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Electrical Engineering (EE) Exam  >  Electrical Engineering (EE) Test  >  GATE Mock Test Series 2027  >  Test: Instrument Transformer - 1 - Electrical Engineering (EE) MCQ

GATE Electrical Engineering (EE) Test: Instrument Transformer - 1 Free


MCQ Practice Test & Solutions: Test: Instrument Transformer - 1 (15 Questions)

You can prepare effectively for Electrical Engineering (EE) GATE Electrical Engineering (EE) Mock Test Series 2027 with this dedicated MCQ Practice Test (available with solutions) on the important topic of "Test: Instrument Transformer - 1". These 15 questions have been designed by the experts with the latest curriculum of Electrical Engineering (EE) 2026, to help you master the concept.

Test Highlights:

  • - Format: Multiple Choice Questions (MCQ)
  • - Duration: 45 minutes
  • - Number of Questions: 15

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Test: Instrument Transformer - 1 - Question 1
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What is the potential transformer?

Detailed Solution: Question 1

A transformer used to extend the range of an A.C. voltmeter is known as a potential transformer. A potential transformer is also abbreviated as P.T.

Test: Instrument Transformer - 1 - Question 2
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The primary winding of a C.T. has _________

Detailed Solution: Question 2

The primary winding of a C.T. has a very few number of turns. It is connected in series with the load circuit through which the primary current flows.

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Test: Instrument Transformer - 1 - Question 3
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Turns ration for a C.T. is _________

Detailed Solution: Question 3

The turns ratio for a C.T. is defined as the ratio of the number of turns in the secondary to the number of turns in the primary. It is given by the relation

Test: Instrument Transformer - 1 - Question 4
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The secondary winding of a P.T. has _________

Detailed Solution: Question 4

Secondary winding of a P.T. has a few number of turns. A low range voltmeter is connected in parallel with the secondary winding.

Test: Instrument Transformer - 1 - Question 5
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Instrument transformers provide _________

Detailed Solution: Question 5

In an instrument transformer, the low rated secondary windings provide electrical isolation from the high rated primary windings.

Test: Instrument Transformer - 1 - Question 6
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C.T. and P.T. are standardized at _________

Detailed Solution: Question 6

Current transformers are standardized at 5 A of secondary winding current, whereas Potential transformers are standardized at 110 V of secondary winding voltage.

Test: Instrument Transformer - 1 - Question 7
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A 110V voltmeter can measure a voltage of upto 110kV using a _________

Detailed Solution: Question 7

An 110000/110V potential transformer can be used for measuring a voltage of upto 110000V by making use of a voltmeter with 110V voltage reading.

Test: Instrument Transformer - 1 - Question 8
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How are instrument transformers different from shunts and multipliers?

Detailed Solution: Question 8

Instrument transformers can be used for extending the range of the A.C. instruments. In instrument transformers, readings are independent of the values of R, L, and C. But in the case of shunts and multipliers, the readings depend on the values of circuit constants.

Test: Instrument Transformer - 1 - Question 9
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What is the current transformer?

Detailed Solution: Question 9

A transformer used to extend the range of an A.C. ammeter is known as a current transformer. A current transformer is also abbreviated as C.T.

Test: Instrument Transformer - 1 - Question 10
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C.T. and P.T. are used for _________

Detailed Solution: Question 10

C.T. is basically used for the measurement of high currents. A P.T. is usually used for the measurement of high voltages. They are used with A.C. ammeters and voltmeters in order to extend their range.

Test: Instrument Transformer - 1 - Question 11
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The secondary winding of a C.T. has _________

Detailed Solution: Question 11

Secondary winding of a C.T. has a large number of turns. It is connected in series to an ammeter through which a small portion of the current flows through.

Test: Instrument Transformer - 1 - Question 12
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The primary winding of a P.T. has _________

Detailed Solution: Question 12

The primary winding of a P.T. has a very large number of turns. It is connected in parallel with the load whose voltage is to be measured.

Test: Instrument Transformer - 1 - Question 13
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A 5A ammeter can measure a current of upto 1000 A using a _________

Detailed Solution: Question 13

A 1000/5A current transformer can be used for measuring a current of upto 1000A by making use of an ammeter with 5A current reading.

Test: Instrument Transformer - 1 - Question 14
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How can the meter circuit be isolated from the power circuit?

Detailed Solution: Question 14

Leads of the secondary winding transformer are brought to the switch board thus separating them from high voltage windings. In this way, the meter circuit is isolated from the high voltage power circuit.

*Answer can only contain numeric values
Test: Instrument Transformer - 1 - Question 15
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The total impedance of the secondary winding, leads, and burden of a 5 A CT is 0.01 Ω. If the fault current is 20 times the rated primary current of the CT, the VA output of the CT is ________.


Detailed Solution: Question 15

Given that, impedance of secondary winding = 0.01 Ω
Rated current = 5 A
fault current = 20 times of rated current = 20 x 5 = 100 A
VA output = I2z = 1002 x 0.01 = 100 VA

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About this Electrical Engineering (EE) Practice Test

This test contains 15 MCQs on Instrument Transformer - 1 with detailed solutions for each question. It is part of the GATE Electrical Engineering (EE) Mock Test Series 2027 course on EduRev, designed to align with the current Electrical Engineering (EE) syllabus. Each solution explains not just the correct answer but also gives you an understanding of the topic — not just to attempt the question but also help you prepare for the exam with practice.

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