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Total Questions : 1342 | Page 132 of 135 pages
Question 1311. The temperature of ammonia after compression in a vapour compression system is
  1.    50 to 70°C
  2.    None of these
  3.    20 to 50°C
  4.    70 to 110°C
 Discuss Question
Answer: Option D. -> 70 to 110°C
Question 1312. In a lithium bromide absorption refrigeration system
  1.    None of these
  2.    Ammonia is used as a refrigerant and lithium bromide as an absorbent
  3.    Lithium bromide is used as a refrigerant and water as an absorbent
  4.    Water is used as a refrigerant and lithium bromide as an absorbent
 Discuss Question
Answer: Option D. -> Water is used as a refrigerant and lithium bromide as an absorbent
Question 1313. A refrigerant compressor is used to
  1.    All of these
  2.    Raise the pressure of the refrigerant
  3.    Circulate the refrigerant through the refrigerating system
  4.    Raise the temperature of the refrigerant
 Discuss Question
Answer: Option A. -> All of these
Question 1314. A vapour absorption refrigeration system
  1.    Cools below 0°C
  2.    Requires little power consumption
  3.    Gives quiet operation
  4.    Gives noisy operation
 Discuss Question
Answer: Option C. -> Gives quiet operation
Question 1315. A thermostatic expansion valve in a refrigeration system
  1.    Ensures the evaporator completely filled with refrigerant of the load
  2.    Maintains different temperatures in evaporator in proportion to load
  3.    Is suitable only for constant load systems
  4.    None of these
 Discuss Question
Answer: Option A. -> Ensures the evaporator completely filled with refrigerant of the load
Question 1316. The alignment circle is marked on the psychrometric chart at
  1.    20°C DBT and 50% RH
  2.    26°C DBT and 50% RH
  3.    26°C DBT and 60% RH
  4.    20°C DBT and 60% RH
 Discuss Question
Answer: Option B. -> 26°C DBT and 50% RH
Question 1317. Efficiency of a Carnot engine is given as 80%. If the cycle direction be reversed, what will be the value of C.O.P. of reversed Carnot Cycle?
  1.    0.8
  2.    0.25
  3.    1.25
  4.    0.5
 Discuss Question
Answer: Option B. -> 0.25
Question 1318. In aircraft, air refrigeration Cycle is used because of
  1.    Low temperature at high altitudes
  2.    Low weight per tonne of refrigeration
  3.    Higher coefficient of performance
  4.    High heat transfer rate
 Discuss Question
Answer: Option B. -> Low weight per tonne of refrigeration
Question 1319. The capacity of a domestic refrigerator is in the range of
  1.    1 to 3 TR
  2.    5 to 7 TR
  3.    3 to 5 TR
  4.    0.1 to 0.3 TR
 Discuss Question
Answer: Option D. -> 0.1 to 0.3 TR
Question 1320. Allowable pressure on high pressure side or ammonia absorption system is of the order of
  1.    Atmospheric pressure
  2.    56 bars
  3.    Slightly above atmospheric pressure
  4.    24 bars
 Discuss Question
Answer: Option B. -> 56 bars

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