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

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Q51.
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
Q52.
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
Q53.
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
Q54.
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
Q55.
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
Q56.
Which of the following voltmeters would you use for measuring voltage across 20 kΩ resistance?

a.

Voltmeter having a resistance of 5 kΩ

b.

Voltmeter having a sensitivity of 1 kW/V

c.

Voltmeter having sensitivity of 10 kW/V

d.

None of the above

Discuss
Answer: (c).Voltmeter having sensitivity of 10 kW/V
Q57.
A single phase energy meter has the rating 1200 resolutions/ kWh. If a 500 W electric gadget is used for 4 hours, the energy meter will make

a.

1200 revolutions

b.

1800 revolutions

c.

2100 revolutions

d.

2400 revolutions

Discuss
Answer: (d).2400 revolutions
Q58.
Assertion (A): De sauty's bridge is suitable only for pure capacitor.

Reason (R): Capacitors are mostly perfect.

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
Q59.
In which of the transformer is the secondary nearly short circuited under normal operating conditions?

a.

CT

b.

PT

c.

Distribution transformer

d.

Power transformer

Discuss
Answer: (a).CT
Q60.
The Lissajous pattern observed on screen of CRO is a straight line inclined at 45° to x axis. If X-plate input is 2 sin ωt, the Y-plate input is

a.

2 sin ωt

b.

2 sin (ωt + 45°)

c.

2 sin (ωt - 45°)

d.

2√2 sin ωt + 45°)

Discuss
Answer: (a).2 sin ωt
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