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AC vs DC Electricity Basics

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Questions and Answers

What is a short circuit?

A connection of two or more conductors where the current flows through the connection (correct)
A type of electrical device that protects against overload or short circuit
A device that changes the flow of a circuit
A break in the connection of two conductors

What is the purpose of a circuit breaker?

To prevent corrosion in switches
To protect against overload or short circuit (correct)
To operate a circuit abnormally
To change the flow of a circuit

What is Watt's Law for troubleshooting electrical systems?

W = V + A x p.f
W = V x A x p.f (correct)
W = V - A x p.f
W = V / A x p.f

What is the power factor for resistive loads such as heaters or light bulbs?

Equal to 1.0 (B) Signup and view all the answers

What is the purpose of using non-corrosive materials for switch contacts?

To prevent corrosion from preventing the switch from working (A) Signup and view all the answers

What happens when a fuse operates?

It has to be replaced (B) Signup and view all the answers

What is the purpose of a switch?

To change the flow of a circuit (B) Signup and view all the answers

How do you determine the load on a circuit that trips a breaker?

By adding the wattage of each component and dividing by the circuit voltage (A) Signup and view all the answers

What type of loads have a power factor less than 1.0?

Capacitive loads such as motors (B) Signup and view all the answers

What is the function of a circuit breaker in terms of size?

It varies in size from small breakers to large switchgear (C) Signup and view all the answers