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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
Carbon dioxide is

Non-flammable
Colourless
Odourless
All of the listed here

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Refrigeration and Air Conditioning
The thermostatic expansion valve is used in ________ type of evaporators.

Dry
DX coil
None of these
Flooded

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Refrigeration and Air Conditioning
In vapour compression cycle, the condition of refrigerant is very wet vapour

Before entering the compressor
After passing through the expansion or throttle valve
Before passing through the condenser
After passing through the condenser

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Refrigeration and Air Conditioning
The lowest temperature during the cycle in a vapour compression system occurs after

Evaporation
Expansion
Compression
Condensation

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

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Refrigeration and Air Conditioning
The wet bulb temperature during sensible cooling of air

None of these
Decreases
Remains constant
Increases

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