Heat Transfer All analogy equations connecting friction factor and heat transfer co-efficient apply only to Form friction Both A and B Wall or skin friction Turbulent flow Form friction Both A and B Wall or skin friction Turbulent flow ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Overall heat transfer co-efficient for cooling of hydrocarbons by water is about 1000 - 1500 BTU/hr. ft.2°F 50 -100 Kcal/hr.m².°C 50 -100 BTU/hr. ft.2°F 50 -100 W/m² . °K 1000 - 1500 BTU/hr. ft.2°F 50 -100 Kcal/hr.m².°C 50 -100 BTU/hr. ft.2°F 50 -100 W/m² . °K ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A composite wall consists of two plates A and B placed in series normal to the flow of heat. The thermal conductivities are kA and kB and the specific heat capacities are CPA and CPB for plates A and B respectively. Plate B has twice the thickness of plate A. At steady state, the temperature difference across plate A is greater than that across plate B, when KA>2 kB CPA > CPB CPA < CPB KA < 0.5kB KA>2 kB CPA > CPB CPA < CPB KA < 0.5kB ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In case of parallel flow heat exchanger, the lowest temperature theoretically attainable by the hot fluid is __________ the outlet temperature of the cold fluid. More than Less than Equal to Either more or less than (depending upon the fluid) More than Less than Equal to Either more or less than (depending upon the fluid) ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The wavelength at which the maximum monochromatic emissive power occurs for a black body, is (where, T = absolute temperature of the black body) α T⁴ αT α 1/T Independent of T α T⁴ αT α 1/T Independent of T ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In which mode of heat transfer, the Biot number is important? Transient heat conduction Radiation Forced convection Natural convection Transient heat conduction Radiation Forced convection Natural convection ANSWER DOWNLOAD EXAMIANS APP
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