HVAC PLANT - Quiz

1) What is the velocity pressure of air in a duct if the total pressure and static pressure are known?

Sum of static and total pressures Sum of dynamic and total pressures Difference in static and total pressures Difference in dynamic and total pressures

2) What is the volume of air passed at the outlet of a rectangular duct whose area of cross section is 1m² and the air velocity by an anemometer is 10m/min?|

5 m³ 10 m³ 15 m³ 20 m³

3) How the power consumed by the motor varies with its speed in VFD?

Cube of its speed Square of its speed No change with speed Inversely proportional to its speed

4) Which parameter of power supply determines the speed of induction motor?

Volt Current Volume Frequency

5) Which type of load consumes more energy in an AC plant system?

Air ventilation Air distribution Water circulation Heating and cooling