Process Equipment and Plant Design MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Process Equipment and Plant Design, a fundamental topic in the field of Basic Chemical Engineering. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Process Equipment and Plant Design MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Process Equipment and Plant Design mcq questions that explore various aspects of Process Equipment and Plant Design problems. Each MCQ is crafted to challenge your understanding of Process Equipment and Plant Design principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Basic Chemical Engineering tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Process Equipment and Plant Design MCQs are your pathway to success in mastering this essential Basic Chemical Engineering topic.

Note: Each of the following question comes with multiple answer choices. Select the most appropriate option and test your understanding of Process Equipment and Plant Design. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

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Process Equipment and Plant Design MCQs | Page 8 of 50

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Q71.
Compensation against openings in process vessels for giving inlet and outlet connections, for providing sight glasses and manholes etc. is provided for strength and rigidity. The most efficient type of compensation is of __________ type.

a.

nozzle or rim

b.

flared out

c.

fluid in

d.

ring plate

Discuss
Answer: (a).nozzle or rim
Q72.
In case of a continuous distillation column, increase in reflux ratio may result in the

a.

lower fixed charges for the column.

b.

greater cost for the reboiler heat supply.

c.

greater cost for the condenser coolant.

d.

all (a), (b) and (c).

Discuss
Answer: (d).all (a), (b) and (c).
Q73.
In a distillation column, the minimum residence time for liquid in the downspout is about __________ seconds.

a.

1

b.

8

c.

80

d.

180

Discuss
Answer: (b).8
Q74.
Generally, elliptical dished heads

a.

are manufactured on 2:1 ratio of major to minor axis and is recommended to be used for pressure vessels operating above a pressure of 1.5 MN/m² .

b.

resist half the pressure rating compared to hemi spherical head provided on the cylindrical shell of the same thickness and diameter.

c.

are approximately as strong as seamless cylindrical shell having the corresponding I.D and O.D.

d.

all (a), (b) and (c)

Discuss
Answer: (d).all (a), (b) and (c)
Q75.
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.

Discuss
Answer: (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.
Q76.
The circumferential (hoop) stress in a thin walled cylinderical vessel under internal pressure is

a.

pd/2t

b.

pd/4t

c.

pd/t

d.

pd/3t

Discuss
Answer: (a).pd/2t
Q77.
Lₑ/D for fully open gate valves would be

a.

much more than that for fully open globe valves.

b.

much less (say 2% than that for fully open globe valves).

c.

around 7.

d.

both (b) and (c).

Discuss
Answer: (d).both (b) and (c).
Q78.
LMTD correction factor is used in heat exchanger design for

a.

double pipe heat exchanger.

b.

multipass shell and tube heat exchanger.

c.

fouling fluids.

d.

counter flow of hot and cold fluids.

Discuss
Answer: (b).multipass shell and tube heat exchanger.
Q79.
Pick out the wrong statement about the design of a sieve plate column.

a.

An increased weir height improves the tray efficiency at the cost of high plate pressure drop; optimum wear height being 40-90 mm for column pressure above atmospheric and 6-12 mm for vacuum columns.

b.

For segmental downcomers, the chord length is 60-80% of the column diameter. An initial value of downcomer area of 12% is taken in the design.

c.

Width of the calming section provided at the inlet and outlet sides of the plate is 75 mm for column diameter below 1.5 metres and 100 mm for larger diameter columns.

d.

Minimum recommended downcomer residence time for the disengagement of entrained vapour is the same for both foaming and non-foaming liquids, which is about 20 seconds.

Discuss
Answer: (d).Minimum recommended downcomer residence time for the disengagement of entrained vapour is the same for both foaming and non-foaming liquids, which is about 20 seconds.
Q80.
Generally, no corrosion allowance in wall thickness of a part is required, if the thickness is more than __________ mm.

a.

10

b.

20

c.

30

d.

5

Discuss
Answer: (c).30
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