Heat Transfer Which of the following has the lowest Prandtl number? Water Molten sodium (a coolant used in fast breeder reactor) Dilute H₂SO₄ Transformer oil Water Molten sodium (a coolant used in fast breeder reactor) Dilute H₂SO₄ Transformer oil ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The non-dimensional temperature gradient in a liquid at the wall of a pipe is the Heat flux Nusselt number Schmidt number Prandtl number Heat flux Nusselt number Schmidt number Prandtl number ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The absorptivity of a grey body at a given temperature __________ with increasing wavelength of radiation. Remains constant Decreases May increase or decrease ; depends on the material Increases Remains constant Decreases May increase or decrease ; depends on the material Increases ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Which of the following has the minimum thermal conductivity? Nitrogen Carbon black Steel Tar Nitrogen Carbon black Steel Tar ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer An insulator should have A porous structure Low thermal conductivity Less resistance to heat flow High thermal conductivity A porous structure Low thermal conductivity Less resistance to heat flow High thermal conductivity ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Steam condensate is recovered by steam traps and recycled for use as boiler feed water, because of its low Hardness Suspended solids content Dissolved soilds content All of these Hardness Suspended solids content Dissolved soilds content All of these ANSWER DOWNLOAD EXAMIANS APP
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