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Head developed by the pump is directly proportional to the _______ of speed of the pump
_______
Square
Factors affecting the inductance of a coil are:
All the options are correct
For cooling, the Seasonal Energy Efficiency Ratio (SEER) of an air source heat pump ranges from _____:
_____
9 to 16
When two fans are operated in series the cfm is doubled:
False
_______ is also called feed forward control
Open loop control
_______ is the height of the column of warm air that causes the chimney action of the ventilator:
Stack height
At absolute zero temperature, molecules in an object will:
Cease to move
In an electric transformer which of the following quantities are not transformed from primary to secondary windings: (Multiple Answer Question)
Power
Frequency
In a three phase system, each of the phases are separated by _______ electrical degrees with each other:
120
The process in which the oil is changed into tiny droplets for proper combustion is:
Atomization
High Efficiency Particulate Air (HEPA) filters can able to filter the dust particles of the order:
0.3 micron
An air change every _______ complete changes er hour is desirable for bathroom ventilation:
20
Most common material used for adsorption for gas phase filtration is:
Carbon
Radiators adequate air spacing must cover at least _______ of the total surface of the unit:
40%
In Non-Direct Vent installations, combustion air is taken from _____ and flue gases are discharged _____:
indoors, outdoors
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