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.
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°
Q322.
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
Q323.
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
Q324.
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
Q325.
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
Q326.
A CT is used to feed current coils of wattmeter, energy meter, power factor meter and an ammeter. Then

a.

all the coils are in series

b.

all coils are in parallel

c.

the coils are in series-parallel

d.

either (a) or (b)

Discuss
Answer: (a).all the coils are in series
Q327.
In measurements using strain gauge, the dummy strain gauge is used to

a.

compensate for resistance of strain gauge

b.

compensate for change in temperature

c.

compensate for error due to change in voltage of battery

d.

compensate for error in voltmeter

Discuss
Answer: (b).compensate for change in temperature
Q328.
In an ac single phase energy meter, the potential coil is put on

a.

both side limbs, of upper magnet

b.

central limb of upper magnet

c.

one side limb of upper magnet

d.

either (a) or (b)

Discuss
Answer: (b).central limb of upper magnet
Q329.
The chemical effect of current is used in

a.

dc ampere hour meter

b.

dc ammeter

c.

ac energy meter

d.

all of the above

Discuss
Answer: (a).dc ampere hour meter
Q330.
The switch board instruments

a.

should be mounted in vertical position

b.

should be mounted in horizontal position

c.

should be mounted at about 45°

d.

should be mounted at about 80°

Discuss
Answer: (a).should be mounted in vertical position
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