Heat Transfer In the free convection regime of pool boiling, the heat flux is proportional to Δt Δt2 Δt1/2 Δt5/4 Δt Δt2 Δt1/2 Δt5/4 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 Equal to 45°C Less than 45°C Initially decreases and remains constant thereafter More than 45°C Equal to 45°C Less than 45°C Initially decreases and remains constant thereafter More than 45°C ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Economy of a multiple effect evaporator is not influenced much by the boiling point elevations temperature of the feed rate of heat transfer ratio of the weight of the thin liquor to thick liquor boiling point elevations temperature of the feed rate of heat transfer ratio of the weight of the thin liquor to thick liquor ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The absorptivity of a grey body at a given temperature __________ with increasing wavelength of radiation. Increases Decreases May increase or decrease ; depends on the material Remains constant Increases Decreases May increase or decrease ; depends on the material Remains constant ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A steel sphere of radius 0.1 m at 400°K is immersed in an oil at 300°K. If the centre of the sphere reaches 350°K in 20 minutes, how long will it take for a 0.05 m radius steel sphere to reach the same temperature (at the centre) under identical conditions ? Assume that the conductive heat transfer co-efficient is infinitely large. 10 minutes 20 minutes 5 minutes 40 minutes 10 minutes 20 minutes 5 minutes 40 minutes ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The average heat transfer co-efficient over the entire length of the plate (ha) and the local heat transfer co-efficient (hL), in case of heat transfer over a flat plate in lminar zone is related as Ha= 5hL Ha = hL Ha = 0.8hL Ha = 2hL Ha= 5hL Ha = hL Ha = 0.8hL Ha = 2hL ANSWER DOWNLOAD EXAMIANS APP
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