HVAC PLANT - Practice Mode

1) What is the minimum quantity of fresh air needed per person in comfort AC?

3 to 4.5 cfm 4 to 5.5 cfm 5 to 7.5 cfm 2 to 3.5 cfm

Correct Answer: 5 to 7.5 cfm

2) How the reciprocal of air density is mentioned in psychrometric chart?

Specific gravity Specific heat ratio Sensible heat ratio Specific volume per unit mass

Correct Answer: Specific volume per unit mass

3) Which instrument is used to measure the velocity pressure of air in ducting system?

Nanometer Pitot tube Barometer Bourdeon tube

Correct Answer: Pitot tube

4) Which instrument measures the humidity of air?

Barometer Manometer Hygrometer Hydrometer

Correct Answer: Hygrometer

5) Which psychometric process takes place if the air is passed through hygroscopic chemicals?

Sensible heating of air Heating and humidification Heating and cleaning of air Heating and dehumidification

Correct Answer: Heating and dehumidification

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