How does it work?
Refrigeration and air conditioning is used to cool products or a building environment.
The refrigeration or air conditioning system (R) transfers heat from a cooler low-energy reservoir to a warmer high-energy reservoir
There are several heat transfer loops in a refrigeration system as shown in Figure 2. Thermal energy moves from left to right as it is extracted from the space and expelled into the outdoors through five loops of heat transfer:
Indoor air loop. In the left loop, indoor air is dr ....etc

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169/2016
Maximum : 100 marks
Time : 1 hour and 15 minutes

1. One tonne of refrigeration is equal to :
(A) 21 KJ/min
(B) 420 KJ/min
(C ) 210 KJ/min
(D) 620 KJ/min

2. A water cooler is uses the refrigerant:
(A)R 22
(B)R 21
(C )R 717
(D) R134.

3. What is the angle of point of centre punch?
(A) 90°
(B) 60°
(C ) 45°
(D) 30°

4. The switch should control the line : 
(A) Earth (C ) Neutral
(B) Phase (D) Common

5.A compressor coupled to a motor externally is called : 
(A) Sealed compressor
(B) ....etc

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169/2016
Maximum : 100 marks
Time : 1 hour and 15 minutes

1. One tonne of refrigeration is equal to :
(A) 21 KJ/min
(B) 420 KJ/min
(C ) 210 KJ/min
(D) 620 KJ/min

2. A water cooler is uses the refrigerant:
(A)R 22
(B)R 21
(C )R 717
(D) R134.
3. What is the angle of point of centre punch?
(A) 90°
(B) 60°
(C ) 45°
(D) 30°

4. The switch should control the line : 
(A) Earth (C ) Neutral
(B) Phase (D) Common

5.A compressor coupled to a motor externally is called : 
(A) Sealed compressor
(B) Op ....etc

[:=Read Full Message Here=:]