Heat Transfer The Fourier number (defined as a.t/L²) is used in the analysis of problem involving heat transfer by Steady state conduction Transient conduction Forced convection Natural convection Steady state conduction Transient conduction Forced convection Natural convection ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The Sieder-Tate correlation for heat transfer in turbulent flow in pipe gives Nu α Re0.8, where, Nu is the Nusselt number and Re is the Reynolds number for the flow. Assuming that this relation is valid, the heat transfer co-efficient varies with the pipe diameter (D) as (D)1.8 (D)0.2 (D)-0.2 (D)-1.8 (D)1.8 (D)0.2 (D)-0.2 (D)-1.8 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer An ejector is used to None of these Increase pressure Increase temperature Remove condensate None of these Increase pressure Increase temperature Remove condensate ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Mode of heat transfer in which the fluid moves under the influence of changes in fluid pressure produced by external work is called Conduction Natural convection Radiation Forced convection Conduction Natural convection Radiation Forced convection ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Three solid objects of the same material and of equal mass-a sphere, a cylinder (length = diameter) and a cube are at 500°C initially. These are dropped in a quenching bath containing a large volume of cooling oil each attaining the bath temperature eventually. The time required for 90% change in temperature is the smallest for Cylinder Cube Equal for all the three Sphere Cylinder Cube Equal for all the three Sphere ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer With increase in temperature, the thermal conductivity of a gas Remains same Increases May increase or decrease depending on the type of gas Decreases Remains same Increases May increase or decrease depending on the type of gas Decreases ANSWER DOWNLOAD EXAMIANS APP
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