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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Carbon dioxide is

Colourless
Odourless
All of the listed here
Non-flammable

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Refrigeration and Air Conditioning
Moisture in Freon refrigeration system causes

Freezing automatic regulating valve
Ineffective refrigeration
Corrosion of whole system
High power consumption

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Refrigeration and Air Conditioning
The superheated vapour region, in a pressure enthalpy chart, is represented by the space

To the left of saturated liquid line
None of these
Between the saturated liquid line and saturated vapour line
To the right of saturated liquid line

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Refrigeration and Air Conditioning
Nusselt number (NN) is given by

NN = V²/t.cp
NN = ρ V l /μ
NN = μ cp/k
NN = hl/k

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Refrigeration and Air Conditioning
In a spray washing system, if the temperature of water is higher than the dry bulb temperature of entering air, then the air is

Heated and dehumidified
Heated and humidified
Cooled and dehumidified
Cooled and humidified

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Refrigeration and Air Conditioning
The specific humidity during dehumidification process

None of these
Increases
Remains constant
Decreases

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MORE MCQ ON Refrigeration and Air Conditioning

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