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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
One tonne of refrigeration (1TR) means that the heat removing capacity is

21 kJ/min
210 kJ/min
620 kJ/min
420 kJ/min

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

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

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Refrigeration and Air Conditioning
Pick up the wrong statement. A refrigerant should have

Higher critical temperature
Tow specific heat of liquid
High boiling point
High latent heat of vaporisation

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Refrigeration and Air Conditioning
The leaks in a refrigeration system using Freon are detected by

Halide torch which on detection produces greenish flame lighting
Using reagents
Sulphur sticks which on detection gives white smoke
Smelling

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Refrigeration and Air Conditioning
In a vapour compression system, the condition of refrigerant before entering the expansion or throttle valve is

High pressure saturated liquid
Dry vapour
Wet vapour
Very wet vapour

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Refrigeration and Air Conditioning
Vertical lines on pressure-enthalpy chart show constant

Total heat lines
Pressure lines
Entropy lines
Temperature lines

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MORE MCQ ON Refrigeration and Air Conditioning

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