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 11 of 35

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Q101.
Relationship between absorption/evolution of heat at the thermocouple junctions and the current flow in the circuit is given by __________ effect.

a.

Peltier

b.

Thomson

c.

Seebeck

d.

none of these

Discuss
Answer: (a).Peltier
Q102.
Configuration of Bourdon spring tube is never made of __________ shape.

a.

circular

b.

semi-circular

c.

helical

d.

spiral

Discuss
Answer: (a).circular
Q103.
Thermodynamic celcius scale of temperature measurement is

a.

defined on the basis of melting point of ice and evaporation temperature of water vapor.

b.

defined on the basis of melting point of ice and condensation temperature of water vapor.

c.

having an interval of 100° between ice point to steam point.

d.

both (b) and (c)

Discuss
Answer: (d).both (b) and (c)
Q104.
According to Bode stability criterian, a system is unstable, if the open loop frequency response exhibits an amplitude ratio exceeding unity at frequency for which phase lag is

a.

0°

b.

45°

c.

90°

d.

180°

Discuss
Answer: (d).180°
Q105.
In a closed loop system, the process to be controlled is an integrating process with transfer function 1/2s. The controller proposed to be used in an integral controller with transfer function 1/T₁s. When a step change in set point is applied to such a closed loop system, the controlled variable will exhibit

a.

overdamped response.

b.

underdamped response.

c.

undamped response.

d.

unstable response.

Discuss
Answer: (b).underdamped response.
Q106.
Flow rate of those fluids which are insensitive to changes in their density, viscosity or flow velocity profile can be best measured by a

a.

magnetic flowmeter

b.

pitot tube

c.

flow nozzle type flowmeter

d.

turbine flowmeter

Discuss
Answer: (a).magnetic flowmeter
Q107.
Identify an unbounded input from inputs whose transfer functions are given below

a.

1

b.

1/S

c.

1/S²

d.

1/(S² + 1)

Discuss
Answer: (c).1/S²
Q108.
"A control system is unstable, if the open loop frequency response exhibits an amplitude ratio exceeding unity at the crossover frequency." This is __________ criterion.

a.

Bode stability

b.

Nyquist

c.

Routh stability

d.

none of these

Discuss
Answer: (a).Bode stability
Q109.
Feed forward controller accounts for the __________ changes.

a.

set point

b.

load

c.

both (a) & (b)

d.

neither (a) nor (b)

Discuss
Answer: (b).load
Q110.
Which thermocouple can be used to measure a temperature of around 1400°C ?

a.

Copper-constantan

b.

Aluminium-chromel

c.

Platinum-platinum+rhodium

d.

None of these

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