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

Discover more Topics under Electronics and Communication Engineering

Q81.
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
Q82.
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.
Q83.
In a thermocouple temperature transducer, the output voltage is usually measured by

a.

high resistance ammeter

b.

high resistance voltmeter

c.

high resistance milli-voltmeter

d.

none of the above

Discuss
Answer: (c).high resistance milli-voltmeter
Q84.
A moving iron instrument gives correct reading when used at

a.

low frequencies

b.

high frequencies

c.

only one frequency

d.

all frequencies upto a certain value

Discuss
Answer: (c).only one frequency
Q85.
Induction wattmeter can be used in

a.

ac circuit only

b.

dc circuit only

c.

both ac and dc circuit

d.

ac 3 phase only

Discuss
Answer: (a).ac circuit only
Q86.
A meter has a square law scale. For 2 A current the deflection in 90°. For a deflection of 45°, the current is

a.

1 A

b.

1.5 A

c.

1.414 A

d.

1.61 A

Discuss
Answer: (c).1.414 A
Q87.
Assertion (A): CRT is the most important component of a CRO.

Reason (R): When an electron beam strikes the screen of CRT, a spot of light is produced.

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
Q88.
A capacitance transducer has two plates each of area 5 mm². The coil gap is 2 mm. Displacement sensitivity due to change in gap length is

a.

11.1 pF/cm

b.

44.2 pF/cm

c.

52.3 pF/cm

d.

66.3 pF/cm

Discuss
Answer: (a).11.1 pF/cm
Q89.
Four capacitors are in parallel. Their values are 36.3 ฮผF, 3.85 ฮผF, 34.002 ฮผF and 850 ฮผF with an uncertainty of digit in the last place. The total capacitance in significant figures is

a.

75.0 ฮผF

b.

75.0 ± 0.1 ฮผF

c.

75.1 ± 0.1 ฮผF

d.

75.002 ± 0.1 ฮผF

Discuss
Answer: (b).75.0 ± 0.1 ฮผF
Q90.
In a single phase power factor meter the phase difference between currents in the two pressure coils is

a.

exactly 0°

b.

approximate 0°

c.

exactly 90°

d.

approximate 90°

Discuss
Answer: (c).exactly 90°
Page 9 of 51