Heat Transfer Critical value of the __________ number governs the transition from laminar to turbulent flow in free convection heat transfer. Prandtl & Grashoff Reynolds Grashoff Both A & B Prandtl & Grashoff Reynolds Grashoff Both A & B ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In a heat exchanger with steam outside the tubes, a liquid gets heated to 45°C, when its flow velocity in the tubes is 2 m/s. If the flow velocity is reduced to 1 m/s, other things remaining the same, the temperature of the exit liquid will be More than 45°C Less than 45°C Equal to 45°C Initially decreases and remains constant thereafter More than 45°C Less than 45°C Equal to 45°C Initially decreases and remains constant thereafter ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Which of the following is not used as a medium for high temperature heating ? mercury None of the listed here liquid metal dowtherm mercury None of the listed here liquid metal dowtherm ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Low thermal conductivity of heat insulating materials is due to its Dense structure High specific heat None of these High proportion of air space Dense structure High specific heat None of these High proportion of air space ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Overall heat transfer co-efficient for cooling of hydrocarbons by water is about 50 -100 Kcal/hr.m².°C 50 -100 W/m² . °K 1000 - 1500 BTU/hr. ft.2°F 50 -100 BTU/hr. ft.2°F 50 -100 Kcal/hr.m².°C 50 -100 W/m² . °K 1000 - 1500 BTU/hr. ft.2°F 50 -100 BTU/hr. ft.2°F ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In SI units, thermal conductivity is expressed in Watt/m.°K Watt/m4. °K Watt/m². °K Watt/m². °K Watt/m.°K Watt/m4. °K Watt/m². °K Watt/m². °K ANSWER DOWNLOAD EXAMIANS APP
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