Heat Transfer Prandtl and Reynolds analogy are same, when Prandtl number is > 2 1.5 1 0.5 > 2 1.5 1 0.5 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Overall heat transfer co-efficient for cooling of hydrocarbons by water is about 50 -100 BTU/hr. ft.2°F 50 -100 Kcal/hr.m².°C 1000 - 1500 BTU/hr. ft.2°F 50 -100 W/m² . °K 50 -100 BTU/hr. ft.2°F 50 -100 Kcal/hr.m².°C 1000 - 1500 BTU/hr. ft.2°F 50 -100 W/m² . °K ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer For a cold dilute feed to produce thick viscous liquor, backward feeding as compared to forward feeding results in Lower capacity Decreased economy Increased economy No effect on economy Lower capacity Decreased economy Increased economy No effect on economy ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Steady state one dimensional heat flow by conduction as given by Fourier's low does not assume that Constant temperature gradient exists Boundary surfaces are isothermal There is no internal heat generation Material is anisotropic Constant temperature gradient exists Boundary surfaces are isothermal There is no internal heat generation Material is anisotropic ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The ratio of total radiating power to the absorptivity of the body depends upon the __________ as per Kirchoffs law. Wavelength of radiation Temperature of the body Nature of the body None of these Wavelength of radiation Temperature of the body Nature of the body None of these ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Heat exchangers operating, when the asymptotic range is reached, Provide very large heat transfer co-efficient Results in making part of the heating surface inactive Results in abruptly increased velocity None of these Provide very large heat transfer co-efficient Results in making part of the heating surface inactive Results in abruptly increased velocity None of these ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS