(d) more or less depending on ambient conditions (b) is more than 1 (a) 10% (c) water will evaporate (a) inflammable (e) lithium bromide is driven out of solution. (e) Hydrocarbon refrigerant. Formation of frost on evaporator in refrigerator (c) after passing through the expansion throttle valve (b) Total heat roofs of buildings; tall water towers; town level; high lands (b) lithium bromide plant can’t operate below 0°C (e) such a cycle does not exist. On account of the effect of the inductance in pressure coil, the wattmeter at leading power factor tends to read (a) low (b) high (c) normally (d) erratically. Learn vocabulary, terms, and more with flashcards, games, and other study tools. (b) low boiling point Ans: d (c) saturated liquid (Ans: b), As evaporator temperature decreases in vapor compression refrigeration, COP Ans: b Ans: c Refrigeration is measured in tons of refrigeration. (e) all of the above. Given below are basic MCQ (with answers) on Synchronous Generator. (c) toxic and non-inflammable (d) may be higher or lower depending upon the nature of non-condensable gases In a flooded evaporator refrigerator, an accumulator at suction of compressor is used to (Ans:a), The cooling effect is higher in a Mechanical Engineering Refrigeration and Air Conditioning Important MCQ, 1. 53. ii) Effect of sub-cooling: sub-cooling is the process of cooling the liquid refrigerant below the condensing temperature for a given pressure. (d) None Ans: b (c) above which liquid becomes vapour (a) small 83. One of the purposes of sub-cooling the liquid refrigerant is to (b) evaporator (e) before entering the compressor.. All MCQs are important for exams as well as school tests. 37. Ans: d (d) 6 Ans: d Since refrigerant is boiled, its form is changing from fluid to vapor (evaporation process). (e) 3 : 1 28. 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=4194&action=edit       MCQ non-conventional refrigeration. Ans: d (Ans: a), As evaporator pressure decreases in vapor compression refrigeration, COP Ans: c (e) could be anywhere. View Answer Answer: Danger of corrosion ... D Carry away the heat produced in bearing . MCQ Questions for Class 11 Chemistry with Answers were prepared based on the latest exam pattern. 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. (a) Increases (b) low (c) remain unaffected c) The saturation voltage V CE for silicon transistor is same as that for germanium. It has an insufficient cooling effect Due to the high cooling effect, the cutting edges of the tool break off 11) Which one of the following frictions occurs in an un-lubricated journal bearing? (b) work done by compressor (a) Increases (b) Decreases If the distances of the standard source S and the test source T from the photometer head are L 1 and L 2, respectively, then, according to the inverse square law, if the illumination on both the sides of the screen are equal then the candlepower of the source is proportional to the square of the distance between the source and the photometer head. (e) at which all the three phases exist together. In Hall effect, the output voltage produced across the crystal is due to A. NEET MCQ tissue-culture PDF:-Download the PDF Here. 31. (c) Not known’ Ans: c unit, one ton of refrigeration is equal to (d) corrosion of whole system (e) none of the above. (a) Ammonia (c) is immaterial Blowholes are present in the castings 2. Subscribe to our mailing list and get interesting stuff and updates to your email inbox. 61. (a) -100°C 33. (e) condensing temperature of ice. This sheet is for 2 Mark questions S.r No Question e.g 1 Write down question 1 What type of steam is produced … (c) 5 63. (e) dual cycle. (d) reduces weight displaced by piston D. Ozone gas is produced View Answer C. Works as a safety valve for surges Your Comments Your name: Your Email: Your Comments: 42. These short solved (d) before entering the expansion valve Refrigeration in aeroplanes usually employs the following refrigerant (a) compressor C. noise killing . Ans: d 13. Cooling tower effectiveness in percentage is the ratio of range, to the ideal range, i.e., difference between cooling water inlet temperature and ambient wet bulb temperature or in other words it is = Range / (Range + Approach). (c) cooling below 0°C 19. 29. In an Internal Combustion engine, about _____ of the latent heat produced during combustion passes through the cylinder wall into the cooling system. (a) Bell Coleman Cycle (a) Increases (Ans: b), High degree of super heat in vapor compression refrigeration, COP If the- cycle direction be reversed, what will be the value of COP of reversed Carnot cycle (a) vapour compression (b) it permits complete evaporation in the evaporator (b) more (b) increases (c) Reversed Rankine 31. (d) low latent heat In motorcycles, the following type of cooling system … MCQ Questions for Class 10 Social Science with Answers was Prepared Based on Latest Exam Pattern. (d) gas liquefaction How do you calculate evaporation loss in cooling tower? (b) saturation point of liquid 3) An aqueous suspension at 60 C is fed to the first effect of a double effect forward feed evaporator with a mass flow rate of 1.25 kg/s. (d) piston type reciprocating Ans: e Vertical lines on pressure-enthalpy chart show constant (Ans:c), In vapor compression refrigeration, cooling effect is produced by 4. (e) constant volume lines. (a) Decreases 86. (e) depends upon the weather conditions. Ans: c 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: d For obtaining high COP, the pressure range of compressor should be 65. Ans: b The pattern of the magnetic field produced by the straight current carrying conducting wire is (a) in the direction opposite to the current (b) in the direction … (e) before entering the compressor. Zero power factor method […] (b) Carnot (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). (b) 0.5 to 0.8 h.p. (d) Superheat and sensible heat of a. refrigerant are same (a) atmospheric pressure (d) 0.25 (a) Tow specific heat of liquid Temperatures of the exist streams from the first and second effects are 100 C and 60 C respectively. (c) kVA rating. The C.O.P. CBSE Class 10 Science Book Chapter 12 “Electricity” Multiple Choice Questions ‌(MCQs‌) with Answers. (c) more than 10 kg (b) as low as possible (3 to 11°C) Light is produced C. Heat is produced D. Air is produced . a) The saturation voltage V CF of silicon transistor is more than germanium transistor. (e) breakdown of refrigerant. b. 91. (c) >10 (d) Brine (b) <1 7.The relative coefficient of performance is (e) receiver. Chemical effect of current B. 43. (c) dehumidifier Ans: d (c) evaparator (b) sub-cooled liquid 35. (a) 0.1 ton Which of the following statement is true? Round the clock cooling of an apartment having a load of 300 MJ/day requires an air-conditioning plant of … (c) lowers compressor capacity because vapour is lighter (d) 0°C Q11. of a domestic refrigerator in comparison to domestic air conditioner will be (e) none of the above. (b) 1 : 9 39. (d) very little power consumption (d) None (c) Sensible heat (e) none of the above. Pick up the wrong statement. (b) decreases COP The best example for splash lubrication is . 10%. (e) 105 kJ/min. (b) axial Ammonia-absorption refrigeration cycle requires Ans: d (b) Decreases MCQ Questions for Class 10 Magnetic Effect of Electric Current Question 10. a. (b) much below critical pressure 22. 17. (a) 0.2 (a) evaporator Ans: e (c) absorber Refrigeration & Air Conditioning (2161908) Department of Mechanical Engineering Darshan Institute of Engineering & Technology, Rajkot 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 ANSWER: C 46. (d) all of the above (e) 1000 kcal/day. 94. Mass flow ratio of NH3 in comparison to Freon-12 for same refrigeration load and same temperature limits is of the order of The effect of considering friction losses in steam nozzle for the same pressure ratio leads to (a) increase in exit velocity from the nozzle ... Nuclear Power Plant Multiple Choice Questions Multiple Choice Questions Nuclear Power Plant Multiple … (b) less Slideways of a machine are frequently lubricated by . If the amount … (c) perfectly tight vapour seal should be used (d) None (a) Carnot cycle View Answer Answer: Carry away the heat produced in bearing 36 The most important quality of any lubricant is A Specific heat . (c) after passing through the expansion or throttle valve Moisture in freon refrigeration system causes (d) non-toxic and inflammable (a) Temperature of medium being cooled must be below that of the evaporator 81. (c) compressor (Ans: b), To improve the COP of a refrigeration system, the super heating in the evaporator should be (c) COP remains unaltered In refrigerators, the temperature difference between the evaporating refrigerant and the medium being cooled should be The change in evaporator temperature in a refrigeration cycle, as compared to change in condenser temperature, influences the value of C.O.P. (c) thermostatic valve (d) can be avoided by proper design (a) Latent heat Condensing temperature in a refrigerator is the temperature 45. b- muscle glycogen. (e) unpredictable. Ans: b (c) it results in high volumetirc and mechanical efficiency (a) 211 kJ/min (e) under some conditions small and under some conditions high. 72. (a) > 4 (a) Carnot cycle Ans: b (d) before entering the expansion valve Magnetic Effect of Electric Current Class 10 MCQ Question 1. (e) takes place at constant pressure. (Ans:a) Ans: a (c) 80 kcal/min Ans: a A refrigerant should have (a) Tow specific heat of liquid ... One ton of refrigeration is equal to the refrigeration effect corresponding to melting of 1000 kg of ice (a) in 1 hour (b) in 1 minute (c) in 24 hours (d) in 12 hours (e) in 10 hours. (c) is equal to 1 (b) smaller cabinet should be used ... the heating effect will be: A. Home >> Category >> Mechanical Engineering (MCQ) questions and answers Dear Readers, Welcome to Thermodynamics multiple choice questions and answers with explanation. (e) unpredictable. (e) none of the above. When a current is made to flow through a junction between two conductors, A and B, heat may be generated or removed at the junction. (b) less MCQ quiz on Water multiple choice questions and answers on water MCQ questions quiz on water objectives questions with answer test pdf. (b) T1 – T2 Ans: a Choose the wrong statement Engines): MCQ question is the important chapter for a Mechanical Engineering and GATE students. (a) Inlet of compressor (e) less for small capacity and more for high capacity. For better COP of refrigerator, the pressure range corresponding to temperature in evaporator and condenser must be (d) capillary tubes At lower temperatures and pressures, the latent heat of vaporisation of a refrigerant Students can solve NCERT Class 10 Social Science The Making of Global World Multiple Choice Questions with Answers to know their preparation level. (e) none of the above. 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