Heat Transfer Fluid motion in the natural convection heat transfer between a solid surface and a fluid in contact with it, results from the Existence of thermal boundary layer Temperature gradient produced due to density difference Buoyancy of the bubbles produced at active nucleation site None of these Existence of thermal boundary layer Temperature gradient produced due to density difference Buoyancy of the bubbles produced at active nucleation site None of these ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Electro-magnetic spectrum range, which is important for radiation varies from __________ microns. 100 to 1000 10 to 100 0.5 to 50 1 to 100 100 to 1000 10 to 100 0.5 to 50 1 to 100 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Circulation pump is located below the evaporater to Create more suction head Avoid frequent priming None of these Avoid cavitation Create more suction head Avoid frequent priming None of these Avoid cavitation ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The critical radius 'r' of insulation on a pipe is given by r = k/2h r = 2k/h r = k/h r = h/k r = k/2h r = 2k/h r = k/h r = h/k ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Water is normally used as a coolant in the heat exchange equipments mainly because ofits Abundance & high heat capacity Low density Low viscosity High fluidity Abundance & high heat capacity Low density Low viscosity High fluidity ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The energy radiated from a surface Q at absolute temperature T is related as Q ∝ T² Q ∝ T³ Q ∝ T⁴ None of these Q ∝ T² Q ∝ T³ Q ∝ T⁴ None of these ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS