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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
An Electrolux refrigerator is called a ___ absorption system.

None of the listed here
Two fluids
Single fluid
Three fluids

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Refrigeration and Air Conditioning
Air refrigeration operates on

Carnot cycle
Rankine’s cycle
Brayton cycle
Reversed Carnot cycle

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Refrigeration and Air Conditioning
In a vapour compression system, the condition of refrigerant before passing through the condenser is

Saturated liquid
Superheated vapour
Wet vapour
Dry saturated vapour

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Refrigeration and Air Conditioning
The formation of frost on cooling coils in a refrigerator

Increases power consumption
Improves C.O.P. of the system
Increases heat transfer
Reduces power consumption

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Refrigeration and Air Conditioning
In a psychrometric chart, specific humidity (moisture content) lines are

Horizontal and non-uniformly spaced
Curved lines
Vertical and uniformly spaced
Horizontal and uniformly spaced

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Refrigeration and Air Conditioning
The comfort conditions in air conditioning are at (where DBT = Dry bulb temperature, and RH = Relative humidity)

20°C DBT and 80% RH
25°C DBT and 40% RH
25°C DBT and 100% RH
22°C DBT and 60% RH

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