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 30 of 51

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Q291.
It is required to measure temperature in the range of 1300-1520°C. The most suitable thermocouple is

a.

chromel constantan

b.

iron constantan

c.

chromel aluminium

d.

platinum-rhodium

Discuss
Answer: (d).platinum-rhodium
Q292.
Assertion (A): When frequencies of signals fed to X and Y plates of CRO are multiples of each other, Lissajous pattern is displayed on screen.

Reason (R): In a CRO, the vertical deflection is proportional to voltage applied to Y plates.

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: (b).Both A and R are true but R is not correct explanation of A
Q293.
In portable instruments, damping is provided by

a.

spring

b.

gravity

c.

eddy current

d.

either (a) or (c)

Discuss
Answer: (a).spring
Q294.
The sensitivity of electromagnetic digital flow meter can be increased by increasing

a.

circumferential width of rotor teeth

b.

radial depth of rotor teeth

c.

thickness of rotor teeth

d.

number of teeth

Discuss
Answer: (d).number of teeth
Q295.
The increase in intensity of trace in a CRO causes a change in

a.

beam current

b.

frequency of time base

c.

gain of Y amplifier

d.

accelerating voltage

Discuss
Answer: (a).beam current
Q296.
A diode peak reading VTVM and thermocouple meter are connected across output of an amplitude modulated circuit. In the absence of modulation both meters read 10 V. When sinusoidal AM is applied, VTVM reads 15V The reading of thermocouple meter will be

a.

10 V

b.

12.5 V

c.

14.1 V

d.

15 V

Discuss
Answer: (a).10 V
Q297.
The resistance of voltmeter affects the accuracy of measurement in loss of charge method.

a.

True

b.

False

c.

May be True or False

d.

can't say

Discuss
Answer: (a).True
Q298.
In a hot wire instrument, the deflection is proportional to

a.

peak value of ac current

b.

average value of ac current

c.

rms value of ac current

d.

either (a) or (b)

Discuss
Answer: (a).peak value of ac current
Q299.
A permanent magnet moving coil meter can be used as

a.

ac only

b.

dc only

c.

both ac and dc

d.

low frequency ac and dc

Discuss
Answer: (d).low frequency ac and dc
Q300.
If temperature increases by about 50°, the resistance of thermistor changes to

a.

half of its initial value

b.

twice of its initial value

c.

eight times of its initial value

d.

one eight of its initial value

Discuss
Answer: (d).one eight of its initial value
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