Q. Steam condensate is recovered by steam traps and recycled for use as boiler feed water, because of its low

View solution

Q. Duhring rule is important in solving problems on

View solution

Q. In a shell and tube heat exchanger, the height of 25 percent cut baffles is equal to (where, D = inside diameter of shell)

View solution

Q. Multiple effect evaporation is generally recommended, when the

View solution

Q. The inside heat transfer co-efficient in case of turbulent flow of liquid in the tube side in a 1-2 shell and tube heat exchanger is increased by __________ times, when the number of tube passes is increased to 8.

View solution

Q. __________ heat exchanger is the most suitable, when the temperature of shell side fluid is much higher than that of tube side.

View solution

Q. The rate of heat transfer from a vertical plate by natural convection depends upon the temperature differences (ΔT) between wall and outside bulk. The proportionality is given as

View solution

Q. If air (a non-condensing gas) is present in a condensing vapor stream, it will __________ the condensation rate of vapor.

View solution

Q. Prandtl and Reynold's analogies are identical for Prandtl number value of

View solution

Q. The outlet temperature of cooling water in a heat exchanger is generally not allowed to exceed above 50°C in industrial practice mainly to avoid

View solution

Q. In evaporators, lowering the feed temperature

View solution

Q. Unsteady state heat conduction occurs, when

View solution

Q. What is the absorptivity of a black body ?

View solution

Q. Mode of heat transfer in which the fluid moves under the influence of changes in fluid pressure produced by external work is called

View solution

Q. Baffle spacing

View solution

Q. Boiling point elevation of a solution of NaOH

View solution

Q. Absorptivity of a perfect black body is unity. Which of the following has maximum absorptivity ?

View solution

Q. At what value of Prandtl number, the hydrodynamic and thermal boundary layers of a fluid flowing over a heated plate will be identical ?

View solution

Q. Fourier's law of heat conduction applies to __________ surfaces.

View solution

Q. __________ chart is known as transient heat conduction chart.

View solution