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.
Potentiometer method of dc voltage measurement is more accurate than direct measurement using a voltmeter because

a.

it loads the circuit to maximum extent

b.

it loads the circuit moderately

c.

it does not load the circuit at all

d.

it uses centre zero galvanometer instead of Voltmeters

Discuss
Answer: (c).it does not load the circuit at all
Q82.
Assertion (A): A hot wire ammeter has a cramped scale.

Reason (R): The heat is proportional to square of current.

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
Q83.
Which of the following is true about an impulse voltage?

a.

It is a unidirectional voltage

b.

Chopped impulse flashover does not occur

c.

Time taken to rise is equal to time taken to fall

d.

RMS value is always less than 50% of average value

Discuss
Answer: (a).It is a unidirectional voltage
Q84.
Which of the following are needed both for protection and metering?

a.

Wattmeters

b.

Instrument transformers

c.

Energy meters

d.

Power factor meters

Discuss
Answer: (b).Instrument transformers
Q85.
A digital frequency counter can be converted to DVM by addition of a suitable

a.

voltage controlled oscillator

b.

D/A converter

c.

power amplifier

d.

operational amplifier

Discuss
Answer: (b).D/A converter
Q86.
A dynamometer wattmeter is connected in ac circuit. The reading will be

a.

V-A product

b.

average power

c.

peak power

d.

instantaneous power

Discuss
Answer: (b).average power
Q87.
The speed transducer using a drag cup rotor has the main advantage of

a.

very high accuracy

b.

low energy requirement

c.

cheap construction

d.

all of the above

Discuss
Answer: (b).low energy requirement
Q88.
A voltmeter using thermocouples measures

a.

rms value

b.

peak value

c.

average value

d.

peak to peak value

Discuss
Answer: (a).rms value
Q89.
Which of the following measurements using a dc potentiometer do not require standardisation of potentiometer?

a.

Measurement of unknown voltage

b.

Measurement of resistance

c.

Measurement of unknown current

d.

Calibration of voltmeter

Discuss
Answer: (b).Measurement of resistance
Q90.
Which of the following statement is correct for two wattmeters method of power measurement in 3 phase circuit?

a.

Power can be measured by this method only for star connected loads

b.

When two wattmeters have equal readings power factor is 0.5.

c.

When power factor is 1, one of the wattmeters readings is zero

d.

When the two wattmeter read equal and opposite, p.f. is zero.

Discuss
Answer: (d).When the two wattmeter read equal and opposite, p.f. is zero.
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