DIRECT EXPANSION AIR CONDITIONING - Practice Mode

1) Which is circulated in VRV system for cooling cycle?

Water Cooled air Cooled brine Liquid refrigerant

Correct Answer: Liquid refrigerant

2) What is the expansion of HVAC?

Heavy Vehicle Air Conditioning Heating, Vibration, Auto Correction Heating, Ventilation Automatic Control Heating, Ventilation and Air Conditioning

Correct Answer: Heating, Ventilation and Air Conditioning

3) Which valve is used for gas charging and pressure checking in central AC plants?

Safety valve Service valve Solenoid valve Non return valve

Correct Answer: Service valve

4) What is the value of absolute vacuum in millimeters of mercury?

-76 -760 -14.7 -10.33

Correct Answer: -760

5) Which compressor is used only in central AC systems?

Scroll Screw Rotary Centrifugal

Correct Answer: Centrifugal

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