Q121
Open questionWhich of the following statement is correct?
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Mechanical Engineering · all questionsRefrigeration And Air Conditioning
Refrigeration And Air Conditioning
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Q122
Open questionWhich of the following statement is correct?
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Q123
Open questionFor ammonia refrigerating systems, the tubes of a shell and tube condenser are made of
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Q124
Open questionR-12 is generally preferred over R-22 in deep freezers since
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Q125
Open questionA good refrigerant should have
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Q126
Open questionPick up the wrong statement.
A refrigerant should have
A refrigerant should have
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Q127
Open questionFor proper refrigeration in a cabinet, if the temperature and vapour pressure difference between cabinet and atmosphere is high, then
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Q128
Open questionThe ratio of actual mass of water vapour in a given volume of moist air to the mass of water vapour in the same volume of saturated air at the same temperature and pressure, is called
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Q129
Open questionThe 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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Q130
Open questionThe capillary tube, as an expansion device, is used in
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Q131
Open questionThe sensible heat factor during the heating and humidification process is given by (where h1 = Enthalpy of air entering the heating coil, h2 = Enthalpy of air leaving the heating coil and hA = Enthalpy of air at the end of humidification process)
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Q132
Open questionThe sensible heat factor during cooling and dehumidification process is given by (where h1 = Enthalpy of air entering the cooling coil, h2 = Enthalpy of air leaving the cooling coil and hA = Enthalpy of air at the end of dehumidification process)
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Q133
Open questionIn chemical dehumidification process,
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Q134
Open questionThe specific humidity during heating and humidification process.
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Q135
Open questionFor evaporators and condensers, for the given conditions, the logarithmic mean temperature difference (tm) for parallel flow is ________ that for counter flow.
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Q136
Open questionA certain refrigerating system has a normal operating suction pressure of 10 kg/cm gauge and condensing pressure of about 67 kg/cm. The refrigerant used is
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Q137
Open questionReducing suction pressure in refrigeration cycle
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Q138
Open questionThe sub-cooling in a refrigeration cycle
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Q139
Open questionThe superheating in a refrigeration cycle
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Q140
Open questionUnder cooling in a refrigeration cycle
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