Q121
Open questionVacuum is generally maintained in the vapour space of an evaporator mainly to
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Heat Transfer
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Q122
Open questionPrandtl and Reynold's analogies are identical for Prandtl number value of
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Q123
Open questionIn case of vertical tube evaporator, with increase in liquor level, the overall heat transfer co-efficient
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Q124
Open questionDietus-Boelter equation cannot be used for molten metals mainly due to its very low
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Q125
Open questionA hollow sphere and a solid sphere of the same material and equal radii are heated to the same temperature. In this case,
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Q126
Open questionPick out the wrong statement.
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Q127
Open questionAn ejector is used to
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Q128
Open questionAn insulator should have
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Q129
Open questionShell side pressure drop in a shell and tube heat exchanger does not depend upon the
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Q130
Open questionFor large heat transfer area requirement, shell and tube heat exchanger is preferred, because it
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Q131
Open questionIn a heat exchanger, one transfer unit means
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Q132
Open questionWhen does the heat generated by fluid friction becomes appreciable compared to the heat transferred between the fluids?
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Q133
Open question__________ chart is known as transient heat conduction chart.
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Q134
Open questionIt is not preferable to use superheated steam in evaporators, because of its very
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Q135
Open questionVent pipes are provided in a condenser to
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Q136
Open questionElectro-magnetic spectrum range, which is important for radiation varies from __________ microns.
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Q137
Open questionWhich of the following has the lowest Prandtl number?
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Q138
Open questionWhich has the lowest Prandtl number?
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Q139
Open questionThe absorptivity of a grey body at a given temperature __________ with increasing wavelength of radiation.
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Q140
Open questionFor a given ambient air temperature with increase in the thickness of insulation of a hot cylinderical pipe, the rate of heat loss from the surface would
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