Q.1
How is the cascade system achieved?
  • a) VCR system in a parallel combination
  • b) VCR system in a series combination
  • c) VAR system in a series combination
  • d) VAR system in a parallel combination
Q.2
Dense air Bell-Coleman refrigerator is preferred over open cycle air refrigerator.
  • a) False
  • b) True
Q.3
In which of the following Capillary tube is used in as an expansion device?
  • a) Room air conditioners
  • b) Water coolers
  • c) Domestic refrigerators
  • d) All of the mentioned
Q.4
Which of the following uses natural convection air-cooled condensers?
  • a) High capacity room air conditioners
  • b) Industrial air conditioners
  • c) Domestic refrigerators
  • d) High capacity water coolers
Q.5
Which of the following is the material of tubes used for shell and tube condenser in ammonia refrigeration system?
  • a) Copper
  • b) Steel
  • c) Brass
  • d) Aluminum
Q.6
Which of the following represents sensible cooling on the psychrometric chart?
  • a) Inclined line
  • b) Curve
  • c) Horizontal line
  • d) Vertical line
Q.7
Which of the following is the major equipment in the simplest form is used to do saturation of air?
  • a) Pipe
  • b) Chamber
  • c) Vessel
  • d) Insulated Chamber
Q.8
Why is the evaporator used?
  • a) To absorb heat
  • b) To decrease the refrigeration effect
  • c) To reject heat
  • d) To improve C.O.P.
Q.9
Which of the following refrigerants is having the lowest C.O.P for refrigeration system working under the temperature limits of -15°C and 30°C as evaporator and condenser temperature respectively?
  • a) R – 12
  • b) Carbon dioxide
  • c) Ammonia
  • d) R – 30
Q.10
Which of the following type of refrigerants take a direct part in the refrigeration system?
  • a) Primary
  • b) Secondary
  • c) Tertiary
  • d) Mixed
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