Q. Multiple effect evaporators are commonly used in the manufacture of

P. Paper
Q. Superphosphate
R. Sugar
S. Fats

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

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

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Q. Pick out the wrong statement.

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

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

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

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

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Q. Pick out the wrong statement.

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

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Q. Pick out the wrong statement.

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

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

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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

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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

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

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

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Q. Film boiling occurs at __________ pressure.

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

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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

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