electrical systems part 1

What is the primary goal of understanding residential electrical systems?

• To learn how to repair electrical systems

• To identify and describe common electrical components

• To design new electrical systems

• To understand the history of electrical systems

Which of the following is NOT a component of residential electrical systems as described in the chapter?

• Service drop and entrance

• Electrical service box

• Solar panel installation

• Branch circuit wiring

What is the recommended footwear when inspecting electrical systems?

• Steel-toed boots

• Rubber-soled shoes

• Sneakers

• Sandals

Which formula represents the relationship between voltage, current, and resistance?

• P=V÷I=P÷I

• V=I+R

• V=I÷R

• R=V+I

What happens during a short circuit?

• The current flow becomes very small.

• The current flow becomes very large, causing a fuse to blow or a breaker to trip.

• The voltage increases significantly.

• The system operates normally.

Which material is considered the best conductor of electricity?

• Aluminum

• Copper

• Silver

• Gold

Why is a larger-sized aluminum wire needed compared to a smaller copper wire?

What materials are considered good insulators?

• Copper and aluminum

• Wood, rubber, ceramic, and most plastics

• Gold and silver

• Water and air

What happens when the filament inside a light bulb breaks?

• The bulb becomes brighter.

• The circuit remains closed.

• The light goes out because the circuit is opened.

• The bulb continues to glow.

How is current calculated?

• I=P·RI=P·R

• I=VRI=RV

• I=V+VI=V+R

• I=R·VI=R·V