Q. In a co-current double pipe heat exchanger used for condensing saturated steam over the inner tube, if the entrance and exit conditions of the coolant are interchanged, then the rate of condensation will

View solution

Q. Which of the following situations can be approximated to a steady state heat transfer system ?

View solution

Q. Sensible heat absorbed by 1 lb of water when it is heated from 32 to 212°F may be around __________ BTU.

View solution

Q. In a heat exchanger, the rate of heat transfer from the hot fluid to the cold fluid

View solution

Q. With increase in temperature, the total emissivity of conductors

View solution

Q. Loss of heat from untagged steam pipe to the ambient air is by

View solution

Q. Fruit juice (a heat sensitive material) can be concentrated in a __________ evaporator.

View solution

Q. Tubes are held between top and bottom tube sheets in Calenderia type evaporator by keeping

View solution

Q. Nusselt number is the ratio of the temperature gradient at the wall to

View solution

Q. The Stefan-Boltzman constant depends on the

View solution

Q. The units of resistance to heat transfer is

View solution

Q. Thermal conductivity of a gas at low density, __________ with increase in temperature.

View solution

Q. Nusselt number is a function of Prandtl number and __________ number of fluid in natural convection heat transfer.

View solution

Q. __________ heat exchanger is used for chilling oil to be dewaxed.

View solution

Q. It is not recommended to use a 1-2 shell and tube heat exchanger for a particular heat duty, whenever the LMTD correction factor is

View solution

Q. Pick out the wrong statement.

View solution

Q. In sub-cooled boiling,

View solution

Q. With increase in temperature, the thermal conductivity of a gas

View solution

Q. Which of the following parameters of the fluid is not very important, while deciding its route in a shell and tube heat exchanger?

View solution

Q. Corrosiveness of steam condensate is due to the presence of

View solution