Extension of Instrument Ranges MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Extension of Instrument Ranges, a fundamental topic in the field of Electrical Measurement and Instrumentation. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Extension of Instrument Ranges 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 Extension of Instrument Ranges mcq questions that explore various aspects of Extension of Instrument Ranges problems. Each MCQ is crafted to challenge your understanding of Extension of Instrument Ranges principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Electrical Measurement and Instrumentation tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Extension of Instrument Ranges MCQs are your pathway to success in mastering this essential Electrical Measurement and Instrumentation topic.

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Extension of Instrument Ranges MCQs | Page 11 of 12

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Q101.
Two ammeters, one with a full-scale current of 1 mA and internal resistance of 100 โ„ฆ and other a full-scale current of 10 mA and internal resistance of 25 โ„ฆ are in parallel. What is the total current, these two meters can carry without the reading out of scale in any meter?

a.

1 mA

b.

10 mA

c.

11 mA

d.

5 mA

Discuss
Answer: (d).5 mA
Q102.
A meter has a full scale of 90° at a current of 1 A. This meter has a perfect square law response. What is the current when the deflection angle is 45°?

a.

0.5 A

b.

0.25 A

c.

0.707 A

d.

0.67 A

Discuss
Answer: (c).0.707 A
Q103.
The scale of a dynamometer type instrument marked in terms of RMS value would be__________

a.

Uniform throughout

b.

Non-uniform and crowded near the full scale

c.

Non-uniform and crowded at the beginning

d.

Non-uniform and crowded around mid-scale

Discuss
Answer: (c).Non-uniform and crowded at the beginning
Q104.
Moving Iron Instrument can be used as ____________

a.

An ammeter for measuring DC as well as AC

b.

For measuring DC current and voltages only

c.

An ammeter and a voltmeter for measuring DC as well as AC

d.

For measuring AC current and voltages only

Discuss
Answer: (c).An ammeter and a voltmeter for measuring DC as well as AC
Q105.
A 10 mA PMMC ammeter reads 4 mA in a circuit. Its bottom control spring snaps suddenly. The meter will now show __________

a.

10 mA

b.

8 mA

c.

2 mA

d.

Zero

Discuss
Answer: (d).Zero
Q106.
The standardization of AC potentiometer is done by ____________

a.

Using a DC standard source and dโ€™ Arsonval galvanometer

b.

Using AC standard sources and transfer instruments

c.

Using a standard AC voltage source

d.

Using a DC standard source and transfer instruments

Discuss
Answer: (d).Using a DC standard source and transfer instruments
Q107.
The inductance of a certain moving- iron ammeter is expressed as L = 10 + 3ฮธ โ€“ \(\frac{ฮธ^2}{4}\) ฮผH, where ฮธ is the deflection in radian from the zero position. The control spring torque is 25 × 10โปโถ Nm/rad. The meter carries a current of 5 A. What is the deflection?

a.

2.4

b.

2.0

c.

1.2

d.

1.0

Discuss
Answer: (c).1.2
Q108.
A current of โ€“ 8 + 6\(\sqrt{2}\) (sin (ฯ‰t + 30°)) A is passed through three meters. The respective readings (in ampere) will be?

a.

8, 6 and 10

b.

8, 6 and 8

c.

โ€“ 8, 10 and 10

d.

-8, 2 and 2

Discuss
Answer: (c).โ€“ 8, 10 and 10
Q109.
A rectifier type AC voltmeter consists of a series resistance R, an ideal full-wave rectifier bridge and a PMMC instrument. The internal resistance of the instrument is 100 โ„ฆ and a full- scale deflection is produced by a DC current of 1 mA. A voltage of 100 V (rms) is applied to the input terminals. The value of R required is?

a.

63.56 โ„ฆ

b.

89.83 โ„ฆ

c.

89.83 kโ„ฆ

d.

141.3 kโ„ฆ

Discuss
Answer: (c).89.83 kโ„ฆ
Q110.
A current of [2 + \(\sqrt{2}\) sin (314t + 30) + 2\(\sqrt{2}\) cos (952t +45)] is measured with a thermocouple type, 5A full scale, class 1 meter. The meter reading would lie in the range?

a.

5 A ± 1 %

b.

(2 + 3\(\sqrt{2}\)) A ± 1%

c.

3 A ± 1.7 %

d.

2 A ± 2.5 %

Discuss
Answer: (c).3 A ± 1.7 %
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