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ME Set-1
Heat Transfer Refrigeration and Air Conditioning
155

Heat Transfer Refrigeration and Air Conditioning MCQ with Answers

155) In chemical dehumidification process,

dew point temperature decreases

wet bulb temperature decreases

dry bulb temperature increases

all of these

Answer is:

all of these

Explanation:

In chemical dehumidification process,
* dew point temperature decreases
* wet bulb temperature decreases
* dry bulb temperature increases

Heat Transfer Refrigeration and Air Conditioning MCQ with Answers

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Related Heat Transfer Refrigeration and Air Conditioning MCQ with Answers

156) A one tonne refrigerating machine means that

one tonne is the total mass of machine

one tonne refrigerant is used

one tonne of water can be converted into ice

one tonne of ice when melts from and at 0 Degree Centigrade in 24 hours, the refrigeration effect is equivalent to 210 kJ/min

Answer is:

one tonne of ice when melts from and at 0 Degree Centigrade in 24 hours, the refrigeration effect is equivalent to 210 kJ/min

157) The air cooling system mostly used in transport type aircrafts is

simple air cooling system

simple evaporative air cooling system

boot-strap air cooling system

all of these

Answer is:

boot-strap air cooling system

158) The critical thickness of insulation is the ratio of thermal conductivity of the insulating material (k) to the heat transfer coefficient at the outer surface of the insulation (h₀).

Right

Wrong

Answer is:

Right

159) In counter-current flow heat exchanger, the logarithmic temperature difference between the fluids is __________ as compared to parallel flow heat exchanger.

same

less

greater

none of these

Answer is:

greater

Heat Transfer Refrigeration and Air Conditioning MCQ with Answers

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155) In chemical dehumidification process,

all of these

Heat Transfer Refrigeration and Air Conditioning MCQ with Answers

Related Heat Transfer Refrigeration and Air Conditioning MCQ with Answers

156) A one tonne refrigerating machine means that

one tonne of ice when melts from and at 0 Degree Centigrade in 24 hours, the refrigeration effect is equivalent to 210 kJ/min

157) The air cooling system mostly used in transport type aircrafts is

boot-strap air cooling system

158) The critical thickness of insulation is the ratio of thermal conductivity of the insulating material (k) to the heat transfer coefficient at the outer surface of the insulation (h0).

Right

159) In counter-current flow heat exchanger, the logarithmic temperature difference between the fluids is __________ as compared to parallel flow heat exchanger.

greater

Heat Transfer Refrigeration and Air Conditioning MCQ with Answers

158) The critical thickness of insulation is the ratio of thermal conductivity of the insulating material (k) to the heat transfer coefficient at the outer surface of the insulation (h₀).