PROCESS EQUIPMENT AND PLANT DESIGN QUIZ

Floating head heat exchangers are used for the

Co-current heat transfer systems

Cases where temperature difference between the shell and the tubes is more (>50°C)

Counter-current heat transfer systems

Heat transfer between corrosive fluids

TRUE ANSWER : ?
YOUR ANSWER : ?

Bubble cap plate column is

A finite stage contactor

A continuous contactor

Used only for distillation, not for absorption

A differential stage contactor

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YOUR ANSWER : ?

What is the minimum recommended ligament for square pitch arrangement in case of heat exchangers?

Equal to tube O.D

6.5 mm

Equal to tube I.D

6.5 cms

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In packed towers provided with saddle packing, liquid redistributors are positioned at every __________ times column diameter or 6 metres whichever is less.

20-25

44119

43959

43864

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With increase in pressure drop (for a given particle size), the dust collection efficiency of a cyclone separator will

Increase or decrease depending on the nature of the dust

Increase

Remain unaffected

Decrease

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For a cylinderical internally pressurised vessel, which of the following closure types would withstand highest pressure, if each closure is of the same material and thickness?

Conical

Flat plate

Hemispherical

Ellipsoidal (2 : 1)

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Pick out the wrong statement pertaining to the design of a basket type evaporator.

It is used for high viscosity liquor having large rate of scaling

The tube bundle is suspended on bracket

Downtake is formed by the annular space between the bundle and the shell

There is no central downtake

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In a multipass shell and tube heat exchanger, the shell side cross flow area does not depend upon

Clearance

None of these

Pitch

Baffle spacing

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__________ tray arrangement is recommended for distillation column having diameter upto 4 ft.

Cross flow

Split flow

Radial flow

Cascade

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Pick out the wrong statement pertaining to a shell and tube heat exchanger.

The maximum value of baffle spacing is equal to the I.D. of the shell

The maximum unsupported tube span is generally about 75 times tube diameter, but is reduced to about 60 times for aluminium, copper & alloys of these

The minimum value of baffle spacing is 50 mm

Disk and doughnut baffle is the most commonly used baffle

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