Q. In the downcomer of a distillation column, the minimum recommended residence time is about __________ seconds.

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Q. In a multipass shell and tube heat exchanger, the baffles on shell side is primarily provided for

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Q. For turbine agitator, the impeller diameter is about

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Q. If a single tube pass heat exchanger is converted to two passes; for the same flow rate, the pressure drop per unit length in tube side will __________ times.

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Q. __________ of water makes it a widely used coolant in heat exchangers.

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Q. The equivalent diameter for fluid flow through a channel of constant non-circular cross section of area 'A' is given by (where, P = perimeter of the channel in contact with the fluid)

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Q. Fouling factor must be included in the calculation of over all design heat transfer coefficient, when the liquid

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Q. Lug support is meant for supporting __________ vessels.

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Q. Overall mass transfer co-efficient in case of absorption of __________ in water is based on the gas film co-efficient only, as the mass transfer process is gas film (phase) controlling.

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Q. Most of the storage vessels/tanks are made cylindrical, because of the fact that a cylinder

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Q. The distance between the top of the slots and the liquid surface when the static liquid is just ready to flow over the overflow weir is called

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Q. Liquid gradient over the tray results due to the

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Q. The centre to centre distance between two consecutive baffles in a shell and tube heat exchanger is called the baffle pitch or baffle spacing, which is more than 1/5th the I.D. of the shell. Which of the following is not a function of the baffles ?

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Q. Bubble cap plate column is

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Q. In seive plate column, holes are drilled or punched in sizes ranging from 2.5 to 12 mm (5 mm being widely used). The hole pitch is normally __________ times the hole diameter to give the required hole area.

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Q. Pick out the wrong statement.

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Q. The force due to wind load acting on a tall vessel depends upon its

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Q. Bubble cap diameter used for the distillation column having diameter ranging from 1.5 to 4.5 metres is about __________ mm.

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Q. Power required for agitation depends upon the

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Q. Tube height in a calendria type evaporator is normally less than __________ metres.

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