Q. Which of the following has the highest thermal conductivity ?

View solution

Q. For specified tube outside diameter, higher BWG means higher

View solution

Q. Pick out the wrong statement.

View solution

Q. In case of a vertical tube evaporator, with increase in the liquor level, the __________ is increased.

View solution

Q. Electromagnetic radiations propagate in vacuum with a velocity of __________ metre/second.

View solution

Q. Heat flux is the time rate of heat transfer per unit

View solution

Q. Nusselt number (for forced convection heat transfer) is a function of the __________ number.

View solution

Q. Pick out the wrong statement.

View solution

Q. Which type of heat exchanger is preferred for heavy heat loads ?

View solution

Q. Pick out the wrong statement.

View solution

Q. While the total emissivity of a perfect black body is unity, the same for a real body is

View solution

Q. In a multipass shell and tube heat exchanger, tube side return pressure loss is equal to __________ the velocity head.

View solution

Q. For a given ambient air temperature with increase in the thickness of insulation of a hot cylinderical pipe, the rate of heat loss from the surface would

View solution

Q. In a parallel flow heat exchanger, if the outlet temperature of hot and cold fluids are the same, then the log mean temperature difference (LMTD) is

View solution

Q. For what value of Prandtl number, the Col-burn analogy is valid ?

View solution

Q. In a forward feed multiple effect, the pressure build up will be

View solution

Q. Film boiling occurs at __________ pressure.

View solution

Q. Heat flux through several resistances in series in analogous to the current flowing through several

View solution

Q. Extended heat transfer surface like fins are used to increase the heat transfer rate. Fin efficiency is defined as the ratio of heat transferred across the fin surface to the theoretical heat transfer across an equal area held at the

View solution

Q. Vacuum is generally maintained in the vapour space of an evaporator mainly to

View solution