Heat Transfer Value of Prandtl number for water ranges from L to 2 5 to 10 100 to 500 1000 to 2000 L to 2 5 to 10 100 to 500 1000 to 2000 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Among liquids, water has a comparatively high value of thermal conductivity, due to its High viscosity Dense structure Low density Partial ionisation High viscosity Dense structure Low density Partial ionisation ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer All analogy equations connecting friction factor and heat transfer co-efficient apply only to Both A and B Form friction Turbulent flow Wall or skin friction Both A and B Form friction Turbulent flow Wall or skin friction ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer If the baffle spacing in a shell and tube heat exchanger increases, then the Reynolds number of the shell side fluid Remains unchanged Decreases Increases or decreases depending on number of shell passes Increases Remains unchanged Decreases Increases or decreases depending on number of shell passes Increases ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The heat transfer by radiation from a mild steel surface is to be reduced by reducing the emissivity of the surface. This can be best achieved by Roughening the surface Painting the surface white (with aluminium paint) Painting the surface black Giving the surface a mirror finish Roughening the surface Painting the surface white (with aluminium paint) Painting the surface black Giving the surface a mirror finish 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 Cube Equal for all the three Cylinder Sphere Cube Equal for all the three Cylinder Sphere ANSWER DOWNLOAD EXAMIANS APP
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