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
A thermostatic expansion valve in a refrigeration system

None of these
Maintains different temperatures in evaporator in proportion to load
Ensures the evaporator completely filled with refrigerant of the load
Is suitable only for constant load systems

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