| 1. | The atmospheric air at dry bulb temperature of 15°C enters a heating coil maintained at 40°C. The air leaves the heating coil at 25°C. The by-pass factor of the heating coil is ? | |
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0.376
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0.4
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0.6
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0.67
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Report Question| 2. | During humidification process ............. increases ? | |
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wet bulb temperature
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relative humidity
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dry bulb temperature
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specific humidity
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| 3. | The process, generally used in winter air-conditioning to warm and humidity the air, is called ? | |
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humidification
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dehumidification
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heating and humidification
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cooling and dehumidification
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| 4. | In chemical dehumidification process ? | |
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dew point temperature decreases
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wet bulb temperature decreases
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dry bulb temperature increases
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all of these
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| 5. | When the temperature of the surrounding is higher than the temperature of the body, then the heat loss by convection from the body to the surrounding will be ? | |
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positive
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negative
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zero
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none of these
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| 6. | The conditioned air supplied to the room must have the capacity to take up ? | |
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room sensible heat load only
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room latent heat load only
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both room sensible heat and latent heat loads
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none of the above
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| 7. | The horizontal and non-uniformly spaced lines on a psychrometric chart indicates ? | |
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dry bulb temperature
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wet bulb temperature
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dew point temperature
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specific humidity
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| 8. | A mixture of dry air and water vapour, when the air has diffused the maximum amount of water vapour into it, is called ? | |
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dry air
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moist air
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saturated air
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specific bumidity
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| 9. | A thermostatic expansion valve in a refrigeration system ? | |
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ensures the evaporator completely filled with refrigerant of the load
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is suitable only for constant load systems
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maintains different temperatures in evaporator in proportion to load
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none of the above
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| 10. | The evaporator changes the low pressure liquid refrigerant from the expansion valve into ? | |
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high pressure liquid refrigerant
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low pressure liquid and vapour refrigerant
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low pressure vapour refrigerant
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none of these
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