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Refrigeration and Air Conditioning

Refrigeration and Air Conditioning
For evaporators and condensers, for the given conditions, the logarithmic mean temperature difference (tm) for parallel flow is ________ that for counter flow.

None of these
Equal to
Less than
Greater than

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Refrigeration and Air Conditioning
The undesirable property of a refrigerant is

Non-explosive
Non-flammable
High boiling point
Non-toxic

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Refrigeration and Air Conditioning
Presence of moisture in a refrigerant affects the working of

Evaporator
Compressor
Condenser
Expansion valve

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

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

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Refrigeration and Air Conditioning
The condensing pressure due to the presence of non-condensable gases, as compared to that actually required for condensing temperatures without non-condensable gases,

Will remain unaffected
Will be higher
May be higher or lower depending upon the nature of non-condensable gases
Will be lower

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Refrigeration and Air Conditioning
The humidification process, on the psychrometric chart is shown by

Inclined line
Vertical line
Horizontal line
Curved line

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