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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
If a heat pump cycle operates between the condenser temperature of +27°C and evaporator temperature of -23°C, then the Carnot COP will be

5
6
0.2
1.2

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Refrigeration and Air Conditioning
The specific humidity during heating and humidification process.

Increases
Remains constant
None of these
Decreases

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

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Refrigeration and Air Conditioning
For large tonnage (more than 200 TR) air-conditioning applications, the compressor recommended is

Rotating
Reciprocating
Screw
Centrifugal

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

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

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Refrigeration and Air Conditioning
Cooling water is required for following equipment in ammonia absorption plant

Evaporator
Absorber
Condenser
Condenser, absorber and separator (rectifier)

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