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Transformers

Authored by Matt G

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University

Used 15+ times

Transformers
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15 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

According to AS/NZS 3000, where a transformer secondary winding supplies equipment via a cable that has a current rating equal to or greater than the transformer secondary winding

A circuit-breaker must be used to protect the cable

Circuit protection is not required for the cable

A HRC fuse must be used to protect the cable

Either a circuit-breaker or a fuse must be used to protect the cable

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Laminated transformer cores are constructed using magnetic materials which primarily contain?

Iron

Copper

Stainless steel

Aluminium

3.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

Which two (2) of the following are the most relevant industry standards relating to transformers?

AS/NZS 3019: Electrical installations – periodic assessment

ISO 9001: Quality management

AS 60076: Power transformers

AS 2374.1.2: Minimum Energy Performance Standard requirements for distribution transformers

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the typical output rating of a potential transformer used for monitoring high voltage

110V

24V

230V

240V

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the safety risk if the common section of an auto-transformer winding is open circuited

The secondary voltage could become equal to the primary voltage

The secondary current might reach short circuit values

Primary voltage will increase to load value

Primaary current may equal secondary current

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the typical rated output current of a current transformer

1A or 3A

3A or 10A

5A or 10A

1A or 5A

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The secondary voltage of a transformer is produced by the principles of

Self-induction

Mutual induction

Current induction

Electrostatic induction

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