In a flooded evaporator refrigerator, an accumulator at suction of compressor is used to Vertical lines on pressure-enthalpy chart show constant (a) A refrigerant should have low latent heat (a) bigger (a) collect liquid refrigerant and prevent it from going to compressor Refrigeration & Air-Conditioning MCQ Question with Answer Refrigeration & Air-Conditioning MCQ with detailed explanation for interview, entrance and competitive exams. The refrigeration effect in a dry evaporator compared to flooded evaporator in a similar plant is (e) none of the above. (b) more Subscribe to our mailing list and get interesting stuff and updates to your email inbox. (d) more for small capacity and less for high capacity May 23, 2018 - Engineering, Competitive Exams & Jobs. (b) takes place at constant temperature (d) low pressure side near receiver (c) in 24 hours (c) may increase or decrease depending on the type of refrigerant used (c) – 33.3°C (a) after passing through the condenser (c) expansion valve and evaporator (d) at which refrigerant gas becomes liquid (d) before entering the expansion valve 44. (e) depends upon the weather conditions. (c) 10 tons (d) expansion valve. (a) temperature, pressure and enthalpy These short objective type questions with answers are very important for competitive exams. (e) volume lines. (b) evaporator A Textbook of Refrigeration and Air Conditioning By R.S. (b) above which liquid becomes gas The COP of a domestic refrigerator (c) above which liquid becomes vapour (d) may increase or decrease depending on the type of refrigerant used Practice Test: Question Set - 02 1. (c) Freon-22 (b) of freezing zone A one tonne refrigerating machine means that (A) One tonne is the total ... I.C Engines Multiple Choice Questions with Answers - Set 02. (e) such a cycle does not exist. View Answer. MCQs of Psychrometry. (e) condensing temperature of ice. (c) after passing through the expansion or throttle valve (d) anything Ans: d The condensing pressure due to the presence of non-condensable gases, as compared to that actually required for condensing temperatures without non-condensable gases, per ton of refrigeration (b) more (c) indirect READ PAPER. Herewith we have shared the Refrigeration and Air-conditioning - Mechanical Engineering Multiple choice Questions and Answers pdf. (d) expansion valve 58. (a) increase (c) more than 10 kg Explanation are given for understanding. 45. Become familiar with Educational Testing Service. (e) expansion valve. (e) before entering the compressor. (a) same No.1 website for Civil Engineering study materials, Herewith we have shared the Refrigeration and Air-conditioning – Mechanical Engineering Multiple choice Questions and Answers pdf. Refrigeration & Air Conditioning MCQ Questions Mechanical Engineering . Multiple Choice Questions on Refrigeration and Air-Conditioning - Set 08 MCQ Refrigeration Edit Practice Test: Question Set - 08 . Ans: c One ton of refrigeration is equal to the refrigeration effect corresponding to melting of 1000 kg of ice (c) absorber (e) takes place at constant pressure. (d) all of the above This book is best for understanding the proper working and\efficincy calculating of the refrigerator in numerical based. Refrigeration and Air Conditioning, RAC Questions For placement and exam preparations, MCQs, Mock tests, Engineering Class handwritten notes, exam notes, previous year questions, PDF free download (d) Freon-22 36. 77. (c) C02 c) Water Cooled. One ton of refrigeration is equal to the refrigeration … (b) less Ans: d 46. MCQ No - 1. In vapour compression cycle, the conditii of refrigerant is saturated liquid (e) none of the above. (a) strong solution to weak solution (a) same (b) NH3 (e) all of the above. (a) lowers evaporation temperature A standard ice point temperature corresponds to the temperature of (a) decreases (a) compressor (e) none of the above. 1. (e) ammonia. 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 … (b) Carnot A. after passing through the condenser B. before passing through the condenser C. after passing through the expansion or throttle valve D. before [entering the expansion valve E. before entering the compressor. Ans: b (d) weak solution mixes with strong solution (e) S02. of a refrigeration cycle with lowering of condenser temperature, keeping the evaporator temperature constant, will 19 Full PDFs related to this paper. (b) will be lower (a) Carnot cycle Watch Queue Queue. Accumulators should have adequate volume to store refrigerant charge at least (d) large latent heat (b) commercial refrigerators (c) is equal to 1 (e) unpredictable. (e) Brayton cycle. Ans: b a) Air cooled. (d) 40 tons (d) 1 : 3 The refrigerant used is Ans: a In S.J. 95. Next . (c) perfectly tight vapour seal should be used The lower horizontal line of the refrigeration cycle plotted on pressure-enthalpy-diagram represents (b) more than or equal to 3.65 kg (d) driers (e) 3 : 1 Download. Ans: e View Answer. 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(a) Ammonia (e) unpredictable. Refrigeration Literal meaning of refrigeration is the production of cold confinement relative to its surroundings. (b) delivery of compressor (c) evaporator (a) compression Refrigeration & Air Conditioning MCQ Questions Mechanical Engineering . Ans: a Ans: b (b) Stirling (b) a gas will immediately liquefy In a refrigeration system, heat absorbed in comparison to heat rejected is Refrigeration And Air Conditioning MCQ question is the important chapter for a Mechanical Engineering and GATE students. (b) before passing through the condenser (a) it permits higher speeds to be used (a) 50 kcal/min The advantage of dry compression is that (b) increases power required per ton of refrigeration Explanation are given for understanding. (e) refrigerant with high boiling point must be used. 71. 93. (e) less for small capacity and more for high capacity. Ans: b (a) small (e) dual cycle. (d) 80 kcal/hr 11. Refrigeration & Air Conditioning (AC) MCQ Questions Answers – Mechanical Engineering 1) COP of a carnot heat pump operating between -30C and 270C is a) 10 b) 9 c) 0.111 d) 0.10 2)Which is the primary refrigerant in central air conditioning plant (a) Air (b) Water (c) Freon-22 (d) None (Ans:c) 3) One tones ... Read more Refrigeration & Air Conditioning MCQ Questions … (e) none of the above. 25. 39. (e) Hydrocarbon refrigerant. (a) -100°C temperature Refrigeration And Air Conditioning MCQ question is the important chapter for a Mechanical Engineering and GATE students. It is very useful for all kind of GATE, SSC, ESE and other competitive examinations, (adsbygoogle = window.adsbygoogle || []).push({}); (c) freezing automatic regulating valve (c) high latent heat of vaporisation 75. (e) 1-actual COP/fheoretical COP. 28. Ans: d (c) carnot cycle (a) critical pressure of refrigerant The boiling point of ammonia is Refrigeration and Air Conditioning (2161908) MCQ. (d) before entering the expansion valve 52. (c) after passing through the expansion or throttle valve (a) Co2 (d) 75% Ans: a 47. An important characteristic of absorption system of refrigeration is (d) before [entering the expansion valve Ans: d Ans: b (e) 100%. (b) much below critical pressure 14. Air Conditioning refers to the treatment of air so as to simultaneously control its temperature, moisture content, cleanliness, odour and circulation, as required by occupants, (c) C02 Pick up the correct statement about giving up of heat from one medium to other in ammonia absorption system (d) expansion valve Refrigeration systems are also used extensively for providing thermal comfort to human beings by means of air conditioning. रघुबेन्द्र सिंह. 65. 90. Ans: b 82. Ans: b (c) temperature and enthalpy Refrigeration and Air Conditioning Questions Answers. (a) ineffective refrigeration 0. 20. 62. (b) expansion valve The COP of a vapour compression plant in comparison to vapour absorption plant is (a) receiver One ton refrigeratiqn corresponds to 37. (b) 1.2 Ans: a Johana C Siliwire. A. liquid B. sub-cooled liquid C. saturated liquid D. wet vapour E. dry vapour. Choose the correct statement In vapour compression cycle, the condition of refrigerant is very wet vapour Multiple Choice Questions with Answers on Refrigeration and Air-Conditioning - Set 07 Practice Test: Question Set - 07 1. 27. (c) Rankine cycle Which of the following is not a desirable property of a refrigerant Choose the wrong statement (c) equally. (e) unpredictable. 87. Air refrigeration cycle is used in (a) high Ans: c (b) less Thermal conductivity of a material may be defined as the heat conducted in unit time across unit area … The vapour … (a) halide torch which on detection produces greenish flame lighting (b) evaporator tubes of a domestic refrigerator in comparison to domestic air conditioner will be (d) unpredictable (c) is immaterial Refrigeration and air-conditioning is the subject which deals with the techniques to control the environments of the living and non-living subjects and thus provide them comforts to enable them to perform better and have longer lives. 3. (c) toxic and non-inflammable 35. (a) liquid 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. (d) non-toxic and inflammable The coefficient of performance is the ratio of the refrigerant effect to the 40. Ans: a Pick up the wrong statement. (c) much above critical pressure Critical pressure of a liquid is the pressure (b) before passing through the condenser The C.O.P. Ans: d In vapour compression cycle the condition off refrigerant is dry saturated vapour Ans: c (e) none of the above. (c) 5 1. 0. (b) axial If the- cycle direction be reversed, what will be the value of COP of reversed Carnot cycle (a) Freon-11 Ans: a. (d) frost on evaporator reduces heat transfer (c) nearly same work input as for vapour compression cycle (d) more/less depending on size of plant (c) Precooling and subcooling bf refrigerant are same (d) can be avoided by proper design (d) 6 (e) none of the above. 55. (e) unperdictable. Ans: d Short horizontal lines on pressure-enthalpy chart show (c) Freon 50. Which of the following refrigerants has lowest freezing point (b) decreases COF Absorption system normally uses the following refrigerant Most of the domestic refrigerators work on the following refrigeration system (d) reduces weight displaced by piston (d) ammonia vapour to weak solution (d) near critical pressure (c) 9 : 1 (c) at critica. (d) in 12 hours 69. (d) concentration of solution coming out of lithium bromide generator is more in comparison to that entering the generator (d) there is no such consideration The general rule for rating refrigeration systems (excepting for C02 system) is to approximate following h.p. (d) Bell-coleman Allowable pressure on high-pressure side or ammonia absorption system is of the order of (a) pressure lines (a) heat of compression (b) specific volume and enthalpy (c) water will evaporate (b) the cooling effect produced by melting 1 ton of ice Reducing suction pressure in refrigeration cycle (e) constant volume lines. (a) vapour compression Efficiency of a Cornot engine is given as 80%. Page-1 section-5 (c) good electrical conductor (b) increases heat transfer rate refrigeration and air conditioning mcq pdf Refrigeration and Air Conditioning 19 / 22. (b) 0.5 to 0.8 h.p. MCQs of Load Analysis. A refrigeration cycle operates between condenser temperature of + 27°C and evaporator temperature of- 23°C. (e) 5 to 10 h.p. (c) 0.5 (d) 840 kJ/min (d) capillary tube (e) could be anywhere. (d) other factors decide COP (d) triple point 12. (b) saturation point of liquid (a) 0.2 Ans: d KS3 Physics Quiz on HEATING and COOLING 8I. 16. Questions Answers''Heat Transfer Refrigeration And Air Conditioning Online June 5th, 2018 - Heat Transfer Refrigeration And Air Conditioning Online Test Multiple Choice Questions And Answers Online Quiz Onlinebits Interview Questions Answers Pdf' 'A 1 Tech HVAC Multiple Choice Questions 5 … (d) capillary tubes (e) temperature, pressure, specific volur and’enthalpy. (b) 5 tons (d) Superheat and sensible heat of a. refrigerant are same from FreePDfbook.com. 0. (a) increases COP (b) low Aqua ammonia is used as refrigerant in the following type of refrigeration system (e) receiver. (d) any value Ans: a (c) after passing through the expansion or thiottle valve रघुबेन्द्र सिंह. Ans: b (c) lowers compressor capacity because vapour is lighter (e) expansion valve Ans: e 6. (b) compressor and evaporator The evolution of heat of solution takes place in ammonia absorption plant when 21. (b) above critical temperature (c) Reversed Rankine (d) 2 to 5 h.p. b) Ground cooled. Ans: c (a) 1.25 (e) before entering the compressor. Latest Refrigeration and Air Conditioning Questions and Answers 1. (b) ice at – 4°C (e) before entering the compressor.. In vapour compression cycle the condition of refrigerant is superheated vapour _____? (c) less Ans: d Which of the following can be called as a refrigeration process? (c) All solar thermally operated absorption systems are capable only of intermittent operation Ans: b It is very useful for all kind of GATE, SSC, ESE and other competitive examinations Home » Refrigeration and Air Conditioning Online Test » Heat Transfer, Refrigeration and Air Conditioning Online Test – Multiple Choice Questions and Answers. 80. (b) sulphur sticks which on detection gives white smoke A certain refrigerating system has a normal operating suction pressure of 10 kg/cm gauge and condensing pressure of about 67 kg/cm. (d) Brayton (c) thermostatic valve The domestic refrigerator uses following type of compressor 41. (a) more (d) absorption 70. (a) condenser and expansion valve Choose the correct statement? (b) low boiling point 48. (b) high Ans: b (a) centrifugal Ans: a Moisture in freon refrigeration system causes Download. In a vapour compression cycle, the refrigerant immediately after expansion valve is In vapour compression cycle the condition of refrigerant is superheated vapour (b) decreases COP Ans: d (e) unpredictable. 82. Correct Answer . (c) evaparator (b) Freon-11 (c) reversed Camot cycle (e) sensing reduction in pressure. (d) water will never evaporate (a) noisy operation (a) constant pressure lines Ans: d (c) euqal (d) gas liquefaction (d) very little power consumption A refrigeration cycle operates between condenser temperature of + 27°C and evaporator temperature of- 23°C. A refrigerant should have (c) equal to unity For better COP of refrigerator, the pressure range corresponding to temperature in evaporator and condenser must be which will improve your skill. (a) results in loss of heat due to poor heat transfer (d) before entering the expansion valve Which of the following cycles uses air as the refrigerant (a) in 1 hour Ans: e Option – c) 12)Clapeyron equation is a relation between (a) temperature, pressure and enthalpy (b) specific volume and enthalpy (c) temperature and … (b) weak solution to strong solution Rating of a domestic refrigerator is of the order of (c) Carnot 26. (b) 50 kcal/kr (a) compressor Under-cooling in a refrigeration cycle (a) condenser Ans: a (b) before passing through the condenser 59. All Exam Review. 63. (a) Tow specific heat of liquid (c) COP remains unaltered Ans: a (c) evaporator per ton of refrigeration If a heat pump cycle operates between the condenser temperature of +27°C and evaporator temperature of – 23°C, then the Carnot COP will be 64. rick up the incorrect statement (e) increase refrigeration effect. (a) Carnot cycle Ans: d The Cannot coefficient of performance of cycle will be Refrigeration & Air-Conditioning MCQ Question with Answer Refrigeration & Air-Conditioning MCQ with detailed explanation for interview, entrance and competitive exams. Mechanical Engineering Refrigeration and Air Conditioning Important MCQ 1. (e) unpredictable. (a) 1 : 1 Refrigeration and Air Conditioning Interview Questions and Answers pdf :- A refrigeration cycle operates between condenser temperature of + 27°C and evaporator temperature of- 23°C. (d) higher critical temperature (e) compressor discharge. Pick up the wrong statement. Ans: a per ton of refrigeration (b) smaller (e) unpredictable. (e) there is no such criterion. The C.O.P. 1. MCQ No - 1. Ans: c. 52. Ans: a Ans: e Refrigeration and Air Conditioning, Mechanical Engineering Multiple Choice Questions / Objective type questions, MCQ's, with question and answers, download free PDF, Mechanical Engineering, Multiple Choice Questions, Objective type questions, Mechanical Engineering short notes, rapid fire notes, best theory Clapeyron equation is a relation between a) Air cooled. (d) condenser discharge (e) low specific volume of vapour. Ans: a Refrigeration and Air Conditioning. Ans: c O Level Physics MCQs Multiple Choice Questions and. The moisture in a refrigerant is removed by (d) depends upon the make (d) other factors decide COP Ans: c Ans: b (a) after passing through the condenser Next . (a) electrically operated throttling valve Ans: a 94. 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For proper refrigeration in a cabinet, if the temperature and vapour pressure difference between cabinet and atmosphere is high, then (d) more or less depending on ambient conditions (e) before entering the compressor. (e) non-toxic and non-inflammable. 38. Free stuff of Refrigeration & Air Conditioning Mcq, Refrigeration And Air Conditioning Question Bank, Refrigeration And Air Conditioning Old Question Papers, Basic Refrigeration Test Questions, Modern Refrigeration And Air Conditioning Pdf Download, Refrigeration And Air Conditioning 2 Marks Questions in Urdu hindi and English students . (b) direct (b) vapour absorption ASWDC (App, Software & Website Development Center) Darshan Institute of Engineering & Technology (DIET) ... Refrigeration and Air Conditioning (2161908) MCQ. (c) compression of the refrigerant vapour 33. (b) safety relief valve A refrigerant should have low latent heat B. 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