Ans: d, 31. (b) much below critical pressure (e) 3 : 1 They may work in the design in technical offices or in the installation in contracting companies. (d) 40 tons (a) liquid The suction pipe diameter of refrigerating unit compressor in comparison to delivery side is (a) after passing through the condenser (e) unpredictable. (e) receiver. Ans: b, 59. (e) none of the above. (b) decreases COP Refrigeration and Air conditioner interview questions for utility Operator and engineer. (a) lower than atmospheric pressure (c) total heat lines (a) after passing through the condenser Formation of frost on evaporator in refrigerator (a) results in loss of heat due to poor heat transfer (b) increases heat transfer rate (c) is immaterial (d) can (b) 5 tons Freon group of refrigerants ... 100 TOP Refrigeration and Air Conditioning Multiple choice Questions and Answers pdf 71. (d) smelling (a) halide torch which on detection produces greenish flame lighting (c) remains same 2. Domestic refrigerator working on vapour compression cycle uses the following type of expansion device Ans: d, 35. This file is a worksheet that you can download and print to write some ideas you have about important behavioral questions. (e) breakdown of refrigerant. (c) remain unaffected (d) concentration of solution coming out of lithium bromide generator is more in comparison to that entering the generator (c) 50% Technical Questions If possible have a technical person with you for the interview, they can ask probing questions and get a good understanding if the person knows what they are talking about or not. per ton of refrigeration Most Asked Technical Basic CIVIL | Mechanical | CSE | EEE | ECE | IT | Chemical | Medical MBBS Jobs Online Quiz Tests for Freshers Experienced. Ans: b, 7. (e) unpredictable. (a) noisy operation (e) non-inflammable. Ans: d, 34. (a) ineffective refrigeration (d) the refrigeration effect to produce 1 ton of ice at NTP conditions (b) vapour absorption (b) increases power required per ton of refrigeration (a) vapour compression (b) manually operated valve (c) above which liquid becomes vapour (e) under some conditions small and under some conditions high. 250+ Air Conditioning And Refrigeration Interview Questions and Answers, Question1: What will be the relative humidity at saturation point? Ans: e, 4. (c) may increase or decrease depending on the type of refrigerant used The refrigerant for a refrigerator should have (a) Ammonia Latest Refrigeration and Air Conditioning Questions and Answers 1. Ans: b, 66. (c) 80 kcal/min (e) 100 tons. Ans: b, 2. (c) absorber This is the mechanical engineering questions and answers section on "Heat Transfer, Refrigeration and Air Conditioning" with explanation for various interview, competitive examination and entrance test. (d) before entering the expansion valve (c) Freon Condensing temperature in a refrigerator is the temperature (a) above which liquid will remain liquid (b) high (d) ensure that only liquid and not the vapour enters the expansion (throttling) valve (d) 1-actual COP x theoretical COP (b) of freezing zone (a) 210 kJ/min Ans: d, 92. (b) increases This is the mechanical engineering questions and answers section on "Heat Transfer, Refrigeration and Air Conditioning" with explanation for various interview, competitive examination and entrance test. (b) high power consumption Question2: Explain the Principle of refrigeration? (c) temperature and enthalpy (e) there is no such restriction. (b) evaporation of the refrigerant liquid (e) 7-10 bars. Choose the wrong statement A standard ice point temperature corresponds to the temperature of Ans: a, 24. (b) before passing through the condenser Famous Heat Transfer, Refrigeration and Air Conditioning multiple choice question for Technology associate engineering and vocational training institute students to give a job exam. Take the Quiz and improve your overall Physics. (c) 1 to 2 h.p. (e) none of the above. (b) as low as possible (3 to 11°C) (c) non-inflammable and toxic (d) low latent heat (a) atmospheric pressure (e) unpredictable. On the pressure-enthalpy diagram, condensation and desuperheating is represented by a horizontal line because the process (b) safety relief valve (a) very little work input The attached PDF contains all questions asked in previous years of Mechanical Engineering (ME) GATE Exam for the topic - Refrigeration & Air-conditioning along with Answers. (c) 2-4 bars (e) constant volume lines. The higher temperature in vapour compression cycle occurs at (d) higher critical temperature (d) before entering the expansion valve Refrigeration and Air Conditioning Interview Questions and Answers pdf:-46. Multiple Choice Questions on Refrigeration and Air ... TOP 95+ Refrigeration and Air Conditioning Multiple choice ... MCQs preparation for Engineering Competitive Exams. Ans: d, 83. (a) more (b) smaller cabinet should be used (c) lithium bromide mixes with ammonia In refrigerators, the temperature difference between the evaporating refrigerant and the medium being cooled should be (d) Freon-22 (e) none of the above. In this post, you can reference some of the most common interview questions for a air conditioning technician interview along with appropriate answer samples. (d) collect vapours Ans: e, 72. (d) 2 to 5 h.p. 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 95 TOP Refrigeration and Air Conditioning Mechanical. Ans: b, 44. (a) critical pressure of refrigerant (b) 25% (a) A refrigerant should have low latent heat (c) reversed Camot cycle Home Aptitude Logical (e) before entering the compressor. (a) high, of the order of 25° (a) high sensible heat Home » Refrigeration and Air Conditioning Objective type Questions and Answers » 95 TOP Refrigeration and Air Conditioning - Mechanical Engineering Multiple choice Questions and Answers List Sunday, 31 August 2014. Below are the list of top Refrigeration and Air Conditioning Interview Questions and Answers pdf free download for freshers & experienced engineering students.Refrigeration and Air Conditioning Mcqs Objective Questions with Answers. (a) compression (d) weak solution mixes with strong solution An HVAC engineer's job duties can include the design, installation, maintenance, and repair of heating, ventilation, air conditioning, cooling, and refrigeration systems. (d) more for small capacity and less for high capacity (e) there is no such criterion. (e) unpredictable. On the pressure-enthalpy diagram, condensation and desuperheating is represented by a horizontal line because the process. (c) 420 kJ/min (b) before passing through the condensei (d) Brayton (d) Air Ans: c, 52. Ans: c, 26. (d) very little power consumption (b) Refrigerant leaves the condenser as liquid (b) always more than unity (d) at which refrigerant gas becomes liquid (a) -100°C Download Refrigeration & Air Conditioning MCQ’s 2020 Quiz and Free refrigeration and air conditioning interview questions and answers pdf Refrigeration and air conditioning question bank new collection of mcqs online. (c) 0.5 (d) Erricson cycle The Cannot coefficient of performance of cycle will be (d) depends upon the make In S.J. (d) anything (e) at which all the three phases exist together. (b) If operating temperature of system is low, then refrigerant with low boiling point should be used per ton refrigeration. 5. Ans: e, 39. (e) none of the above. (e) condenser, absorber and separator (rectifier). Clapeyron equation is applicable for registration at per ton of refrigeration Refrigeration and air conditioning Online Notes , Objective and Interview Questions Refrigeration and air-conditioning (RAC) engineers design, install and maintain cooling systems in buildings like supermarkets, offices, schools, hospitals and food processing plants. In a vapor compression cycle, the refrigerant immediately after expansion valve is If the evaporator temperature of a plant is lowered, keeping the condenser temperature constant, the h.p. Ans: a, 80. (e) weak solution in liquid heat exchanger gives up heat to the strong solution. The condensing pressure due to the presence of non-condensable gases, as compared to that actually required for condensing temperatures without non-condensable gases, (e) refrigerant with high boiling point must be used. Ans: a, 6. AIR CONDITIONING & REFRIGERATION Questions 300+ TOP AIR CONDITIONING & REFRIGERATION Interview Questions and Answers iqapdf June 28, 2019 No Comments 1. (c) it results in high volumetirc and mechanical efficiency Best Refrigeration and Air Conditioning Interview Questions and Answers Dear Readers, Welcome to Refrigeration and Air Conditioning Interview Questions and Answers have been designed specially to get you acquainted with the nature of questions you may encounter during your Job interview for the subject of Refrigeration and Air Conditioning Interview Questions. (e) before entering the compressor. (e) 10. (e) none of the above. Ans: a, 93. Ans: d, 30. (e) 105 kJ/min. (d) S02 (d) before entering the expansion valve (d) expansion valve Ans: d, 29. Which of the following cycles uses air as the refrigerant (b) above critical temperature The C.O.P of a refrigeration cycle with increase in evaporator temperature, keeping condenser temperature constant, will per ton of refrigeration Refrigeration in aeroplanes usually employs the following refrigerant (d) toxic (d) 840 kJ/min (a) will be higher (d) wet vapour Multiple Choice Questions with Answers on Refrigeration and Air-Conditioning - Set 07. Latest Refrigeration and Air Conditioning - Mechanical Engineering Multiple choice Questions and Answers pdf 31. Ans: b, 67. (c) evaporator CIVIL | Mechanical | CSE | EEE | ECE | IT | Chemical Online Quiz Tests for Freshers. (b) 21 kJ/min Refrigeration and Air Conditioning Multiple Choice Questions :-1. (a) 1.25 (d) smaller/bigger depending on capacity (b) saturation point of liquid 1. Ans: a, 77. Ans: a, 49. Ans: c, 87. (d) any one of the above Ans: d, 69. (d) condenser and absorber (e) none of the above. (b) specific volume and enthalpy (e) before entering the compressor. (c) COP remains unaltered (d) may be higher or lower depending upon the nature of non-condensable gases (c) increase cooling effect (c) after passing through the expansion or throttle valve Ans: a, 81. (e) increase refrigeration effect. Refrigeration and Air Conditioning Interview Questions and Answers pdf:-46. The vapor pressure of refrigerant should be (c) after passing through the expansion or throttle valve (b) detect liquid in vapour (e) none of the above. (a) Co2 Ans: b, 74. (c) solid and dry ice Formation of frost on evaporator in refrigerator (a) results in loss of heat due to poor heat transfer (b) increases heat transfer rate (c) is immaterial (d) can be avoided by proper design (e) decreases compressor power. Ans: c, 53. (c) less Ans: b, 82. The COP of a domestic refrigerator Ans: c, 78. (e) none of the above. (b) is more than 1 (d) reversed Rankine cycle In a refrigeration system, heat absorbed in comparison to heat rejected is (a) always less than unity (d) capillary tubes (c) enthalpy increase in compressor Ans: d, 62. Ans: d, 56. (a) more (c) Rankine cycle (b) delivery of compressor (b) 0.8 Ans: d, 46. No need to wait for office hours or assignments to be graded to find out where you took a wrong turn. (a) lowers evaporation temperature Multiple Choice Questions with Answers on Refrigeration and Air-Conditioning - Set 07 Practice Test: Question Set - 07 1. (a) less than 2 kg (e) Refrigerant is inside the lubes in case of a direct-expansion chiller. (c) euqal Best Refrigeration and Air Conditioning Objective type Questions and Answers Dear Readers, Welcome to Refrigeration and Air Conditioning Objective Questions and Answers have been designed specially to get you acquainted with the nature of questions you may encounter during your Job interview for the subject of Refrigeration and Air Conditioning Multiple choice Questions. The general rule for rating refrigeration systems (excepting for C02 system) is to approximate following h.p. (e) 33.3°C. (c) – 33.3°C (a) 0.2 (e) heat transfer. The domestic refrigerator uses following type of compressor 95 TOP Refrigeration and Air Conditioning - Mechanical Engineering Multiple choice Questions and Answers List ... Air refrigeration cycle is used in (a) domestic refrigerators (b) commercial refrigerators (c) air conditioning (d) gas liquefaction (e) such a cycle does not exist. Copyright 2020 , Engineering Interview Questions.com, 300+ TOP Refrigeration & Air Conditioning Objective Questions and Answers. (d) other factors decide COP (a) 0.1 to 0.5 h.p. temperature (d) 75% 10. Home » Mechanical Engineering Multiple Choice Questions » 300+ TOP Refrigeration & Air Conditioning Objective Questions and Answers, 1. (e) dual cycle. Ans: c, 75. In vapour compression cycle using NH3 as refrigerant, initial charge is filled at (d) low pressure side near receiver (d) there is no such consideration (d) could be anything (a) a gas will never liquefy (e) S02. (c) 5 For obtaining high COP, the pressure range of compressor should be (b) constant temperature lines (a) compressor (e) Hydrocarbon refrigerant. (d) 5-6 bars (c) Carnot In vapor compression cycle, the condition of refrigerant is very wet vapor (a) of cooling medium Mechanical Technical Interview Questions With Answers – If you have any queries regarding this or having a Similar Question which you think should be included in this collection, kindly let us know by leaving a comment in the comments section and we will get back to you at the earliest. (c) after passing through the expansion throttle valve (b) more In vapor compression cycle the condition off refrigerant is dry saturated vapor The coefficient of performance is the ratio of the refrigerant effect to the (e) takes place at constant pressure. Ans: a, 18. Your email address will not be published. In vapor compression refrigeration system, refrigerant occurs as liquid between (a) high triiscibility with oil (c) C02 of a domestic refrigerator in comparison to domestic air conditioner will be Rating of a domestic refrigerator is of the order of (a) condenser Ans: c, 54. Ans: d, 5. (e) less for small capacity and more for high capacity. (a) is less than 1 (b) it permits complete evaporation in the evaporator (e) none of the above. Mass flow ratio of NH3 in comparison to Freon-12 for same refrigeration load and same temperature limits is of the order of The bank of tubes at the back of domestic refrigerator are If you need more job interview materials, you can reference them at the end of this post. (c) high latent heat of vaporisation Pick up the wrong statement. (c) high pressure side close to receiver (a) domestic refrigerators (d) compressor and condenser (c) compressor (b) compressor and evaporator (e) volume lines. (b) evaporator tubes (d) absorption (a) condenser tubes Ans: d, 22. A refrigeration cycle operates between condenser temperature of + 27°C and evaporator temperature of- 23°C. Ans: a, 64. rick up the incorrect statement The COP of a vapour compression plant in comparison to vapour absorption plant is ... Civil Engineering MCQ with Interview Questions and Answers. (c) is equal to 1 The vapor compression refrigerator employs the following cycie Top 10 refrigeration interview questions with answers. Ans: c, 50. Refrigeration and air conditioning objective type questions and answers - Set 16 MCQ Refrigeration Edit Practice Test: Question Set - 16 1. (a) electrically operated throttling valve Ans: a, 71. (c) dehumidifier Highest temperature encountered in refrigeration cycle should be (a) 0.1 ton (a) collect liquid refrigerant and prevent it from going to compressor Air Conditioning and Refrigeration Interview Questions (a) Tow specific heat of liquid (c) less (e) 10. Ans: a, 91. (a) after passing through the condenser (d) Brine The relative coefficient of performance is (d) water will never evaporate (a) Carnot cycle (a) decreases (d) depends on other factors Required fields are marked *. (e) decreases compressor power. (c) equal The refrigerant used is The advantage of dry compression is that (a) Rankine (b) Reversed Carnot cycle (d) triple point Domestic refrigerator working on vapour compression cycle uses the following type of expansion device Ans: e, 68 Ammonia is 1. (d) unpredictable (c) evaporator (a) increases COP Ans: a, 84. Refrigeration and Air Conditioning | HVAC Interview Question and Answers part 1 Refrigeration and Air Conditioning | HVAC Interview , viva , oral Question and Answers part 1 Read more What are the types Of Air Conditioning | Basic Of Air Conditioning Could you describe the components that make a refrigeration system complete? (c) much above critical pressure Ans: b, 51. (a) ammonia vapour goes into solution (c) All solar thermally operated absorption systems are capable only of intermittent operation (b) weak solution to strong solution (d) zero work input Dear Readers, Welcome to Refrigeration and Air Conditioning Objective Questions and Answers have been designed specially to get you acquainted with the nature of questions you may encounter during your Job interview for the subject of Refrigeration and Air Conditioning Multiple choice Questions. Ans: b, 63. At lower temperatures and pressures, the latent heat of vaporisation of a refrigerant In a refrigeration cycle, the flow of refrigerant is controlled by (c) toxic and non-inflammable Pick up the wrong statement. Pick up the wrong statement. (c) of evaporator (a) same 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. (b) quiet operation These short solved questions or quizzes are provided by Gkseries. (a) it permits higher speeds to be used For proper refrigeration in a cabinet, if the temperature and vapour pressure difference between cabinet and atmosphere is high, then (b) reduce compressor discharge temperature Home MCQ Refrigeration Multiple Choice Questions with Answers on Refrigeration and Air-Conditioning - Set 07 Multiple Choice Questions with Answers on Refrigeration and Air-Conditioning - Set 07 MCQ Refrigeration Edit Practice Test: Question Set - 07. (b) more Air refrigeration operates on (e) none of the above. Ans: a, 11. Ans: a, 10. (b) expansion valve Ans: a, 25. (a) evaporator 1. (e) unpredictable. (b) less The value of COP in vapour compression cycle is usually (b) ammonia vapour is driven out of solution Mechanical Engineering Multiple Choice Questions. Multiple Choice Questions with Answers on Refrigeration ... Refrigeration and Air Conditioning Multiple choice Questions. (a) non-toxic Refrigeration and Air Conditioning Interview Questions and Answers pdf:-46. (c) good electrical conductor Other job interview materials: Below are other useful materials from: topinterviewquestions.info • 29 powerpoint presentation examples, 15 interview role play examples • Free ebook: 145 interview questions and answers pdf download A certain refrigerating system has a normal operating suction pressure of 10 kg/cm gauge and condensing pressure of about 67 kg/cm. Highest pressure encountered in a refrigeration system should be Ans: d, 13. Ans: b, 55. Ans: b, 41. Allowable pressure on high-pressure side or ammonia absorption system is of the order of (a) 1 : 1 (d) any value Formation of frost on evaporator in refrigerator (e) unpredictable. Moisture in freon refrigeration system causes Ans: e, 9. (b) Rankine cycle (b) will be lower (e) none of the above. What types/brands/models Ans: e, 15. Formation of frost on evaporator in refrigerator (a) results in loss of heat due to poor heat transfer (b) increases heat transfer rate (c) is immaterial (d) can (b) ice at – 4°C Multiple Choice Questions on Refrigeration and Air-Conditioning - Set 08 MCQ Refrigeration Edit Practice Test: Question Set - 08 . (d) other factors decide COP (e) none of the above. (d) before entering the expansion valve (e) none of the above. (b) -50°C (b) direct (c) C02 (c) carnot cycle (e) before entering the compressor. (b) sulphur sticks which on detection gives white smoke (e) none of the above. (b) Freon-11 (e) expansion valve (e) 1-actual COP/fheoretical COP. 10/28/2017 95 TOP Refrigeration and Air Conditioning - Mechanical Engineering Multiple choice Questions and Answers List | MCQs preparation for Engin … Questions Answers Questions and Answers Questions Questions pdf, 100 TOP Refrigeration and Air Conditioning Multiple choice Questions and Answers pdf 71. which will improve your skill. 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