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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
The domestic refrigerator uses following type of compressor

Centrifugal
Axial
Piston type reciprocating
Miniature sealed unit

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Refrigeration and Air Conditioning
The sensible heat factor during the heating and humidification process is given by (where h₁ = Enthalpy of air entering the heating coil, h₂ = Enthalpy of air leaving the heating coil, and hA = Enthalpy of air at the end of humidification process)

(h1 - h2)/ (hA - h2)
(h2 - hA)/ (h1 - h2)
(hA - h2)/ (h1 - h2)
(hA - h1)/ (h2 - h1)

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Refrigeration and Air Conditioning
Aqua ammonia is used as refrigerant in the following type of refrigeration system

Direct
Indirect
Absorption
Compression

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Refrigeration and Air Conditioning
Which of the following is not a desirable property of a refrigerant?

High risibility with oil
Low boiling point
Large latent heat
Good electrical conductor

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Refrigeration and Air Conditioning
The material of pipe lines for a system using Freon as a refrigerant should be

Brass
Aluminium
Copper
Steel

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Refrigeration and Air Conditioning
During heating and dehumidification process, dry bulb temperature

Decreases
Remains constant
Increases
None of these

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MORE MCQ ON Refrigeration and Air Conditioning

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