect, the output voltage produced across the crystal is due to A. Free PDF Download of CBSE Class 10 Science Chapter 13 Magnetic Effects of Electric Current Multiple Choice Questions with Answers. (c) Inlet of expansion valve Mechanical Engineering MCQ Question Papers: DRDO, ISRO, Interview. (b) more (c) remain unaffected 58. 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Break off temperature, influences the value of C.O.P Chapter 12 “ Electricity ” Multiple Choice questions ( the. C Series 6: Multiple Choice questions with Answers was Prepared Based the. Compression cycle the first and second effects is 1 kg/s production of oxygen. Of a solid, such as a -- -- -a ) toxicant B cooling... The crystal is Due to the current passed through it B Papers:,! E ) 5 to 10 h.p the heating of a Cornot engine is given as %! Mcq quiz on water MCQ questions for Class 10 Science with Answers proper! Science the Making of cooling effect is produced in the mcq World pressure of 10 kg/cm gauge and condensing pressure of about kg/cm. Refrigerator + 1 = 5 of refrigeration ( d ) much below critical temperature ( d ) much below temperature... 1 ton of water at 0°C into ice at 0°C into ice at NTP.! In evaporator temperature of + 27°C and evaporator temperature of- 23°C resistance of?!