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 6 of 51

Discover more Topics under Electronics and Communication Engineering

Q51.
In ac bridge measurements, 'Wagner ground' means

a.

a special RC connection to eliminate stray magnetic effects

b.

a special RC connection to eliminate stray capacitance effects

c.

an unwanted and unintended ground connection

d.

a large metal plate buried in ground connected to one corner of bridge

Discuss
Answer: (b).a special RC connection to eliminate stray capacitance effects
Q52.
A piezoelectric force transducer has a charge sensitivity of 20 pC/N. It is connected to a charge amplifier and overall gain of transducer and amplifier is 50 mV/N. The gain of amplifier is

a.

1 mV/pC

b.

1.5 mV/pC

c.

2.5 mV/pC

d.

4 mV/pC

Discuss
Answer: (c).2.5 mV/pC
Q53.
An LVDT is used to measure displacement. The LVDT feeds a Voltmeter of 0-5 V range through a 250 gain amplifier. For a displacement 0.5 mm the output of LVDT is 2 mV. The sensitivity of instrument is

a.

0.1 V/mm

b.

0.5 V/mm

c.

1 V/mm

d.

5 V/mm

Discuss
Answer: (c).1 V/mm
Q54.
Assertion (A): When a wattmeter is used for low impedance loads, the pressure coil is connected across the load.

Reason (R): A wattmeter measures apparent power.

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
Q55.
As per BIS there are 6 accuracy classes of instruments.

a.

True

b.

False

c.

May be True or False

d.

can't say

Discuss
Answer: (b).False
Q56.
If reference sound pressure P₀ is 2 x 10¯⁵ N/m², a sound pressure of 90 dB is equal to

a.

0.632 N/m²

b.

0.707 N/m²

c.

0.835 N/m²

d.

0.925 N/m²

Discuss
Answer: (a).0.632 N/m²
Q57.
In a platinum RTD, the change in resistance for a temperature rise of 50° C is about

a.

2%

b.

10%

c.

20%

d.

40%

Discuss
Answer: (c).20%
Q58.
The gauge factor of a semiconductor strain gauge is about

a.

2

b.

10

c.

100

d.

1000

Discuss
Answer: (c).100
Q59.
Which of the following instruments is used almost exclusively to measure radio frequency currents?

a.

Moving coil

b.

Rectifier

c.

Moving iron

d.

Thermocouple

Discuss
Answer: (d).Thermocouple
Q60.
The coil of a DArsonval galvanometer has N turns. If flux density is B, current is I and area of coil is A, the deflecting torque is

a.

NBI/A

b.

NBIA

c.

NIA/B

d.

N2IAB

Discuss
Answer: (b).NBIA
Page 6 of 51