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 29 of 35

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Q281.
Which of the following thermocouples has the widest temperature measurement range ?

a.

Iron-constantan

b.

Chromel-alumel

c.

Copper-constantan

d.

Platinum-platinum/rhodium

Discuss
Answer: (d).Platinum-platinum/rhodium
Q282.
Temperature control of an exothermic chemical reaction taking place in a CSTR is done with the help of cooling water flowing in a jacket around the reactor. The types of valve and controller action to be recommended are

a.

air to open valve with the controller direct acting.

b.

air to close valve with the controller indirect acting.

c.

air to open valve with the controller indirect acting.

d.

air to close valve with the controller direct acting.

Discuss
Answer: (c).air to open valve with the controller indirect acting.
Q283.
Bourdon tube is never made of

a.

phosphor bronze

b.

monel metal

c.

stainless steel

d.

cast iron

Discuss
Answer: (d).cast iron
Q284.
"An emf of the order of mV is generated when two solutions of different hydrogen ion concentration are separated by a thin glass wall". This is the working principle of a

a.

pH meter

b.

polarimeter

c.

chromatograph

d.

polarograph

Discuss
Answer: (a).pH meter
Q285.
Liquid flow rate in an open channel can not be measured by a/an

a.

orifice meter

b.

cipolletti weir

c.

rectangular weir

d.

V-notch

Discuss
Answer: (a).orifice meter
Q286.
The unit of 'time constant' of a system is the same as that of

a.

velocity

b.

time

c.

(time)⁻¹

d.

none of these

Discuss
Answer: (b).time
Q287.
Which of the following filled system expansion thermometers has the lowest positive temperature measurement capability ?

a.

Mercury in glass thermometer.

b.

Alcohol in glass thermometer.

c.

Fused metal (Na or K) in steel thermometer.

d.

Nitrogen in steel thermometer.

Discuss
Answer: (b).Alcohol in glass thermometer.
Q288.
Liquid column manometers are used for measuring the pressure __________ kgf/cm² .

a.

> 2(gage)

b.

< 3 (gage)

c.

< 10 (gage)

d.

< atmospheric

Discuss
Answer: (b).< 3 (gage)
Q289.
Cascade control means

a.

feed forward control.

b.

more than one feed-back loop.

c.

on-off control.

d.

one feed-back loop.

Discuss
Answer: (b).more than one feed-back loop.
Q290.
Pyrometry refers to the measurement of temperature

a.

with the mercurial thermometer upto 350°C.

b.

directly.

c.

which is of higher magnitude.

d.

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

Discuss
Answer: (c).which is of higher magnitude.
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