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Residential Electrical Systems Quiz

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Questions and Answers

What is the primary purpose of grounding in residential electrical systems?

To protect against electrical shock (correct)

To decrease the resistance of the circuit

To increase the voltage in the circuit

To provide extra power to the circuits

In a residential electrical system, which color is typically used for grounding conductors?

Black

White

Red

Green or bare (correct)

Which type of wiring method is commonly preferred for residential electrical installations due to its flexibility and ease of installation?

Nonmetallic-sheathed cable (correct)

Metal-clad wiring

Knob-and-tube wiring

Conduit wiring

What is a characteristic of a circuit breaker in residential electrical systems?

It can be reset after tripping Signup and view all the answers

According to the National Electrical Code (NEC), what is the minimum height requirement for electrical outlets in residential buildings?

18 inches above the floor Signup and view all the answers

What is the purpose of a wire nut in residential electrical wiring?

To join two or more conductors together Signup and view all the answers

What is the function of a three-way switch in a residential electrical system?

To control a light fixture from two different locations Signup and view all the answers

Which of the following statements about AFCI (Arc-Fault Circuit Interrupter) devices is true?

They detect and mitigate the risk of electrical fires caused by arcing faults Signup and view all the answers

Which type of wiring method is commonly used for underground residential electrical installations?

Direct-buried cable Signup and view all the answers

What is the function of a surge protector in a residential electrical system?

To protect against sudden spikes in voltage Signup and view all the answers

Which of the following statements about knob-and-tube wiring is true?

It is considered unsafe and outdated due to its lack of grounding Signup and view all the answers

What is the main function of a light switch in a residential electrical system?

To open or close a lighting circuit Signup and view all the answers