Q. In a backward feed multiple effect evaporator

View solution

Q. The Grashoff number is defined as the ratio of the

View solution

Q. According to Reynolds analogy, Stanton number is equal to (where, f = Fanning friction factor)

View solution

Q. The absorptivity of a body is equal to its emissivity

View solution

Q. Absorptivity and refletivity of a perfect black body are respectively

View solution

Q. In thermal radiation for a black body (where, ε is emissivity and α is absorptivity)

View solution

Q. Viscous & heat sensitive liquids are concentrated in __________ evaporators.

View solution

Q. 1 BTU/hr.ft.°F is equal to __________ kcal/hr. m.°C.

View solution

Q. Heat transfer by radiation between two bodies at T1 & T2 and in an ambient temperature of Ta°C depends on

View solution

Q. The ratio of momentum diffusivity to thermal diffusivity is the __________ number.

View solution

Q. For a perfectly transparent surface (like gases), the

View solution

Q. Water is normally used as a coolant in the heat exchange equipments mainly because of its

View solution

Q. The rate of emission of radiation by a body does not depend upon the

View solution

Q. Which of the following has maximum thermal conductivity at the same temperature?

View solution

Q. Maximum heat transfer rate is obtained in __________ flow.

View solution

Q. In case of __________ boiling, the liquid temperature is below the saturation temperature and the boiling takes place in the vicinity of the heated surface.

View solution

Q. The ratio of velocity head to tube side return loss in case of a multipass shell and tube heat exchanger is

View solution

Q. Terminal point temperature differences between fluids in case of a heat exchanger is termed as

View solution

Q. LMTD can't be used as such without a correction factor for the

View solution

Q. Fqra cold viscous feed, backward feed gives __________ than forward feed.

View solution