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 18 of 51

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Q171.
Two wattmeter method is suitable only for balanced loads.

a.

True

b.

False

c.

May be True or False

d.

can't say

Discuss
Answer: (b).False
Q172.
A rectifier voltmeter using bridge rectifier and PMMC meter is calibrated to read rms value of sine wave. A triangular wave is applied to it and it reads 6.82 V. The rms value of triangular wave is

a.

about 6.82 V

b.

about 7.1 V

c.

about 6.5 V

d.

about 10 V

Discuss
Answer: (b).about 7.1 V
Q173.
A radiation thermometer is suitable for temperatures

a.

below 500°C

b.

below 100°C

c.

above 500°C

d.

above 1400°C

Discuss
Answer: (d).above 1400°C
Q174.
A sinusoidal signal is measured by CRO. The scale is set at 4 mV/cm. If vertical distance between positive and negative peaks is 6 cm, the peak value of ac signal is

a.

6 mV

b.

12 mV

c.

24 mV

d.

3 mV

Discuss
Answer: (b).12 mV
Q175.
Wheatstone bridge is suitable for low resistances.

a.

True

b.

False

c.

May be True or False

d.

can't say

Discuss
Answer: (b).False
Q176.
To avoid creep in an energy meter

a.

two shading bands are put on shunt magnet

b.

two shading bands are put on series magnet

c.

two holes are cut in the disc on opposite sides of spindle

d.

the potential coil is made of very thin wire

Discuss
Answer: (c).two holes are cut in the disc on opposite sides of spindle
Q177.
A wire strain gauge has a gauge factor of 2, resistance of 125 ฮฉ and length 1 m. If length of wire changes by .005 m, change in resistance will be

a.

0.25 ฮฉ

b.

0.5 ฮฉ

c.

1.25 ฮฉ

d.

2.5 ฮฉ

Discuss
Answer: (c).1.25 ฮฉ
Q178.
Four voltmeters have following specifications. If accuracy is main consideration which is the best?

a.

100 V, 2 mA

b.

100 V, 100 mA

c.

100 V, 1 mA

d.

100 V, 0.1 mA

Discuss
Answer: (d).100 V, 0.1 mA
Q179.
The deflection of a DArsonval galvanometer is measured through a mirror and scale. The mirror is 1 m away from the light source. The mirror is mounted on, the moving system. If mirror rotates through 0.2 rad the displacement on the scale is

a.

0.2 m

b.

0.4 m

c.

0.1 m

d.

0.05 m

Discuss
Answer: (b).0.4 m
Q180.
Two ammeters having resistances of 0.5 ฮฉ and 0.25 ฮฉ and having full scale reading of 25 A each are connected in parallel. To ensure that neither of them goes beyond scale, the total current should not be more than

a.

50 A

b.

37.5 A

c.

25 A

d.

40 A

Discuss
Answer: (b).37.5 A
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