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Electrical Systems Components Quiz

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Questions and Answers

What are bus bars?

Conductors with insulation

Small conductors in circular cross section

Large non-circular conductors found in main switchboards (correct)

Large circular conductors

Which of the following is a function of insulators?

Enclose wires and cables

Increase conductivity

Prevent the flow of electrons (correct)

Enhance electron flow

What do conduits primarily enclose?

Cabling accessories

Wires and cables (correct)

Bus bars

Insulated conductors

What type of outlet is intended for direct connection to a lighting fixture?

Lighting outlet Signup and view all the answers

In the context described, what do switches primarily do?

Make, break, or change conditions in electrical circuits Signup and view all the answers

What is the primary function of a service switch according to the text?

Disconnect all electric service in a building except emergency equipment Signup and view all the answers

What type of switches are used when it is desired to control lamps from two different points, such as in a stairwell?

Three-way switches Signup and view all the answers

Which protective device consists of an alloy link of wire with a low melting temperature inserted in the circuit?

Fuses Signup and view all the answers

What type of protective device provides ground fault protection and also functions as an ordinary circuit breaker?

Ground fault circuit interrupters Signup and view all the answers

Where are the protective devices housed in interior wiring installations?

Panelboards Signup and view all the answers

Which type of switches are used with two 3-wire switches to control lamps from three or more desired points?

Four-way switches Signup and view all the answers

What is the function of switchboards in interior wiring installations?

House protective devices and bus bars Signup and view all the answers

What is the purpose of a branch circuit?

To supply electricity to a single specific item Signup and view all the answers

Where do feeder circuits extend from and to?

From the main switchboard to the distribution panel boards Signup and view all the answers

What is the function of sub feeder circuits?

To distribute power from main feeders to smaller local panel boards Signup and view all the answers

What is the role of a distribution panel?

To distribute power to other panels or heavy power-consuming loads Signup and view all the answers

Where does low voltage alternating current below 50 volts come from in residential systems?

From a step-down transformer Signup and view all the answers

What is the point of delivery of electricity to a building by a public utility company called?

Service entrance Signup and view all the answers