Search
The wall of an oven operating at 1000°C consists of two layers of different material. The inside layer of wall is built of 40cm of kaoline firebrick having k-0.08 W/m-K, surrounded by 40cm of fireclay brick having k-0,8 W/m-K. The outer side of the wall is maintained at Process Heat Transfer 50°C. What is the temperature at the interface of the layers?_____
What are the various dimensionless numbers that characterize the convection heat transfer in laminar flow through tubes?______ (only write the dimensionless numbers)
What are the various dimensionless numbers that characterize the natural convection heat transfer?________ (only write the dimensionless numbers)
For industrial applications, nucleate boiling is undesirable (yes or No)
For the Prandtl (Pr) number greater than unity, the thermal boundary layer is-___(thinner than/thicker than/same as) the hydrodynamic boundary layer?
In case of pool boiling of saturated liquid, the boiling action occurring below the critical temperature drop is called_____?
case of laminar flow heat transfer over a flat plate, The heat transfer coefficient_____ (increases/decreases/remains constant) from the leading edge of plate to the end of the plate?
The average Heat transfer coefficient for drop-wise condensation is______
(greater than/less than/equal to) the average heat transfer coefficient for film type condensation?
Comparing the flow arrangement in a heat exchnager, LMTD in parallel flow is (greater than/less than/equal to) LMTD in counter-flow?
What is the thermal diffusivity (in m³/s) of the material having properties, p-7500 kg/m³, Cp 400 J/(kg-K), k-15 W/(m-K).?
