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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 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 Signup and view all the answers

What happens when a fuse operates?

It has to be replaced Signup and view all the answers

What is the purpose of a switch?

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

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

Capacitive loads such as motors 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 Signup and view all the answers