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.
- 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
Question 1: In a transformer on no-load, the input voltage?
Answers: leads the magnetizing current by 90°
- 5-A secondaries
- 15-A secondaries
- 1 : 2 ratio
- 5 : 1 ratio
Question 2: Current transformers for meters and relays usually have?
Answers: 5-A secondaries
- Distribution
- Transmission
- Substation
- Generator
Question 3: ln which of the following the highest rating transformer is likely to find application?
Answers: Generator
- dynamic induction
- mutual induction
- static induction
- self induction
Question 4: more than 100 or 1000?
Answers: mutual induction
- voltage
- current and voltage
- power
- current
Question 5: A transformer transforms?
Answers: power
- kVAR
- kW
- kWh
- kVA
Question 6: Transformer rating are usually expressed in terms of?
Answers: kVA
- primary is supplied rated kVA
- primary is supplied rated voltage
- primary is supplied full-load current
- primary is supplied current at reduced voltage
Question 7: During open circuit test of a transformer?
Answers: primary is supplied rated voltage
- frequency
- current
- voltage
- power
Question 8: A step-up transformer increases?
Answers: voltage
- voltage
- frequency
- power factor
- power
Question 9: A transformer is used to change the value of?
Answers: voltage
- Glass fibre
- Cellulose
- Asbestos
- Mica
Question 10: Which of the following insulating materials can withstand the highest temperature safely?
Answers: Mica
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