Process Equipment And Plant Design MCQ Questions & Answers

21

The ends of a cylinderical vessel can be closed by a head, which can be one of the four shapes. For the same thickness, choose the one which can withstand the highest pressure.

A) Flat plate B) Hemispherical C) Torispherical D) Ellipsoidal

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Answer & Solution

Answer: Option D

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22

The ratio of volumes of the mixed reactor to the plug flow reactor (for identical feed composition, flow rate, conversion, and for all positive reaction orders) is always

A) 1 B) < 1 C) >1 D) Equal to the order of reaction

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Answer & Solution

Answer: Option C

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23

With increase in gas flow rate to fabric surface area ratio (Nm³/hr/m² fabric surface area), the size & the cost of a bag filter

A) Increases B) Decreases C) Remain unaffected D) None of these

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Answer & Solution

Answer: Option B

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24

Pick out the wrong statement pertaining to the comparative evaluation of performance of the packed tower and the plate tower.

A) Plate tower is perferred, if interstage cooling is required to remove heats of reaction or solution B) Plate tower is preferred over packed tower, if the operation involves liquids containing dispersed solids C) The total weight of a dry plate tower is usually much more than that of a dry packed tower designed for the same duty D) In operations involving large temperature changes. (e.g. distillation), plate towers are preferred over packed towers as the packing may be crushed due to large temperature changes

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Answer & Solution

Answer: Option C

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25

Pick out the wrong statement.

A) Rivetting provides a permanent fastening method B) The joint made by overlapping of one plate over the other, and then rivetting the two plates together with two rows of rivets is called 'double rivetted butt joint' C) Shank diameter of the rivets should be less than the size of the hole drilled in the plate for rivetting D) The efficiency of a rivetted joint is the ratio of the strength of the rivetted joint to the strength of the solid plate

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Answer & Solution

Answer: Option B

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26

25% cut segmental baffle means that the baffle

A) Height is 75% of the I.D. of the shell B) Height is 25% of the I.D. of the shell C) Spacing is 75% of its height D) Width is 25% of its height

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Answer & Solution

Answer: Option A

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27

Vertical vessels are not supported by

A) Brackets B) Skirts C) Columns D) Saddles

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Answer & Solution

Answer: Option D

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28

Weep holes provided in the plates of a distillation column

A) Facilitate draining out liquid from a tray when the unit is not in operation B) Are normally located near the overflow weir so that any delivery of liquid during operation follows approximately the same path as the overflow fluid C) Must be large enough (usually $${\frac{1}{4}^{''}}$$ to $${\frac{5}{8}^{''}}$$ dia) to prevent plugging but should not deliver excessive amount of fluid during operation D) All of the above

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Answer & Solution

Answer: Option D

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29

Mc Cable Thiele method used for finding theoretical stages in a distillation column assumes that the

A) Sensible heat differences are small, because the temperature changes from tray to tray is small B) Trouton's rule is applicable C) Liquid/vapor loading across the column remains constant D) All of the above

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Answer & Solution

Answer: Option D

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30

A shell may by termed as thin if its thickness to diameter ratio is less than 0.1. The factor which can be neglected in the calculation of membrane stresses is

A) Bending B) Deformation C) Shear D) Elongation

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Answer & Solution

Answer: Option A

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Process Equipment And Plant Design MCQ Questions & Answers | Chemical Engineering