Q. The left face of a one dimensional slab of thickness 0.2 m is maintained at 80°C and the right face is exposed to air at 30°C. The thermal conductivity of the slab is 1.2 W/m.K and the heat transfer co-efficient from the right face is 10 W/m².K. At steady state, the temperature of the right face in °C is

View solution

Q. In a shell and tube heat exchanger, the shell side fluid velocity can not be changed by changing the

View solution

Q. To reduce the tube side pressure drop for the same flow rate, the heat exchanger recomended is

View solution

Q. In a gas-liquid shell and tube heat exchanger, the

View solution

Q. Which is the most suitable for the concentration of foamy & frothy liquors ?

View solution

Q. Boiling point elevation of an ideal solution

View solution

Q. The rate of heat transfer is a product of overall heat transfer co-efficient, the difference in temperature and the

View solution

Q. Which of the following has the lowest overall heat transfer co-efficient ?

View solution

Q. Low thermal conductivity of heat insulating materials is due to its

View solution

Q. The most conducive surface for dropwise condensation to occur is the __________ surface.

View solution

Q. In an interphase heat transfer process, the equilibrium state corresponds to equality of temperature in the two phases, while the condition for equilibrium in an interphase mass transfer process is equality of

View solution

Q. Calburn analogy is applicable for the value of Prandtl number from

View solution

Q. Pick out the correct equation.

View solution

Q. Steam side heat transfer co-efficient in an evaporator is in the range of __________ kcal/hr.m²°C.

View solution

Q. Correction is applied to LMTD for __________ flow.

View solution

Q. If h1 = inner film co-efficient and h2 = outer film co-efficient, then the overall heat transfer co-efficient is

View solution

Q. One kilogram of water at 0°C is changed to superheated steam of one atm pressure and 300° C. The major heat consumption in the process will be to

View solution

Q. The Nusselt number for fully developed (both thermally and hydrodynamically) laminar flow through a circular pipe whose surface temperature remains constant is

View solution

Q. Sensible heat of hot industrial flue gases can not be recovered by a/an

View solution

Q. The critical radius of insulation for a spherical shell is (where, K = thermal conductivity of insulating material h₀ = heat transfer coefficient at the outer surface)

View solution