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 16 of 51

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Q151.
Assertion (A): In hot wire instrument the material of hot wire in generally platinum iridium.

Reason (R): A hot wire ammeter is suitable for ac only

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: (c).A is true R is false
Q152.
The scale of hot wire ammeter is

a.

linear

b.

non-linear

c.

cramped

d.

absolute linear

Discuss
Answer: (b).non-linear
Q153.
A moving coil meter has a shunt of 0.02 ฮฉ resistance. If coil resistance is 1000 ฮฉ and a potential difference of 500 mV is required across it to cause full scale deflection, the current through shunt is

a.

2.5 A

b.

25 A

c.

0.25 A

d.

0.025 A

Discuss
Answer: (b).25 A
Q154.
The emf of a Weston cell is 1.286 V.

a.

True

b.

False

c.

May be True or False

d.

can't say

Discuss
Answer: (b).False
Q155.
The power factor of a single phase load can be calculated if instruments available are

a.

one voltmeter, one ammeter

b.

two ammeters

c.

two voltmeters

d.

one voltmeter, one ammeter and one wattmeter

Discuss
Answer: (d).one voltmeter, one ammeter and one wattmeter
Q156.
A variable reluctance type tachometer has 150 teeth on rotor. The counter records 13500 pulse/sec. The rotational speed is

a.

4800 RPM

b.

5400 RPM

c.

6000 RPM

d.

7200 RPM

Discuss
Answer: (b).5400 RPM
Q157.
The current through the coil of an electromagnet is doubled. The magnetic field around the coil

a.

is halved

b.

is doubled

c.

becomes four times

d.

remains the same

Discuss
Answer: (b).is doubled
Q158.
In a moving iron voltmeter the coil has a resistance of 20 ฮฉ and an inductance of 0.3 H. The swamping resistance in 2000 ฮฉ. To ensure correct reading with dc as well as 50 Hz ac, the value of capacitor to be connected in parallel with swamping resistance should be

a.

0.0125 ฮผF

b.

0.0311 ฮผF

c.

0.0521 ฮผF

d.

0.0622 ฮผF

Discuss
Answer: (b).0.0311 ฮผF
Q159.
Two resistances R1 = 18.7 ฮฉ. and R2 = 3.624 ฮฉ in series. The total resistance to the appropriate number of significant figures is

a.

22.324 ฮฉ

b.

22.32 ฮฉ

c.

22.3 ฮฉ

d.

22 ฮฉ

Discuss
Answer: (c).22.3 ฮฉ
Q160.
The input impedance of CRO is about

a.

zero

b.

10 ฮฉ

c.

100 ฮฉ

d.

one mega ohm

Discuss
Answer: (d).one mega ohm
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