The vertical and uniformly spaced lines on a psychrometric chart indicates dry b

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Question
The vertical and uniformly spaced lines on a psychrometric chart indicates
Options
A. dry bulb temperature
B. wet bulb temperature
C. dew point temperature
D. specific humidity

Correct Answer

dry bulb temperature

Heat Transfer, Refrigeration and Air Conditioning problems

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1. In a vapour compression system, the condition of refrigerant is dry saturated vapour
Options
A. before entering the compressor
B. after leaving the compressor
C. before entering the condenser
D. after leaving the condenser

2. A reversible engine has ideal thermal efficiency of 30%. When it is used as a refrigerating machine with all other conditions unchanged, the coefficient of performance will be
Options
A. 1.33
B. 2.33
C. 3.33
D. 4.33

4. In order to collect liquid refrigerant and to prevent it from going to a __________ , a device known as accumulator is used at the suction of compressor.
Options
A. compressor
B. condenser
C. expansion valve
D. evaporator

5. The amount of heat flow through a body by conduction is
Options
A. directly proportional to the surface area of the body
B. directly proportional to the temperature difference on the two faces of the body
C. inversely proportional to the thickness of the body
D. all of the above

6. A furnace is made of a red brick wall of thickness 0.5 m and conductivity 0.7 W/mK. For the same heat loss and temperature drop, this can be replaced by a layer of diatomite earth of conductivity 0.14 W/mK and thickness
Options
A. 0.5 m
B. 0.1 m
C. 0.2 m
D. 0.5 m

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