Heat Transfer Which of the following is not used as a medium for high temperature heating ? None of the listed here liquid metal dowtherm mercury None of the listed here liquid metal dowtherm mercury ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In a shell and tube heat exchanger, putting a longitudinal baffle across the shell, forces the shell side fluid to pass __________ through the heat exchanger. Once Thrice Twice Four times Once Thrice Twice Four times 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 Sphere Equal for all the three Cube Cylinder Sphere Equal for all the three Cube ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Which of the following has maximum thermal conductivity? Coal Nitrogen Tar Iron Coal Nitrogen Tar Iron ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Extended heat transfer surface like fins are used to increase the heat transfer rate. Fin efficiency is defined as the ratio of heat transferred across the fin surface to the theoretical heat transfer across an equal area held at the Temperature of the fin end Constant temperature equal to that of the base Average temperature of the fin Surrounding temperature Temperature of the fin end Constant temperature equal to that of the base Average temperature of the fin Surrounding temperature ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer (Cp . μ)/K is termed as the __________ number. Stanton Nusselt Grashoff Prandtl Stanton Nusselt Grashoff Prandtl ANSWER DOWNLOAD EXAMIANS APP
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