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 8 of 51

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Q71.
The channel required for FM telemetry is

a.

same as required for AM telemetry

b.

smaller than that required by AM telemetry

c.

100 times that required for AM telemetry

d.

10 times that required for AM telemetry

Discuss
Answer: (c).100 times that required for AM telemetry
Q72.
In two wattmeter method of 3 phase power measurement, when does one wattmeter read negative

a.

when power factor is less than 0.5 lagging

b.

when power factor is greater than 0.5 lagging

c.

when power factor is less than 0.5

d.

when power factor is unity

Discuss
Answer: (c).when power factor is less than 0.5
Q73.
It is required to measure angular position. Out of the transducers

1.Circular potentiometer
2. LVDT
3. E pick up
4. Synchro

The proper devices are

a.

1, 2, 3, 4

b.

2 and 3

c.

1, 2, 4

d.

1 and 4

Discuss
Answer: (d).1 and 4
Q74.
To increase Q factor of a coil, the wire should be

a.

long

b.

thin

c.

thick

d.

long and thin

Discuss
Answer: (c).thick
Q75.
An ammeter of 0-25 A range has a guaranteed accuracy of 1% of full scale reading. The current measured is 5 A. The limiting error is

a.

2%

b.

2.5%

c.

4%

d.

5%

Discuss
Answer: (d).5%
Q76.
The coil of a moving iron instrument has a resistance of 500 ฮฉ and an inductance of 1 H. It reads 250 V when a 250 V dc is applied. If series resistance is 2000 ฮฉ, its reading when fed by 250 V, 50 Hz ac will be

a.

260 V

b.

252 V

c.

250 V

d.

248 V

Discuss
Answer: (d).248 V
Q77.
Assertion (A): Absolute instruments are used in standard laboratories.

Reason (R): Absolute instruments do not require calibration.

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: (b).Both A and R are true but R is not correct explanation of A
Q78.
Assertion (A): A 3 phase wattmeter consists of two wattmeters mounted in one case.

Reason (R): Power measurement in a 3 phase circuit can be conveniently done by two wattmeter method.

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: (a).Both A and R are true and R is correct explanation of A
Q79.
A digital voltmeter can count from 0 to 9999. If full scale reading is 9.999 V, the resolution of full scale reading is

a.

0.001

b.

1000

c.

2 digit

d.

1 mV

Discuss
Answer: (d).1 mV
Q80.
The most serious problems in ac bridge measurement is

a.

eddy currents

b.

leakage current

c.

residual magnetism

d.

stray fields

Discuss
Answer: (d).stray fields
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