NATE Air Distribution Practice Questions with Answers

<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