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 33 of 51

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Q321.
Pirani gauge is used to measure

a.

very low pressure

b.

high pressure

c.

pressure in the range of 1 atmosphere

d.

fluid flow

Discuss
Answer: (a).very low pressure
Q322.
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
Q323.
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
Q324.
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
Q325.
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°
Q326.
In an ac coordinate potentiometer, the currents inphase and quadrature potentiometer are adjusted to be

a.

out of phase by 90°

b.

in phase

c.

out of phase by 45°

d.

out of phase 180°

Discuss
Answer: (a).out of phase by 90°
Q327.
Both X and Y plates of a CRO are excited by ac signals. The display is an ellipse which makes one rotation in 5 seconds. This means that

a.

the frequency of one input is 5 times that of other

b.

the difference between the frequencies of the two signals is one fifth of hertz

c.

the difference between the frequencies of the two signals is 5 Hz

d.

either (a) or (c)

Discuss
Answer: (b).the difference between the frequencies of the two signals is one fifth of hertz
Q328.
In order to achieve accuracy, the slide wire of a potentiometer should be

a.

as long as possible

b.

as short as possible

c.

neither too long nor too short

d.

very thin

Discuss
Answer: (a).as long as possible
Q329.
In measuring resistance using voltmeter and ammeter, the resistances of voltmeter and ammeter also affect the accuracy of measurement.

a.

True

b.

False

c.

May be True or False

d.

can't say

Discuss
Answer: (a).True
Q330.
A permanent magnet moving coil measures

a.

true rms value

b.

dc value

c.

peak value

d.

rms plus dc value

Discuss
Answer: (b).dc value
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