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 7 of 35

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Q61.
A negative gain margin expressed in decibels means a/an __________ system.

a.

stable

b.

unstable

c.

critically damped

d.

none of these

Discuss
Answer: (b).unstable
Q62.
Thermistor, which has high temperature co-efficient of resistivity, is used as the sensing element in resistance thermometer. It is a/an

a.

insulator

b.

conductor

c.

solid semi-conductor

d.

liquid semi-conductor

Discuss
Answer: (c).solid semi-conductor
Q63.
Flapper nozzle is used in a/an __________ controller.

a.

electronic

b.

hydraulic

c.

pneumatic

d.

none of these

Discuss
Answer: (c).pneumatic
Q64.
Compositional analysis of __________ is done using mass spectrometer.

a.

an isotope

b.

natural gas

c.

a solid

d.

an alloy

Discuss
Answer: (a).an isotope
Q65.
The function of a transducer is to

a.

modify the input signal.

b.

amplify the input signal.

c.

convert the primary signal into a more useful quantity, usually an electric impulse.

d.

codify/decodify the input signal.

Discuss
Answer: (c).convert the primary signal into a more useful quantity, usually an electric impulse.
Q66.
Nichol's chart deals with

a.

A.R. vs. phase lag of first order.

b.

A.R. vs. phase lag of second order.

c.

closed loop values vs. open loop values.

d.

frequency response values of controllers.

Discuss
Answer: (c).closed loop values vs. open loop values.
Q67.
Which of the following thermocouples will give the highest output for the same value of hot and cold junction temperature ?

a.

Platinum-platinum + rhodium.

b.

Iron-constantan.

c.

Chromel-constantan.

d.

All will give the same output.

Discuss
Answer: (c).Chromel-constantan.
Q68.
A proportional controller with a gain of Kc is used to control a first order process. The offset will increase, if

a.

Kc is reduced.

b.

Kc is increased.

c.

integral control action is introduced.

d.

derivative control action is introduced.

Discuss
Answer: (a).Kc is reduced.
Q69.
The __________ of a vapor pressure thermometer is a secondary element.

a.

pointer

b.

Bourdon tube

c.

bulb

d.

none ofthese

Discuss
Answer: (b).Bourdon tube
Q70.
Emf developed by a thermocouple, while measuring a temperature of 600°C is about 5.5 mV. The type of thermocouple used is

a.

chromel-alumel

b.

iron-constantan

c.

platinum-platinum+rhodium

d.

either (a), (b) or (c)

Discuss
Answer: (c).platinum-platinum+rhodium
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