Heat Transfer Dropwise condensation is promoted on a/an __________ surface. Coated Glazed Oily Smooth Coated Glazed Oily Smooth ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Which has the lowest Prandtl number? Water Lube oil Aqueous solution Liquid metal Water Lube oil Aqueous solution Liquid metal 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 Equal to that of the uninsulated steam pipe Greater than that for uninsulated steam pipe Less than the steam pipe with 5 cms insulation Less than that of the uninsulated steam pipe Equal to that of the uninsulated steam pipe Greater than that for uninsulated steam pipe Less than the steam pipe with 5 cms insulation Less than that of the uninsulated steam pipe ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Air is to be heated by condensing steam. Two heat exchangers are available (i) a shell and tube heat exchanger and (ii) a finned tube heat exchanger. Tube side heat transfer area are equal in both the cases. The recommended arrangement is Shell and tube heat exchanger with air on shell side and steam inside tubes Finned tube heat exchanger with air outside and steam inside Shell and tube heat exchanger with air inside tubes and steam on shell side Finned tube heat exchanger with air inside and steam outside Shell and tube heat exchanger with air on shell side and steam inside tubes Finned tube heat exchanger with air outside and steam inside Shell and tube heat exchanger with air inside tubes and steam on shell side Finned tube heat exchanger with air inside and steam outside ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer As per Kirchoffs law, the ratio of the total radiating power to the absorptivity of a body depends on the none of the listed here temperature of the body only wavelength of monochromatic radiation nature of material of body none of the listed here temperature of the body only wavelength of monochromatic radiation nature of material of body ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer For a given ambient air temperature with increase in the thickness of insulation of a hot cylinderical pipe, the rate of heat loss from the surface would First decrease and then increase Increase Decrease First increase and then decrease First decrease and then increase Increase Decrease First increase and then decrease ANSWER DOWNLOAD EXAMIANS APP
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