Heat Transfer Radiator of an automobile engine is a __________ type of heat exchanger. Direct contact Counter-current Co-current Cross-current Direct contact Counter-current Co-current Cross-current ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In thermal radiation for a black body (where, ε is emissivity and α is absorptivity) α = 1; ε ≠ 1 α ≠ 1, ε = 1 α = 1; ε = 1 α ≠ 1, ε ≠ 1 α = 1; ε ≠ 1 α ≠ 1, ε = 1 α = 1; ε = 1 α ≠ 1, ε ≠ 1 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Dropwise condensation of steam on cooling surface is promoted An oily surface None of these Only in presence of air When both the steam and the tube are clean An oily surface None of these Only in presence of air When both the steam and the tube are clean ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer For what value of Prandtl number, the Col-burn analogy is valid ? 0.6 to 120 1 to 103 l to 50 0.06 to 120 0.6 to 120 1 to 103 l to 50 0.06 to 120 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Which of the following is generally considered as opaque surface towards radiations? Gases Both solids & liquids Solids Liquids Gases Both solids & liquids Solids Liquids ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Viscosity of gases __________ with increase in temperature. Increase slowly Increase very rapidly Decrease slowly Remain unaffected Increase slowly Increase very rapidly Decrease slowly Remain unaffected ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS