Heat Transfer At constant temperature, the thermal conductivities of gases __________ with rise in pressure. Decrease Remain unchanged Increase May increase or decrease; depends on the pressure Decrease Remain unchanged Increase May increase or decrease; depends on the pressure ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Kg of liquid evaporated per hour in an evaporator is defined as its Capacity Steam load None of these Economy Capacity Steam load None of these Economy ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The ratio of momentum diffusivity to thermal diffusivity is the __________ number. Grashoff Nusselt Stanton Prandtl Grashoff Nusselt Stanton Prandtl ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Low thermal conductivity of heat insulating materials is due to its High proportion of air space None of these Dense structure High specific heat High proportion of air space None of these Dense structure High specific heat ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Nusselt number is the ratio of the Heat flux at the wall to that across the entire pipe None of these Temperature difference to the temperature gradient at the wall Temperature gradient of the wall to that across the entire pipe Heat flux at the wall to that across the entire pipe None of these Temperature difference to the temperature gradient at the wall Temperature gradient of the wall to that across the entire pipe ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Which of the following is generally considered as opaque surface towards radiations? Both solids & liquids Solids Liquids Gases Both solids & liquids Solids Liquids Gases ANSWER DOWNLOAD EXAMIANS APP
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