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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