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 2 of 35

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Q11.
A process is initially at steady state with its output y=1 for an input u=1. The input is suddenly changed to 2 at time t=0. The output response is y(t)=1+2t. The transfer function of the process is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (d).D
Q12.
Which of the systems having the following transfer function is stable ?

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (c).C
Q13.
The calibration data of a thermocouple with its cold junction at 0°C are given below.
The hot junction of the thermocouple is placed in a bath at 80°C, while its cold junction is at 20°C. What is the emf of thermocouple ?

a.

3.26 mv

b.

0.80 mv

c.

2.46 mv

d.

2.43 mv

Discuss
Answer: (c).2.46 mv
Q14.
The frequency response of a dynamic element shows a constant magnitude ratio at all frequencies. The element exhibits a negative phase shift at all frequencies. The absolute value of the phase shift increases linearly with frequency. The element has the transfer function

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
Q15.
For the block diagram shown below, the characteristic equation is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (c).C
Q16.
The experimental response of the controlled variable y(t) for a step change of magnitude P in the manipulated variable x(t) is shown below.
The appropriate transfer function of the process is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (c).C
Q17.
The open loop transfer function of a process is given below. In the root locus diagram, the poles will be at

a.

-1, -4

b.

1, 4

c.

-2, -3

d.

2, 3

Discuss
Answer: (c).-2, -3
Q18.
Water is entering a storage tank at a temperature T₀ and flow rate Q₀ and leaving at a flow rate Q and temperature T. There are negligible heat losses in the tank. The area of cross-section of the tank is A₀. The model that describes the dynamic variation of temperature of water in the tank with time is given as :

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
Q19.
The transfer function of a second order system is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
Q20.
The Laplace transform of a sinusoidal function (eg; sin at) is represented by the curve

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
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