Preview Questions Electrician | Role Specific Skill

Question 1: What is the maximum conduit fill percentage for a single circuit in a non-metallic sheathed cable (NM) according to the NEC?

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50%

70%

60%

40%

Question 2: When installing an electrical panel, what is the required distance between the panel and any obstruction, such as a wall or shelving?

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At least 6 feet

At least 18 inches

At least 12 inches

At least 3 feet

Question 3: If a breaker is tripping repeatedly, what is the most likely cause?

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The circuit is underutilized and the breaker is unnecessary

The breaker is faulty and needs to be replaced

The wiring insulation is too thick

There is an overload or short circuit in the circuit

Question 4: What is the likely cause of a circuit not receiving power even though the breaker is on?

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The breaker is too old and needs to be replaced

The circuit has too many outlets

A broken wire or connection somewhere in the circuit

The circuit breaker is over-sized for the circuit

Question 5: When using twist-on wire connectors, what is the key factor in ensuring a secure electrical connection during installation?

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The wires should be twisted together tightly before securing them with the connector

The connector should be chosen based on the wire insulation material

The wires should only be connected using a single twist

The twist-on connector should be used for grounding only

Question 6: What is the required distance between a non-grounded conductor and a metal box when installing electrical wiring?

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1 inch

1/2 inch

1/4 inch

1.5 inches