Heat Transfer Which of the following is the most controlling factor for the rate of bubble detachment from the hot solid surface? Hot surface temperature Liquid density Liquid viscosity Interfacial tension Hot surface temperature Liquid density Liquid viscosity Interfacial tension ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Asymptotic conditions is reached, when for a fluid flowing in laminar flow through a long tube Exit-fluid temperature > wall temperature Graetz number > 100 Exit fluid temperature < wall temperature Exit fluid temperature = wall temperature Exit-fluid temperature > wall temperature Graetz number > 100 Exit fluid temperature < wall temperature Exit fluid temperature = wall temperature ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The main purpose of providing fins on heat transfer surface is to increase the Temperature gradient Heat transfer area Mechanical strength of the equipment Heat transfer co-efficient Temperature gradient Heat transfer area Mechanical strength of the equipment Heat transfer co-efficient ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The overall heat transfer co-efficient for a shell and tube heat exchanger for clean surfaces is U0 = 400 W/m².K. The fouling factor after one year of operation is found to be hd0 = 2000 W/m².K. The overall heat transfer co-efficient at this time is 894W/m².K 1200W/m².K 333W/m².K 287 W/m².K 894W/m².K 1200W/m².K 333W/m².K 287 W/m².K ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Indirect contact heat exchangers are preferred over direct contact heat exchangers, because There is no risk of contamination Heat transfer co-efficient are high There is no mist formation Cost of equipment is lower There is no risk of contamination Heat transfer co-efficient are high There is no mist formation Cost of equipment is lower ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Which of the following is unimportant in forced convection ? Prandtl number Grashhoff number none of the listed here Reynolds number Prandtl number Grashhoff number none of the listed here Reynolds number ANSWER DOWNLOAD EXAMIANS APP
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