Heat Transfer Which of the following is the most widely used heat insulating material for pipelines carrying steam? Fireclay refractory followed by aluminium sheet 85% magnesia cement and glass wool Cotton followed by aluminium foil Tar dolomite bricks followed by asbestos Fireclay refractory followed by aluminium sheet 85% magnesia cement and glass wool Cotton followed by aluminium foil Tar dolomite bricks followed by asbestos ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Double pipe heat exchangers are used because it occupies less floor area because it is less costly when heat transfer area required is very low when heat transfer area required is very high because it occupies less floor area because it is less costly when heat transfer area required is very low when heat transfer area required is very high ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer With increase in temperature, the total emissivity of conductors Remains same Decreases linearly Decreases Increases Remains same Decreases linearly Decreases Increases ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A body is called grey if the monochromatic emissivity of the body is Unity Zero Different for all wavelengths Same for all wavelengths Unity Zero Different for all wavelengths Same for all wavelengths ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The Nusselt number for fully developed (both thermally and hydrodynamically) laminar flow through a circular pipe, where the wall heat flux is constant, is 4.36 2.36 120.36 Dependent on NRe only 4.36 2.36 120.36 Dependent on NRe only ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Which of the following parameters of the fluid is not very important, while deciding its route in a shell and tube heat exchanger? Corrosiveness & fouling characteristics Pressure Density Viscosity Corrosiveness & fouling characteristics Pressure Density Viscosity ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS