Heat Transfer Indirect contact heat exchangers are preferred over direct contact heat exchangers, because There is no risk of contamination Cost of equipment is lower There is no mist formation Heat transfer co-efficient are high There is no risk of contamination Cost of equipment is lower There is no mist formation Heat transfer co-efficient are high ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Nucleate boiling is promoted In the absence of agitation None of these On polished surfaces On rough surfaces In the absence of agitation None of these On polished surfaces On rough surfaces ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Value of Prandtl number for water ranges from L to 2 100 to 500 5 to 10 1000 to 2000 L to 2 100 to 500 5 to 10 1000 to 2000 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Which of the following is the most controlling factor for the rate of bubble detachment from the hot solid surface? Liquid viscosity Interfacial tension Liquid density Hot surface temperature Liquid viscosity Interfacial tension Liquid density Hot surface temperature ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Fouling factor Does not provide a safety factor for design None of these Accounts for additional resistances to heat flow Is a dimensionless quantity Does not provide a safety factor for design None of these Accounts for additional resistances to heat flow Is a dimensionless quantity ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Heat transfer rate described by Fourier's law will decrease, if the __________ increases. Temperature difference Thickness Thermal conductivity Heat transfer area Temperature difference Thickness Thermal conductivity Heat transfer area ANSWER DOWNLOAD EXAMIANS APP
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