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6 Cards in this Set
- Front
- Back
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Which of the following instruments use a battery operated fan to draw air over the thermometer bulbs? 1) Hydrometer 2) Sling psychrometer 3) Dry psychrometer 4) Aspirating psychrometer 5) Potentiometer |
Aspirating psychrometer |
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The term "relative humidity" applies to the: 1) Amount of humidity in the air 2) Amount of moisture in the air 3) Dryness fraction of the air 4) Percentage of moisture in the air as compared to the amount of moisture the air can hold at a specific temperature 5) Weight of moisture in the air |
Percentage of moisture in the air as compared to the amount of moisture the air can hold at a specific temperature |
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Dalton's Law of partial pressure states that: 1) For every pressure there is an equal and opposite pressure 2) In a mixture of two or more gases each will exert a partial pressure that is equal to the pressure that it would exert if it filled that space alone 3) Water vapour must be included when calculating air pressures 4) The sum of the mass of air and water vapour in a vessel is equal to the total pressure 5) The pressure exerted by two or more gases on the walls of the containing vessel is equal to a constant |
In a mixture of two or more gases each will exert a partial pressure that is equal to the pressure that it would exert if it filled that space alone |
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Which law describes the existence of moisture in the air in vapour or evaporated state? 1) 2nd Law of Thermodynamics 2) Dalton's Law of Partial Pressures 3) Newton's laws of gravity 4) Boyle's Ideal Gas Law 5) 1st Law of Thermodynamics |
Dalton's Law of Partial Pressures |
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Relative humidity is: 1) The maximum mass of moisture that a specific amount of air can contain 2) The actual mass of moisture present in a specific amount of air 3) The ratio of the mass of moisture contained in a specific amount of air to the maximum amount of moisture this specific amount of air can contain 4) The ratio of the mass of air contained in a specific amount of moisture to the maximum amount of air this specific amount of moisture can contain 5) A specific amount of air saturated with moisture |
The ratio of the mass of moisture contained in a specific amount of air to the maximum amount of moisture this specific amount of air can contain |
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A device for measuring relative humidity is called: 1) A psychrometer 2) A chronometer 3) An aspirating gauge 4) An R.H. gauge 5) A dew point tester |
A psychrometer |
