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 21 of 35

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Q201.
To increase the speed of response of a pressure spring liquid or gas expansion thermometer, the clearance space between the thermometer bulb and the thermal well should not be filled with

a.

air

b.

a metal powder or graphite

c.

oil

d.

mercury

Discuss
Answer: (a).air
Q202.
In a second order under damped system, the

a.

time required for the response of first reach its ultimate value is called the response time.

b.

overshoot (which is a measure of how much the response exceeds the ultimate value) increase with the decrease of damping co-efficient e.

c.

decay ratio (which is the ratio of the sizes of successive peaks) is equal to the reciprocal of overshoot.

d.

None of the above

Discuss
Answer: (b).overshoot (which is a measure of how much the response exceeds the ultimate value) increase with the decrease of damping co-efficient e.
Q203.
In an exothermic chemical reactor, the manipulated variable is the flow rate of

a.

coolant

b.

reactants

c.

product

d.

none of these

Discuss
Answer: (a).coolant
Q204.
Very low pressure is expressed in microns(ฮผ), which is equal to __________ mm of Hg coloumn (absolute) at 0°C.

a.

0.0001

b.

0.001

c.

0.01

d.

0.1

Discuss
Answer: (b).0.001
Q205.
Which of the following is not a second order instrument ?

a.

Mercury in glass thermometer with covering.

b.

Bare mercury in glass thermometer.

c.

Pressure gauge with one bellow, two tubes and a tank.

d.

None of these.

Discuss
Answer: (b).Bare mercury in glass thermometer.
Q206.
Small furnace draught is accurately measured by an inclined tube manometer, in which the manometric liquid used most commonly is

a.

water

b.

carbon tetrachloride

c.

paraffin

d.

ethylene glycol

Discuss
Answer: (c).paraffin
Q207.
Specific conductance is defined as the reciprocal of resistance in ohms of 1c.c. of liquid at a specified temperature. Its value for distilled water is about __________ micro mho/cm³.

a.

50

b.

100

c.

10

d.

1

Discuss
Answer: (d).1
Q208.
A simple pitot tube measures the

a.

average velocity

b.

maximum velocity

c.

point velocity

d.

static pressure

Discuss
Answer: (d).static pressure
Q209.
For a feed back control system to be stable, the

a.

roots of the characteristic equation should be real.

b.

poles of the closed loop transfer function should lie in the left half of the complex plane.

c.

Bode plots of the corresponding open loop transfer function should monotoni-cally decrease.

d.

poles of the closed loop transfer function should lie in the right half of the complex plane.

Discuss
Answer: (b).poles of the closed loop transfer function should lie in the left half of the complex plane.
Q210.
__________ is the static characteristics of an instrument,

a.

Response

b.

Tine lag

c.

Drift

d.

dynamic error

Discuss
Answer: (c).Drift
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