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.
PCM employing 4 bit code is used to send data having frequency range from 0 to 2 kHz. The minimum required bandwidth of carrier channel is

a.

2 kHz

b.

4 kHz

c.

8 kHz

d.

16 kHz

Discuss
Answer: (b).4 kHz
Q82.
A sinusoidal ac voltage of amplitude 100 V is applied to a rectifying device which offers 10 Ω resistance in forward direction and infinite resistance in reverse direction. The reading on hot wire ammeter will be

a.

10 A

b.

5 A

c.

3.185 A

d.

1.414 A

Discuss
Answer: (b).5 A
Q83.
When a capacitor is connected to the terminals of an ohmmeter, the pointer indicated a low resistance initially and finally come to infinity position. This shows that capacitor is

a.

short circuited

b.

all right

c.

faulty

d.

open circuited

Discuss
Answer: (b).all right
Q84.
Consider the following operation in respect of Wheatstone bridge (Kb, denotes battery key, Kg denotes galvanometer key)

1. open Kb
2. close Kg
3. close Kb
4. open Kg

The correct sequence of operations is

a.

1, 2, 3, 4

b.

3, 1, 2, 4

c.

4, 3, 2, 1

d.

3, 2, 4, 1

Discuss
Answer: (d).3, 2, 4, 1
Q85.
Two voltmeters 0-250 V each having resistances of 5 kΩ and 10 kΩ respectively and are connected in series. To ensure that neither of them goes beyond scale the total voltage which can be applied should be less than

a.

500 V

b.

400 V

c.

375 V

d.

250 V

Discuss
Answer: (c).375 V
Q86.
A 24 mm long conductor has a resistance of 128 Ω. The change in resistance is 13.3 Ω 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
Q87.
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
Q88.
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
Q89.
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
Q90.
A sinusoidal ac voltage of amplitude 100 V is applied to a rectifying device which offers 10 Ω 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
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