Heat Transfer Thermal diffusivity of a material Has the unit m² /sec All of these Is defined as K/ρ . Cp Is the ratio of thermal conductivity to thermal capacity Has the unit m² /sec All of these Is defined as K/ρ . Cp Is the ratio of thermal conductivity to thermal capacity ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Fourier's law applies to the heat transfer by None of the listed here conduction radiation convection None of the listed here conduction radiation convection ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Which area is used in case of heat flow by conduction through a cylinder ? Logarithmic mean area Geometric mean area Arithmetic mean area None of the listed here Logarithmic mean area Geometric mean area Arithmetic mean area None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In a forward feed multiple effect evaporator unit No pump is required to withdraw the product from the last effect Transfer from effect to effect is done by pumps None of these Viscosity of liquid is highest in first effect No pump is required to withdraw the product from the last effect Transfer from effect to effect is done by pumps None of these Viscosity of liquid is highest in first effect 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 Sphere Cube Equal for all the three Cylinder Sphere Cube Equal for all the three Cylinder ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In the equation Q = UAΔt; Δt is Geometric mean temperature difference Arithmetic mean temperature difference Logarithmic mean temperature difference The difference of average bulk temperatures of hot and cold fluids Geometric mean temperature difference Arithmetic mean temperature difference Logarithmic mean temperature difference The difference of average bulk temperatures of hot and cold fluids ANSWER DOWNLOAD EXAMIANS APP
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