Process Control and Instrumentation MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Process Control and Instrumentation, 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 Control and Instrumentation 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 Control and Instrumentation mcq questions that explore various aspects of Process Control and Instrumentation problems. Each MCQ is crafted to challenge your understanding of Process Control and Instrumentation 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 Control and Instrumentation 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 Control and Instrumentation. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

So, are you ready to put your Process Control and Instrumentation knowledge to the test? Let's get started with our carefully curated MCQs!

Process Control and Instrumentation MCQs | Page 32 of 35

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Q311.
Continuous measurement of moisture content of paper in paper industry is done by measuring the

a.

thermal conductivity through the paper

b.

electrical resistance through the paper

c.

magnetic susceptibility

d.

none of these

Discuss
Answer: (b).electrical resistance through the paper
Q312.
Thermal well made of __________ gives the fastest speed of response, while measuring temperature by thermocouples.

a.

steel

b.

vycor (a glass)

c.

nichrome

d.

inconel

Discuss
Answer: (b).vycor (a glass)
Q313.
On-off control which is a special case of proportional control, has a band width of about __________ percent.

a.

100

b.

75

c.

25

d.

0

Discuss
Answer: (d).0
Q314.
The thermal emf-temperature relationship of most thermocouples is

a.

linear

b.

parabolic

c.

exponential

d.

square root

Discuss
Answer: (b).parabolic
Q315.
Which is the strongest paramagnetic gas?

a.

COโ‚‚

b.

Oโ‚‚

c.

NO

d.

NOโ‚‚

Discuss
Answer: (b).Oโ‚‚
Q316.
In Bode plot, A.R. vs. w is plotted on a/an __________ graph paper.

a.

log-lag

b.

triangular

c.

ordinary

d.

semi-log

Discuss
Answer: (a).log-lag
Q317.
A first order system with unity gain and time constant ฯ„ is subjected to a sinusoidal input of frequency w = 1/ฯ„. The amplitude ratio for this system is

a.

1

b.

0.5

c.

1/โˆš2

d.

0.25

Discuss
Answer: (c).1/โˆš2
Q318.
Temperature of molten pig iron (1450°C) and molten slag (1500°C) flowing out of a blast furnace is measured by a/an

a.

chromel-alumel thermocouple

b.

optical pyrometer

c.

radiation pyrometer

d.

either (b) or (c)

Discuss
Answer: (d).either (b) or (c)
Q319.
For two non-interacting first order systems connected in series, the overall transfer function is the __________ of the individual transfer functions.

a.

product

b.

ratio

c.

sum

d.

difference

Discuss
Answer: (a).product
Q320.
Ordinary mercury in glass thermometer is used for measuring temperature upto 120°C. However, for measuring higher temperature upto __________ °C, thermometer is made by filling nitrogen under pressure above the mercury, which stops the evaporation of mercury and reduces the chance of broken thread of mercury.

a.

250

b.

350

c.

550

d.

700

Discuss
Answer: (c).550
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