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MCQs

Total Questions : 1342 | Page 5 of 135 pages
Question 41. The power per tonne of refrigeration is
  1.    3.5/C.O.P.
  2.    C.O.P/3.5
  3.    3.5 × C.O.P.
  4.    None of these
 Discuss Question
Answer: Option A. -> 3.5/C.O.P.
Question 42. An important characteristic of absorption system of refrigeration is
  1.    noisy operation
  2.    quiet operation
  3.    cooling below 0°C
  4.    very little power consumption
 Discuss Question
Answer: Option B. -> quiet operation
Question 43. Chaperon equation is a relation between
  1.    Temperature, pressure and enthalpy
  2.    Specific volume and enthalpy
  3.    Temperature and enthalpy
  4.    Temperature, pressure, specific volume and enthalpy
 Discuss Question
Answer: Option D. -> Temperature, pressure, specific volume and enthalpy
Question 44. The evaporator used in household refrigerators is
  1.    Frosting evaporator
  2.    Non-frosting evaporator
  3.    Defrosting evaporator
  4.    None of these
 Discuss Question
Answer: Option A. -> Frosting evaporator
Question 45. In vapour compression cycle, the condition of refrigerant is saturated liquid
  1.    After passing through the condenser
  2.    Before passing through the condenser
  3.    After passing through the expansion throttle valve
  4.    Before entering the expansion valve
 Discuss Question
Answer: Option A. -> After passing through the condenser
Question 46. If the evaporator temperature of a plant is lowered, keeping the condenser temperature constant, the h.p. of compressor required will be
  1.    Same
  2.    More
  3.    Less
  4.    More/less depending on rating
 Discuss Question
Answer: Option B. -> More
Question 47. In a vapour compression system, the condition of refrigerant is dry saturated vapour
  1.    Before entering the compressor
  2.    After leaving the compressor
  3.    Before entering the condenser
  4.    After leaving the condenser
 Discuss Question
Answer: Option A. -> Before entering the compressor
Question 48. In vapour compression cycle the condition off refrigerant is dry saturated vapour
  1.    After passing through the condenser
  2.    Before passing through the condenser
  3.    After passing through the expansion or throttle valve
  4.    Before entering the compressor
 Discuss Question
Answer: Option D. -> Before entering the compressor
Question 49. The refrigerant used in small tonnage commercial machines (hermetically sealed units) is
  1.    Ammonia
  2.    Carbon dioxide
  3.    Sulphur dioxide
  4.    R-12
 Discuss Question
Answer: Option C. -> Sulphur dioxide
Question 50. The refrigeration effect in a dry evaporator compared to flooded evaporator in a similar plant is
  1.    Same
  2.    More
  3.    Less
  4.    More or less depending on ambient conditions
 Discuss Question
Answer: Option C. -> Less

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