Measurements and Instrumentation MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Measurements and Instrumentation, a fundamental topic in the field of Electronics and Communication Engineering. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Measurements 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 Measurements and Instrumentation mcq questions that explore various aspects of Measurements and Instrumentation problems. Each MCQ is crafted to challenge your understanding of Measurements and Instrumentation principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Electronics and Communication Engineering tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Measurements and Instrumentation MCQs are your pathway to success in mastering this essential Electronics and Communication Engineering topic.

Note: Each of the following question comes with multiple answer choices. Select the most appropriate option and test your understanding of Measurements 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 Measurements and Instrumentation knowledge to the test? Let's get started with our carefully curated MCQs!

Measurements and Instrumentation MCQs | Page 9 of 51

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Q81.
A 24 mm long conductor has a resistance of 128 ฮฉ. The change in resistance is 13.3 ฮฉ and change in length is 1.6 mm under tension. The gauge factor is

a.

1.2

b.

1.6

c.

2.1

d.

2.6

Discuss
Answer: (b).1.6
Q82.
Measuring of unknown voltage with a dc potentiometer loses its advantage of open circuit measurement when

a.

primary circuit battery is changed

b.

standardisation is done to compensate for drift

c.

voltage is larger than range of potentiometer

d.

range reduction by factor of 10 is employed

Discuss
Answer: (d).range reduction by factor of 10 is employed
Q83.
In a digital measuring device the input electrical signal is in the frequency range of dc to ac (50) Hz. It must be sampled at a rate of

a.

f times/sec

b.

0.5 f times/sec

c.

0.25 f times/sec

d.

2 f times/sec

Discuss
Answer: (d).2 f times/sec
Q84.
The volt ratio box is basically a

a.

potential divider

b.

current transformer

c.

a high resistance voltmeter

d.

either (a) or (c)

Discuss
Answer: (a).potential divider
Q85.
A sinusoidal ac voltage of amplitude 100 V is applied to a rectifying device which offers 10 ฮฉ resistance in forward direction and infinite resistance in backward direction. A moving coil ammeter is also connected in the circuit. The reading of ammeter will be

a.

10 A

b.

5 A

c.

3.185 A

d.

14.14 A

Discuss
Answer: (c).3.185 A
Q86.
A variable reluctance tachometer has 180 teeth on rotor. The speed of shaft on which it is mounted in 1200 rpm. The frequency of output pulses is

a.

1800 per second

b.

3600 per second

c.

4800 per second

d.

5600 per second

Discuss
Answer: (b).3600 per second
Q87.
Assertion (A): Wien bridge can be used for measuring frequency.

Reason (R): A frequency meter for 50 Hz system has a frequency range of 40 to 60 Hz.

a.

Both A and R are true and R is correct explanation of A

b.

Both A and R are true but R is not correct explanation of A

c.

A is true R is false

d.

A is false R is true

Discuss
Answer: (c).A is true R is false
Q88.
Which of these has poor overload capacity?

a.

PMMC instrument

b.

Hot wire instrument

c.

Dynamometer instrument

d.

Both (a) and (c)

Discuss
Answer: (b).Hot wire instrument
Q89.
In 3 phase power measurement by two wattmeter method, both wattmeters had equal reading. The power factor of load is

a.

1

b.

0.5 lagging

c.

0.5 leading

d.

0

Discuss
Answer: (a).1
Q90.
Which instrument is based on induction principle?

a.

Dynamometer wattmeter

b.

Induction wattmeter

c.

Energy meter

d.

Both (b) and (c)

Discuss
Answer: (d).Both (b) and (c)
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