Mechanical Engineering - Heat Transfer, Refrigeration and Air Conditioning

11. 

The superheated vapour region, in a pressure enthalpy chart, is represented by the space

A. to the left of saturated liquid line
B. to the right of saturated liquid line
C. between the saturated liquid line and saturated vapour line
D. none of the above

Answer: Option C

Explanation:

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12. 

The minimum temperature to which water can be cooled in a cooling tower is

A. dew point temperature of air
B. wet bulb temperature of air
C. dry bulb temperature of air
D. ambient air temperature

Answer: Option B

Explanation:

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13. 

The index which corelates the combined effects of air temperature, relative humidity and air velocity on the human body, is known as

A. mean radiant temperature
B. effective temperature
C. dew point temperature
D. none of these

Answer: Option B

Explanation:

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14. 

The ratio of Nusselt number and the product of Reynold's number and Prandtl number is equal to

A. Stanton number
B. Biot number
C. Peclet number
D. Grashoff number

Answer: Option A

Explanation:

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15. 

The alignment circle is marked on the psychrometric chart at

A. 20°C DBT and 50% RH
B. 26°C DBT and 50% RH
C. 20°C DBT and 60% RH
D. 26°C DBT and 60% RH

Answer: Option B

Explanation:

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