NATE AIR DISTRIBUTION QUESTIONS WITH CORRECT ANSWERS RATED A+

question: The density of air is A: How much air weighs per cubic foot B: How much volume one pound of air occupies C: The ratio of the weight of water to that of the same volume of water D: The ratio of the amount of water vapor contained in a cu. Ft. Of air to the amount of moisture held at saturation - A: How much air weighs per cubic foot The specific volume of air is A: How much air weighs per cubic foot B: How much volume one pound of air occupies C: The ratio of the weight of water to that of the same volume of water D: The ratio of the amount of water vapor contained in a cu. Ft. Of air to the amount of moisture held at saturation - B: How much volume one pound of air occupies The relative humidity of air is A: The percent of moisture air is holding as opposed to the amount it could hold if it were saturated B: Always less than 100% C: The most accurate measurement of how much water vapor is in a given body of air D: Used as a multiplier to size humidifiers - A: The percent of moisture air is holding as opposed to the amount it could hold if it were saturated As air is heated it A: Contracts B: Expands C: Does not change its volume D: Becomes more dense - B: Expands The air pressure in a sealed balloon is A: Static pressure B: Velocity pressure C: A combination of static and velocity pressures D: None of the above - A: Static pressure A blower connected to a length of duct A: Creates static pressure which is then converted to velocity pressure B: Creates velocity pressure directly C: Creates resistance to the flow of air D: None of the above - A: Creates static pressure which is then converted to velocity pressure Velocity pressure is determined by A: Subtracting static pressure from total pressure B: Subtracting total pressure from static pressure C: Dividing the total pressure by the static pressure D: Subtracting the traverse pressure from the velocity - A: Subtracting static pressure from total pressure Velocity pressure can be mathematically converted to A: CFM B: FPM C: Relative humidity D: Inches of mercury vacuum - B: FPM Fpm = 4005 x (sqrt of Vp) An inclined manometer is basically A: A U-tube manometer tilted at a steep angle B: A hygrometer on a stand C: A digital micron gauge D: A type of sling psychrometer - A: A U-tube manometer tilted at a steep angle A duct measures 24 inches by 18 inches. The air velocity is 600 FPM. How many CFM are being delivered through the duct? Round the number to the nearest whole number A: 1600 CFM B: 1800 CFM C: 2000 CFM D: 2200 CFM - B: 1800 CFM