Multiple Choice Questions (MCQ) with answers on Refrigeration and Air conditioning

Multiple Choice Questions (MCQ) with answers on Refrigeration and Air conditioning

1-During which component of vapour compression refrigeration system, the enthalpy remains constant:

(A) Evaporator

(B) Compressor

(C) Throttle valve

(D) None

 

2-Which one of the following is a CFC refrigerant?

(A) R 744

(B) R 290

(C) R 502

(D) R 718

 

3-In sensible cooling process the relative humidity:

(A) decreases

(B) increases

(C) remains constant

(D) none of the above

 

4-In psychrometric chart, dew point temperature lines are

(A) horizontal

(B) vertical

(C) curved

(D) straight lines slopping downwards to the right

 

5-In psychrometric chart, specific humidity lines are:

(A) vertical

(B) horizontal

(C) inclined

(D) curved lines

 

6-Commonly used refrigerant in commercial ice plant is

(A) CO2

(B) Freon 12

(C) Ammonia

(D) Air

 

7-Accumulator is provided for

(A) Storing of liquid refrigerant

(B) exchange of heat

(C) storing of unvaporized liquid

(D) condensing gas

 

8-Oil separator if fitted in between

(A) Condenser and evaporator

(B) On the suction line

(C) compressor and condenser

(D) at the receiver outlet

 

9-An air washer can work as:

(A) Humidifier

(B) Dehumidifier

(C) Filter

(D) All of the above

 

10-Sling psychrometer is used to measure

(A) only dry bulb temperature

(B) only wet bulb temperature

(C) dry and wet bulb temperature

(D) relative humidity

 

ANSWERS:

1-(C), 2-(C), 3-(B), 4-(A), 5-(B), 6-(C), 7-(A), 8-(C), 9-(D), 10-(C)