Transformer Choice Questions with Answers - Electrical Engineering

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TRANSFORMERS Multiple Choice Questions with Answers. The function of the conservator in a transformer. The thickness of laminations.

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    Question 1: In a transformer on no-load, the input voltage?

  • lags the magnetizing current by 90º
  • is in phase with magnetizing current
  • leads the magnetizing current by 90°
  • is always at 60º to the magnetizing current
  • Answers: leads the magnetizing current by 90°

    Question 2: Current transformers for meters and relays usually have?

  • 5-A secondaries
  • 15-A secondaries
  • 1 : 2 ratio
  • 5 : 1 ratio
  • Answers: 5-A secondaries

    Question 3: ln which of the following the highest rating transformer is likely to find application?

  • Distribution
  • Transmission
  • Substation
  • Generator
  • Answers: Generator

    Question 4: more than 100 or 1000?

  • dynamic induction
  • mutual induction
  • static induction
  • self induction
  • Answers: mutual induction

    Question 5: A transformer transforms?

  • voltage
  • current and voltage
  • power
  • current
  • Answers: power

    Question 6: Transformer rating are usually expressed in terms of?

  • kVAR
  • kW
  • kWh
  • kVA
  • Answers: kVA

    Question 7: During open circuit test of a transformer?

  • primary is supplied rated kVA
  • primary is supplied rated voltage
  • primary is supplied full-load current
  • primary is supplied current at reduced voltage
  • Answers: primary is supplied rated voltage

    Question 8: A step-up transformer increases?

  • frequency
  • current
  • voltage
  • power
  • Answers: voltage

    Question 9: A transformer is used to change the value of?

  • voltage
  • frequency
  • power factor
  • power
  • Answers: voltage

    Question 10: Which of the following insulating materials can withstand the highest temperature safely?

  • Glass fibre
  • Cellulose
  • Asbestos
  • Mica
  • Answers: Mica

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Total Questions Attempted: 0

Correct: 0 Wrong: 0

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