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 24 of 51

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Q231.
An ammeter of 0-25 A range has a guaranteed accuracy of 1% of full scale reading. The current measured is 5 A. The limiting error is

a.

2%

b.

2.5%

c.

4%

d.

5%

Discuss
Answer: (d).5%
Q232.
The coil of a moving iron instrument has a resistance of 500 ฮฉ and an inductance of 1 H. It reads 250 V when a 250 V dc is applied. If series resistance is 2000 ฮฉ, its reading when fed by 250 V, 50 Hz ac will be

a.

260 V

b.

252 V

c.

250 V

d.

248 V

Discuss
Answer: (d).248 V
Q233.
In 3 phase power measurement by two wattmeter method, the reading of one wattmeter is zero. The power factor of load is

a.

1

b.

0.5

c.

0

d.

0.8

Discuss
Answer: (b).0.5
Q234.
In a CRO which of the following is not a part of electron gun

a.

cathode

b.

grid

c.

accelerating anode

d.

X - Y plates

Discuss
Answer: (d).X - Y plates
Q235.
In a ballistic galvanometer, a charge of 100 ฮผC gives a first swing of 25°. The charge required to cause first swing of 50° is

a.

200 ฮผC

b.

400 ฮผC

c.

50 ฮผC

d.

25 ฮผC

Discuss
Answer: (b).400 ฮผC
Q236.
Two resistors R1 = 36 ฮฉ ± 5% and R2 = 75 ฮฉ ± 5% are connected in series. The total resistance is

a.

111 ± 0 ฮฉ

b.

111 ± 2.778 ฮฉ

c.

111 ± 5.55 ฮฉ

d.

111 ± 7.23 ฮฉ

Discuss
Answer: (c).111 ± 5.55 ฮฉ
Q237.
In a strain measuring device using a strain gauge, the output quantity is

a.

voltage

b.

resistance

c.

impedance

d.

either (a) or (b)

Discuss
Answer: (a).voltage
Q238.
A moving coil instrument has a resistance of 0.6 ฮฉ and full scale deflection at 0.1 A. To convert it into an ammeter of 0-15 A range, the resistance of shunt should be

a.

0.6 ฮฉ

b.

0.06 ฮฉ

c.

0.1 ฮฉ

d.

0.004 ฮฉ

Discuss
Answer: (d).0.004 ฮฉ
Q239.
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
Q240.
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
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