(b) 21 kJ/min (c) compression of the refrigerant vapour Ans: a, 8. (d) ensure that only liquid and not the vapour enters the expansion (throttling) valve (d) much below critical temperature The C.O.P. (a) condensation of the refrigerant vapour The Cannot coefficient of performance of cycle will be 9/20/2020 Heat Transfer, Refrigeration and Air Conditioning - Mechanical Engineering Questions and Answers Search. (c) reversed Camot cycle (d) large latent heat Air-Conditioning and Refrigeration Sector PDF 48 pp, 964 Krecording all questions used and answers given for the purposes of meeting the. Efficiency of a Carnot engine is given as 80%. Ans: d, 5. The PDF file has four behavioral interview questions … Ans: b, 48. (a) vapour compression (c) air conditioning (e) such a cycle does not exist. (e) lithium bromide is driven out of solution. (d) very little power consumption (c) perfectly tight vapour seal should be used Ans: c, 65. (a) lithium bromide used in vapour absorption cycle is nonvolatile (d) 2 to 5 h.p. The vapor compression refrigerator employs the following cycie (e) temperature, pressure, specific volur and’enthalpy. CIVIL | Mechanical | CSE | EEE | ECE | IT | Chemical Online Quiz Tests for Freshers. The advantage of dry compression is that (e) none of the above. (c) thermostatic valve On the pressure-enthalpy diagram, condensation and desuperheating is represented by … (a) critical pressure of refrigerant 100 TOP Refrigeration and Air Conditioning Multiple choice ... 300+ TOP Refrigeration & Air Conditioning Multiple Choice ... Online Refrigeration & Air Conditioning MCQ's Quiz | Web Solution, MCQ on Heat Transfer, Refrigeration and Air Conditioning. (b) less (b) slightly above atmospheric pressure (c) actual COP x theoretical COP In vapour compression cycle, the conditii of refrigerant is saturated liquid (b) before passing through the condensei (d) depends upon the make (d) all of the above (b) condenser (c) of evaporator per ton of refrigeration (b) of freezing zone Highest pressure encountered in a refrigeration system should be Ans: a, 71. One ton of refrigeration is equal to the refrigeration effect corresponding to melting of 1000 kg of ice (e) 100 tons. Ans: c, 90. (a) lower than atmospheric pressure Freon group of refrigerants are (A) Inflammable (B) Toxic (C) Non-inflammable and toxic (... Best Refrigeration and Air Conditioning Objective type Questions and Answers. (e) 10. Ans: b. (c) indirect (c) remain unaffected Top 10 refrigeration interview questions with answers. (b) Carnot In a flooded evaporator refrigerator, an accumulator at suction of compressor is used to (d) at which refrigerant gas becomes liquid (b) expansion valve Ans: c, 16. Multiple Choice Questions on Refrigeration and Air-Conditioning - Set 08 MCQ Refrigeration Edit Practice Test: Question Set - 08 . Ans: c, 52. View 6.pdf from ENGINEERIN D12 at Eastern Illinois University. Clapeyron equation is applicable for registration at (c) strong solution to ammonia vapour (a) more (a) bigger cabinet should be used Pick up the wrong statement. (a) Carnot cycle 1. (a) Ammonia (d) reduces weight displaced by piston (b) constant temperature lines (b) saturation point of liquid of compressor required will be (d) non-toxic and inflammable (a) inflammable (e) unpredictable. (c) it results in high volumetirc and mechanical efficiency (a) Co2 One of the purposes of sub-cooling the liquid refrigerant is to One ton of the refrigeration is (b) ice at – 4°C Ans: b, 28. Highest temperature encountered in refrigeration cycle should be (a) decreases (c) temperature and enthalpy Ans: a, 11. Freon group of refrigerants are Latest Refrigeration and Air Conditioning - Mechanical Engineering Multiple choice Questions and Answers pdf 31. (c) 0.5 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. The C.O.P. (a) liquid (a) after passing through the condenser Ans: a, 77. Ans: a, 38. Freon group of refrigerants are (A) Inflammable (B) Toxic (C) Non ... 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. (c) 10 tons (c) absorber (a) small (c) the refrigeration effect to freeze 1 ton of water at 0°C into ice at 0°C in 24 hours (c) toxic and non-inflammable (b) less (b) Rankine cycle (d) driers (a) 1.25 (b) before passing through the condenser (e) condensing temperature of ice. (d) Erricson cycle (b) maximum work input Free download in PDF Refrigeration and Air Conditioning Multiple Choice Questions and Answers for competitive exams. (e) decreases compressor power. Ans: b, 76. (e) unpredictable. A refrigeration cycle operates between condenser temperature of + 27°C and evaporator temperature of- 23°C. (e) ammonia vapour to strong solution. 1. (c) evaparator (b) Refrigerant leaves the condenser as liquid 250+ Air Conditioning And Refrigeration Interview Questions and Answers, Question1: What will be the relative humidity at saturation point? Ans: a, 95. (d) any value Vapor compression refrigeration is some what like 10 Air Conditioning Mechanic Interview Questions Why should we hire you? Ans: c, 94. (b) higher than atmospheric pressure Ans: d, 35. (d) any one of the above (b) decreases COF (c) euqal (e) condenser, absorber and separator (rectifier). One ton refrigeratiqn corresponds to (c) at critica. (b) ammonia vapour is driven out of solution (e) none of the above. (e) none of the above. Rating of a domestic refrigerator is of the order of (e) Refrigerant is inside the lubes in case of a direct-expansion chiller. (d) 80 kcal/hr (e) 1000 kcal/day. Ans: b, 14. Multiple Choice Questions with Answers on Refrigeration and Air-Conditioning - Set 07 Practice Test: Question Set - 07 1. (a) condenser tubes Take the Quiz and improve your overall Physics. 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(d) takes place at constant enthalpy (b) above critical temperature Ans: d, 40. These short objective type questions with answers are very important for competitive exams. (b) increases heat transfer rate For better COP of refrigerator, the pressure range corresponding to temperature in evaporator and condenser must be (a) 0.1 ton Refrigeration and Air Conditioning Interview Questions and Answers pdf:-46. AIR CONDITIONING & REFRIGERATION Questions 300+ TOP AIR CONDITIONING & REFRIGERATION Interview Questions and Answers iqapdf June 28, 2019 No Comments 1. 300+ TOP Refrigeration & Air Conditioning Multiple Choice ... Below are the list of top Refrigeration and Air Conditioning Interview Questions and Answers pdf free download for freshers & experienced engineering students (c) dehumidifier (c) 2-4 bars Ans: e, 39. 6 Identify the main components of refrigeration and air conditioning.The Heating, Ventilation, Air Conditioning Refrigeration program is an. (d) dependent on weather conditions Top refrigeration and air conditioning question and answers Ans: a, 64. rick up the incorrect statement Ans: d, 46. (e) sensing reduction in pressure. (d) Freon-22 They may work in the design in technical offices or in the installation in contracting companies. (c) lowers compressor capacity because vapour is lighter Ans: a, 37. For obtaining high COP, the pressure range of compressor should be Ans: d, 13. On the pressure-enthalpy diagram, condensation and desuperheating is represented by a horizontal line because the process. (e) none of the above. Latest Refrigeration and Air Conditioning Questions and Answers 1. (d) S02 (e) 1-actual COP/fheoretical COP. (b) Stirling (b) commercial refrigerators Ans: a, 81. (c) non-inflammable and toxic Multiple Choice Questions with Answers on Refrigeration and Air-Conditioning - Set 07 Practice Test: Question Set - 07 1. (e) all of the above. (a) after passing through the condenser Ans: e, 3. (d) expansion valve Cooling water is required for following equipment in ammonia absorption plant Ans: e, 68 Ammonia is Ans: d, 29. (e) none of the above. (a) electrically operated throttling valve (c) less 10. refrigeration air conditioning technology Study Sets and. (d) more/less depending on rating (c) – 33.3°C (e) pone of the above. (c) cooling below 0°C (e) before entering the compressor. (d) 1-actual COP x theoretical COP (c) same (d) 0.25 (e) before entering the compressor. Most of the domestic refrigerators work on the following refrigeration system 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) Reversed Rankine (e) unpredictable. (a) compression Ammonia-absorption refrigeration cycle requires In refrigerator, liquid receiver is required between condenser and flow controlling device, if quantity of refrigerant for system is (b) temperature lines Home Aptitude Logical At lower temperatures and pressures, the latent heat of vaporisation of a refrigerant At times, HVAC Technicians assist with refrigeration systems as well. (e) volume lines. (b) evaporator Air refrigeration operates on (a) condenser The COP of a domestic refrigerator (e) Reversed Carnot. (b) -50°C (e) critical point. 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. Domestic refrigerator working on vapour compression cycle uses the following type of expansion device (b) more than or equal to 3.65 kg Freon group of refrigerants ... 100 TOP Refrigeration and Air Conditioning Multiple choice Questions and Answers pdf 71. (c) after passing through the expansion or throttle valve temperature (a) constant pressure lines (a) always less than unity Ans: b, 59. (e) constant volume lines. An important characteristic of absorption system of refrigeration is Which of the following refrigerants has lowest freezing point (d) expansion valve. (d) Bell-coleman (d) the refrigeration effect to produce 1 ton of ice at NTP conditions (d) triple point (a) temperature, pressure and enthalpy (c) Precooling and subcooling bf refrigerant are same Ans: d, 34. (a) A refrigerant should have low latent heat (b) it permits complete evaporation in the evaporator (e) all of the above. (d) toxic of a refrigeration cycle with lowering of condenser temperature, keeping the evaporator temperature constant, will (c) expansion valve and evaporator (a) same Required fields are marked *. Ans: d, 32. 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. (e) mixture of ice and water Under equilibrium conditions. (c) using reagents Ans: b, 44. (e) dual cycle. (c) optimum Engineering interview questions,Mcqs,Objective Questions,Class Notes,Seminor topics,Lab Viva Pdf free download. (e) none of the above. (b) decrease (b) less (e) increase refrigeration effect. (c) carnot cycle In vapor compression refrigeration system, refrigerant occurs as liquid between Air Conditioning and Refrigeration Interview Questions Ans: e, 89. (a) increase Ans: d, 62. (a) near critical temperature of refrigerant The higher temperature in vapour compression cycle occurs at (b) always more than unity (b) Freon-11 (e) none of the above. (a) increases COP (c) solid and dry ice (e) anywhere in the cycle. (c) equal to atmospheric pressure (a) less than 2 kg (c) remains same (c) COP remains unaltered The Following Section consists of Heat Transfer, Refrigeration and Air Conditioning Questions on Physics. (e) unpredictable. (c) will remain unaffected Mass flow ratio of NH3 in comparison to Freon-12 for same refrigeration load and same temperature limits is of the order of (c) equally. (d) 6 The refrigerant used is Ans: e, 4. The lower horizontal line of the refrigeration cycle plotted on pressure-enthalpy-diagram represents Moisture in freon refrigeration system causes Ans: d, 69. (d) more for small capacity and less for high capacity Accumulators should have adequate volume to store refrigerant charge at least (d) smelling Ans: d, 31. (c) sublimation temperature In a vapor compression cycle, the refrigerant immediately after expansion valve is Ans: c, 17. (d) temperature, pressure, and specil volume (d) smaller/bigger depending on capacity (c) enthalpy increase in compressor Ans: d, 22. (a) heat of compression The value of COP in vapour compression cycle is usually (b) specific volume and enthalpy Refrigeration and Air Conditioning Interview Questions and Answers pdf:-46. Refrigeration and Air conditioner interview questions for utility Operator and engineer. Ans: c, 85. (c) is immaterial Ans: d, 79. (d) higher critical temperature (d) anything Ans: c, 53. (b) direct (c) COP remains unaltered (b) axial (b) 1.2 (b) 0.5 to 0.8 h.p. (a) after passing through the condenser HVAC Technician Interview Questions 1. Ans: a, 18. (d) all of the above (b) lithium bromide plant can’t operate below 0°C (d) may be higher or lower depending upon the nature of non-condensable gases (e) Hydrocarbon refrigerant. 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 (e) none of the above. Ans: a, 47. (c) superheat the vapour (b) 25% The evolution of heat of solution takes place in ammonia absorption plant when (d) near critical pressure For proper refrigeration in a cabinet, if the temperature and vapour pressure difference between cabinet and atmosphere is high, then (a) same Ans: e, 9. (e) weak solution in liquid heat exchanger gives up heat to the strong solution. (e) dry vapour. In vapour compression cycle the condition of refrigerant is superheated vapour (b) more Ans: c, 87. Explanation are given for understanding. (b) increases power required per ton of refrigeration (e) 33.3°C. (c) after passing through the expansion or throttle valve (b) vapour absorption (c) after passing through the expansion or thiottle valve (e) unperdictable. Ans: a, 49. (e) before entering the compressor. Mechanical Engineering Multiple choice Questions and Answers. Ans: b, 66. (c) 50% Ans: a, 86. (e) none of the above. Ans: b, 74. Which of the following cycles uses air as the refrigerant (e) none of the above. (c) in 24 hours A certain refrigerating system has a normal operating suction pressure of 10 kg/cm gauge and condensing pressure of about 67 kg/cm. Ans: c, 26. Ans: a 47. (e) heat transfer. (a) 0.1 to 0.5 h.p. These short solved questions or quizzes are provided by Gkseries. (d) corrosion of whole system (c) may increase or decrease depending on the type of refrigerant used (e) unpredictable. (e) Brayton cycle. (c) Freon-22 (e) the refrigeration effect to produce 1 ton of ice in 1 hour time. Ans: b, 63. (b) much below critical pressure (d) constant entropy lines (e) unpredictable. (a) compressor In S.J. (c) 5 (c) evaporator In actual air-conditioning applications for R-12 and R-22, and operating at a condenser temperature of 40 C and an evaporator temperature of 5 C, the heat rejection factor … Critical temperature is’ the temperature above which On the pressure-enthalpy diagram, condensation and desuperheating is represented by a horizontal line because the process (d) reversed Rankine cycle (c) All solar thermally operated absorption systems are capable only of intermittent operation Ans: a, 19. (e) expansion valve Where does the lowest temperature occur in a vapour compression cycle ? (a) actual COP/fheoretical COP If the evaporator temperature of a plant is lowered, keeping the condenser temperature constant, the h.p. (c) 1 to 2 h.p. (b) above which liquid becomes gas In vapor compression cycle, the condition of refrigerant is high pressure saturated liquid Vertical lines on pressure-enthalpy chart show constant (c) water will evaporate (c) 9 : 1 (d) concentration of solution coming out of lithium bromide generator is more in comparison to that entering the generator (e) before entering the compressor.. (d) more/less depending on size of plant (b) Carbon dioxide Ans: a, 25. (a) Ericsson (d) 75% (b) evaporator (b) before passing through the condenser The leaks in a refrigeration system using Freon are detected by Choose the wrong statement The bank of tubes at the back of domestic refrigerator are (b) manually operated valve Ans: a, 84. Ans: b, 2. The answer to this question will demonstrate the candidate's technical ability. Ans: e, 15. (a) 210 kJ/min Ans: d, 83. 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