PROCESS EQUIPMENT AND PLANT DESIGN QUIZ

Which of the following is not a graphical method (but is an analytical method) for the calculation of theoretical number of stages in case of continuous binary distillation?

McCabe-Thiele's method

None of these

Sorel-Lewis method

Ponchon-Savarit method

TRUE ANSWER : ?
YOUR ANSWER : ?

In condenser, the cooling water is passed in the tube side in a pass arrangement, because

It makes condenser compact

More thinner tubes can be used

It reduces heat transfer area

Pressure drop is reduced

TRUE ANSWER : ?
YOUR ANSWER : ?

The slope of operating line in the rectifying section of a distillation column is unity, if the reflux ratio is

∞

1

0

Minimum

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__________ shaped roof is most commonly used for cylindrical tanks.

Flat

Umbrella

Dome

Cone

TRUE ANSWER : ?
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Shortest distance between two tubes is

Called tube pitch

None of these

Called tube clearance

More in case of triangular pitch as compared to square pitch of tube layout

TRUE ANSWER : ?
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In the design of a paddle agitator, the ratio (paddle dia/tank dia) is normally taken as

0.8

0.25

0.5

0.1

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__________ heat exchanger is also known as 'hair pin type' exchanger,

Plate type

Regenerative

Double pipe

Finned

TRUE ANSWER : ?
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It is not desirable to design a heat exchanger for LMTD correction factor, FT, of less than

0.95

0.8

0.99

0.55

TRUE ANSWER : ?
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The longitudinal stress induced in a thin walled cylinderical vessel under internal pressure is

pd/4t

pd/t

pd/2t

pd/8t

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Le/D for 90° elbow (medium radius) and 90°square elbow would be respectively around

3 and 5

250 and 600

25 and 60

100 and 250

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