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Engineering
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ME Set-1
Heat Transfer Refrigeration and Air Conditioning
184

Heat Transfer Refrigeration and Air Conditioning MCQ with Answers

184) The value of the wave length for maximum emissive power is given by

Kirchhoff's law

Stefan's law

Wein's law

Planck's law

Answer is:

Wein's law

Heat Transfer Refrigeration and Air Conditioning MCQ with Answers

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Related Heat Transfer Refrigeration and Air Conditioning MCQ with Answers

185) Emissivity of a body will be equal to its absorptivity at all temperatures.

Yes

No

Unknown

None

Answer is:

No

186) R-12 is generally preferred over R-22 in deep freezers since

it has low operating pressures

it gives higher coefficient of performance

it is miscible with oil over large range of temperatures

all of the above

Answer is:

it is miscible with oil over large range of temperatures

187) The temperature of air recorded by a thermometer, when its bulb is surrounded by a wet cloth exposed to the air, is called

wet bulb temperature

dry bulb temperature

dew point temperature

none of these

Answer is:

wet bulb temperature

188) During sub-cooling, sensible heat from a liquid refrigerant is removed.

Yes

No

Unknown

None

Answer is:

Yes

Heat Transfer Refrigeration and Air Conditioning MCQ with Answers

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