| 1. | The minimum temperature to which water can be cooled in a cooling tower is ? | |
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dew point temperature of air
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wet bulb temperature of air
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dry bulb temperature of air
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ambient air temperature
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Report Question| 2. | The evaporator used in house-hold refrigerators is ? | |
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frosting evaporator
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non-frosting evaporator
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defrosting evaporator
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none of these
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| 3. | The capillary tube is not used in large capacity refrigeration systems because ? | |
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cost is too high
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capacity control is not possible
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it is made of copper
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required pressure drop can not be achieved
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| 4. | A valve which maintains a constant degree of superheat at the end of the evaporator called ? | |
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automatic expansion valve
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high side float valve
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thermostatic expansion valve
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low side float valve
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| 5. | If a gas is to be liquified, its temperature must be ? | |
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increased to a value above its critical temperature
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reduced to a value below its critical temperature
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equal to critical temperature
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none of the above
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| 6. | The critical temperature is the temperature ? | |
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below which a gas does not obey gas law
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above which a gas may explode
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below which a gas is always liquified
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above which a gas will never liquified
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| 7. | The critical pressure of a liquid is the pressure ? | |
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above which a liquid will remain a liquid
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above which a liquid will explode
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above which a liquid will always convert into a vapour
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below which a liquid will always be in vapour form
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| 8. | The ratio of the actual mass of water vapour in a unit mass of dry air to the mass of water vapour in the same mass of dry air when it is saturated at the same temperature and pressure, is called ? | |
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humidity ratio
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relative humidity
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absolute humidity
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degree of saturation
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| 9. | Dry bulb temperature is the temperature of air recorded by a thermometer, when ? | |
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it is not affected by the moisture present in the air
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its bulb is surrounded by a wet cloth exposed to the air
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the moisture present in it begins to condense
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none of the above
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