NECA Electrical Systems & Equipment 1

Question 1

What is the main function of a transformer in electrical systems?

Accepted Answer

To increase or decrease voltage

Answer

To convert AC to DC

Answer

To protect against overcurrent

Answer

To store energy for later use

Question 2

What type of electrical system is typically used in residential buildings?

Accepted Answer

Split-phase system

Answer

Three-phase system

Answer

Single-phase system

Answer

AC/DC system

Question 3

What is the purpose of a circuit breaker in electrical systems?

Accepted Answer

To prevent electrical fires and damage

Answer

To increase current flow

Answer

To reduce voltage levels

Answer

To distribute power evenly

Question 4

Which component is typically used to control the flow of electricity in a circuit?

Accepted Answer

Switch

Answer

Conductor

Answer

Grounding electrode

Answer

Capacitor

Question 5

What is the function of an electrical panel in a building?

Accepted Answer

To distribute power and provide overload protection

Answer

To generate electricity

Answer

To store electrical energy

Answer

To filter electrical noise

Question 6

What is a common type of wire used in residential electrical installations?

Accepted Answer

Copper wire

Answer

Plastic wire

Answer

Rubber wire

Answer

Metallic wire

Question 7

What is the purpose of using a transformer in power systems?

Accepted Answer

To increase or decrease voltage

Answer

To store energy for future use

Answer

To filter electrical noise

Answer

To control current flow

Question 8

What is the function of a fuse in electrical systems?

Accepted Answer

To protect the circuit by breaking the connection when current is too high

Answer

To reduce the voltage

Answer

To store electrical energy

Answer

To regulate electrical flow

Question 9

What is the purpose of a grounding system in an electrical installation?

Accepted Answer

To provide a path for fault current to safely dissipate into the earth

Answer

To increase circuit resistance

Answer

To prevent electrical fires

Answer

To regulate the power supply