Q9. Moisture should be removed from refrigerants to avoid. b) high pressure ratio with dry compression gives high compressor discharge temperature So, COP R = Q C over W ref. Hey Readers on the off chance that you are searching for the free download Thermal Engineering R S Khurmi And J K Gupta Book Pdf then you each the ideal spot.Today group ebooksfree4u.com share with you Thermal Engineering R S Khurmi And J K Gupta Book Pdf.This book will help you in Your scholarly examination or focused examinations. Explanation: Here p1 is the evaporator pressure and p2 is the condenser pressure. In this example, compressor 1 empties into the compressor suction в„– 2. Of low charge of refrigerant in the system. 3.Both the condenser and evaporator are heat exchangers with refrigerant as a common medium. A standard ice point temperature corresponds to the temperature of (a) water at 0°C (b) ice … In a vapour compression system, the lowest temperature during the cycles occurs after, 5. Refrigeration and Air Conditioning Multiple Choice Questions :-1. Under the MYCOM brand, Mayekawa’s compressors are used worldwide in industrial refrigeration and freezing, heat pumps, and gas markets. Refrigeration and Air Conditioning MCQ Questions 1-One ton of refrigeration is equal to (A) 21 KJ/min (B) 105 KJ/min (C) 210 KJ/min (D) 420 KJ/min 2-A low side float valve maintains the level of refrigerant in (A) Flooded evaporator (B) Evaporator (C) Condenser (D) Compressor 3-When wet bulb and dry bulb … Wet vapour. Q17. Our compressors leverage thermal technology developed through years of experience to consistently provide high quality. 2. c) both of the mentioned Which of the following statement is true for a condenser? This arrangement provides the means for cooling of fluid between stages, and thus compression work is reduced. Explanation: These are a group of halogenated hydrocarbons. Several methods are available for the detection of leaks. b) it regulates the flow of refrigerant to evaporator When the exhaust pressure is higher than 2.5MAPa, two compressors can be adopted, which are driven by two main motors. Discuss the use of flash tank for intercooling only (Section 12.6) At the end of the lesson, the student should be able to: 1. a) 1 + C + C(p2/p1)^(1/n) However, in such system no subcooling of the liquid for delivery purposes is provided. Mechanical Engineering MCQ Question Papers: DRDO, ISRO, Interview . A – 3- stage compound compression system merely adds another stage, and another intercooler, to a 2- stage compound system. Only liquid is then passed to evaporator and the vapors will be passed to the compressor directly. 3. Next we use the 1st Law to eliminate Wref from the equation. This paper. Desirable Properties of an ideal Refrigerant. 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. Improves volumetric efficiency for the given pressure ratio B. 6. For entropy s = 0.95 the enthalpy h = 276.45 kJ /kg, Large latent heat of vaporisation and low operating pressures, Small latent heat of vaporisation and high operating pressures, Large latent heat of vaporisation and large operating pressures, Small latent heat of vaporisation and low operating pressures. You can find other Vapour Compression Systems, Refrigerants - MCQ Test 2 extra questions, 2. d) none of the mentioned This is because, Latent heat of ammonia is higher than that of freon, Thermal conductivity of water is higher than that of air, Specific heat of water is higher than that of air. Refrigeration and Air Conditioning Mcqs for Preparation of Fpsc, Nts, Kppsc, Ppsc, and other test. Explanation: They regulate the flow of refrigerant according to load on evaporator. a) p1*p2 Only liquid is then passed to evaporator and the vapors will be passed to the compressor directly. Heating, ventilation, and air conditioning (HVAC) is the technology of indoor and vehicular environmental comfort. 1. Vapour Compression Refrigeration System: Analysis of simple vapour compression Refrigeration cycle by p-h and T-S diagram. 2. Learn Refrigeration And Air Conditioning MCQ questions & answers are available for a Mechanical Engineering students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. 7. Mechanical refrigeration, is the utilization of mechanical components arranged in a "refrigeration system" for the purpose of transferring heat. 85. Theory of Machines. d) all of the mentioned Whereas icentropic expansion is also called Adiabatic expansion. Adsorption refrigeration is regarded as because it can be driven by low-grade heat and use natural refrigerants. d) all of the mentioned Which expansion device is capable of regulating the flow of refrigerant according to the load on the evaporator? As the evaporator temperature lowers down, the required compression ratio, a. becomes lower for a given condensation temperature, b. becomes higher for a given condensation temperature, c. becomes steady for a given condensation temperature, ANSWER: b. becomes higher for a given condensation temperature. Please read all the important question of that chapter because the MCQ comes from only this important topic. MCQ … b) larger units This arrangement is adopted for very high compression ratio to avoid difficulties occurred in single stage compressor. Name the essential parts of … Air-Conditioning and Refrigeration. Freon 12 is a compound consisting of stoms of: A. 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