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When the velocity of the air in the duct reduces, the resulting velocity pressure difference gets converted to ______ pressure:
Which of the following is true1.The comfort chart is an empirically determined effective temperature index2.The comfort charts are published by ASHRAE
Statement (1) and (2) are correct
_____ temperature is the actual temperature of the air measured by an ordinary thermometer:
Face and by-pass dampes in the AHU helps in controlling Relative Humidity:
As the head increases, the fan will need ______ horsepower to deliver the required quantity of air against the system head or pressure:
When there is an abrupt expansion in the duct, the pressure loss in the duct will be:
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 _____ :
The density of the water vapor is ____
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”?
For medium and high pressure ducts, ________ sheets are exclusively used for strength and rigidity to withstand the higher static pressure:
____ temperature is the sensible–heat level of air and is taken with an ordinary thermometer