Heat Transfer Among liquids, water has a comparatively high value of thermal conductivity, due to its High viscosity Partial ionisation Low density Dense structure High viscosity Partial ionisation Low density Dense structure ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A 10 cm dia steam pipe, carrying steam at 180°C, is covered with an insulation (conductivity = 0.6 W/m.°C). It losses heat to the surroundings at 30°C. Assume a heat transfer co-efficient of 0.8 W/m².°C for heat transfer from surface to the surroundings. Neglect wall resistance of the pipe and film resistance of steam. If the insulation thickness is 2 cms, the rate of heat loss from this insulated pipe will be Less than the steam pipe with 5 cms insulation Equal to that of the uninsulated steam pipe Less than that of the uninsulated steam pipe Greater than that for uninsulated steam pipe Less than the steam pipe with 5 cms insulation Equal to that of the uninsulated steam pipe Less than that of the uninsulated steam pipe Greater than that for uninsulated steam pipe ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In SI units, fouling factor is expressed in W/m²°K m²°K/W m²°K m°K/W W/m²°K m²°K/W m²°K m°K/W ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A diathermaneous substance __________ the thermal radiation completely. Reflects Absorbs None of these Transmits Reflects Absorbs None of these Transmits ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The average heat transfer co-efficient for laminar film condensation on vertical surface is inversely proportional to (where, ΔT = Temperature drop across condensate film ) ΔT None of the listed here (ΔT)2 (ΔT)1/4 ΔT None of the listed here (ΔT)2 (ΔT)1/4 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The Fourier number (defined as a.t/L²) is used in the analysis of problem involving heat transfer by Steady state conduction Natural convection Forced convection Transient conduction Steady state conduction Natural convection Forced convection Transient conduction ANSWER DOWNLOAD EXAMIANS APP
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