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 = 0.8hL Ha = hL Ha = 2hL Ha= 5hL Ha = 0.8hL Ha = hL Ha = 2hL Ha= 5hL ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In case of heat transfer by conduction in a hollow cylinder, __________ mean area is used to calculate the heat transfer rate. Arithmetic Geometric Either A, B or C Logarithmic Arithmetic Geometric Either A, B or C Logarithmic ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Which of the following has the lowest Prandtl number? Water Dilute H₂SO₄ Transformer oil Molten sodium (a coolant used in fast breeder reactor) Water Dilute H₂SO₄ Transformer oil Molten sodium (a coolant used in fast breeder reactor) ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer With increase in porosity, the thermal conductivity of a solid substance May increase or decrease; depends on the solid Remains unchanged Decreases Increases May increase or decrease; depends on the solid Remains unchanged Decreases Increases ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Dropwise condensation occurs on __________ surfaces polished contaminated cooling smooth clean clean and dirt free polished contaminated cooling smooth clean clean and dirt free ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In sub-cooled boiling, Bubbles from heating surface are absorbed by the mass of the liquid Temperature of the heating surface is less than the boiling point of the liquid Temperature of the heating surface is more than the boiling point of the liquid Very large vapour space is necessary Bubbles from heating surface are absorbed by the mass of the liquid Temperature of the heating surface is less than the boiling point of the liquid Temperature of the heating surface is more than the boiling point of the liquid Very large vapour space is necessary ANSWER DOWNLOAD EXAMIANS APP
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