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Question:
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When the velocity of the air in the duct reduces, the resulting velocity pressure difference gets converted to ______ pressure:
Static
_____ temperature is the actual temperature of the air measured by an ordinary thermometer:
Dry bulb
Face and by-pass dampes in the AHU helps in controlling Relative Humidity:
True
As the head increases, the fan will need ______ horsepower to deliver the required quantity of air against the system head or pressure:
High
When there is an abrupt expansion in the duct, the pressure loss in the duct will be:
Very high
Which of the following ultraviolet air cleaners produces ultraviolet waves?
Mercury vapor lamps
The Entholpy of air is the measure of heat content in _____ of air
Btu per pound
The dew point temperature is the temperature at which moisture begins to condense out of the air.
The minimum separation between grille and ceiling must be _____ :
2 feet
The density of the water vapor is ____
Extremely low
Which of the following laws states that “the total pressure of a gas mixture is the sum of the pressures of each gas in the mixture”?
Dalton’s law
For medium and high pressure ducts, ________ sheets are exclusively used for strength and rigidity to withstand the higher static pressure:
Steel
Heat rejection factor of the plant varies with the:
Both the options are correct
____ temperature is the sensible–heat level of air and is taken with an ordinary thermometer
Dry-bulb
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