Preview Questions Electrician | Role Specific Skill

Question 1: What is the purpose of overcurrent protection devices such as breakers in electrical systems wiring?

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They enhance the system's performance by maintaining constant current

They limit voltage fluctuations within the system

They prevent excessive current from damaging the wiring or causing fire hazards

They focus solely on preventing short circuits

Question 2: What is the role of grounding in circuit design, and how should it be implemented?

Which action should you take?

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Grounding is optional and does not need to be considered

Grounding should be designed to ensure safety, with all metallic parts bonded to the ground and a dedicated ground conductor used for each circuit

Ignore grounding requirements if the system is properly insulated

Use the neutral conductor for grounding

Question 3: In residential installations, according to NEC 210.52, how far apart should receptacles be placed on a wall?

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No more than 8 feet

No more than 10 feet

No more than 12 feet

No more than 6 feet

Question 4: What is the maximum permissible voltage drop for a 120V circuit according to the NEC, to ensure efficient operation?

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2%

3%

10%

5%

Question 5: When installing a new electrical panel, what is the most important step to ensure the system is properly grounded?

Which action should you take?

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By connecting the panel directly to a power source without grounding

By relying on the metal conduit as the ground path

By connecting the panel to a neutral bus bar

By using a dedicated ground bus bar and ensuring the panel is connected to a grounding electrode

Question 6: In electric motor wiring, how does the start capacitor contribute to the motor's operation during the initial power-up phase?

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It reduces the amount of current required for normal operation

It isolates the motor from power surges

It provides an initial boost of power to help the motor start turning

It limits the voltage to prevent overloading the motor