Heat Transfer The film co-efficient is decreased due to the presence of non-condensing gases in the vapors. The film co-efficient of superheated vapor as compared to that of saturated vapor is Either more or less ; depends on the nature of vapor Some More Less Either more or less ; depends on the nature of vapor Some More Less ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Dropwise condensation of steam on cooling surface is promoted None of these Only in presence of air When both the steam and the tube are clean An oily surface None of these Only in presence of air When both the steam and the tube are clean An oily surface ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In a co-current double pipe heat exchanger used for condensing saturated steam over the inner tube, if the entrance and exit conditions of the coolant are interchanged, then the rate of condensation will Increase Remain unchanged Decrease Either increase or decrease; depends on the coolant flow rate Increase Remain unchanged Decrease Either increase or decrease; depends on the coolant flow rate ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Indirect contact heat exchangers are preferred over direct contact heat exchangers, because Cost of equipment is lower There is no mist formation There is no risk of contamination Heat transfer co-efficient are high Cost of equipment is lower There is no mist formation There is no risk of contamination Heat transfer co-efficient are high ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer At what value of Prandtl number, conduction is negligible in the turbulent core of a fluid flowing through a heated pipe? < 0.5 > 0.6 0.5 < 0.1 < 0.5 > 0.6 0.5 < 0.1 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Minimum recommended baffle spacing in a shell and tube heat exchanger is about (where, D = shell diameter) 0.2 D 0.3 D 0.4 D 0.5 D 0.2 D 0.3 D 0.4 D 0.5 D ANSWER DOWNLOAD EXAMIANS APP
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