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 33 of 35

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Q321.
The thermal emf-temperature relationship of most thermocouples is

a.

linear

b.

parabolic

c.

exponential

d.

square root

Discuss
Answer: (b).parabolic
Q322.
Which is the strongest paramagnetic gas?

a.

CO₂

b.

O₂

c.

NO

d.

NO₂

Discuss
Answer: (b).O₂
Q323.
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
Q324.
A first order system with unity gain and time constant τ is subjected to a sinusoidal input of frequency w = 1/τ. The amplitude ratio for this system is

a.

1

b.

0.5

c.

1/√2

d.

0.25

Discuss
Answer: (c).1/√2
Q325.
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)
Q326.
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
Q327.
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
Q328.
Mercury thermometer is commonly used for low temperature measruement. The freezing point and boiling point of mercury are respectively __________ °C.

a.

- 39 and 350

b.

- 51 and 439

c.

- 79 and 395

d.

- 10 and 425

Discuss
Answer: (a).- 39 and 350
Q329.
Which of the following thermocouples has the least temperature measurement range?

a.

Copper-constantan

b.

Chromel-alumel

c.

Platinum-platinum/rhodium

d.

Iron-constantan

Discuss
Answer: (a).Copper-constantan
Q330.
Change of angle of refraction with composition comprises the working principle of a

a.

polarimeter

b.

polarograph

c.

spectrometer

d.

refractrometer

Discuss
Answer: (d).refractrometer
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