Agriculture Mechanics Technology I Final Exam Review

Electricity is ____.

• a negatively charged wire

• a buildup of charged particles

• energy that consists of charged particles, such as electrons

• a system for moving electrons long distances

Watts are the ____.

• flow of electrons

• pressure at which electrons are pushed

• work that is performed by electrical energy

• resistance to moving electrons

The main difference between a fuse and a circuit breaker is ____.

• fuses are more expensive

• the fuse can only protect loads up to 20 amps

• the circuit breaker is only functional when excess heat builds up

• the circuit breaker is reusable

Of the following, the best method for avoiding electrical shock is ____.

• keeping electricity contained in its predictable path

• keeping the circuit clean and charged

• always wearing rubber gloves and steel-toe shoes

• to not use power tools and appliances

A(n) ____ is any device that is used to interrupt the flow of electrons in a circuit, stopping or redirecting the flow of electricity.

• voltage detector

• conductor

• insulator

• switch

The number of cycles per second is an AC signal’s frequency, which is measured in units called ____.

• watts

• volts

• hertz

• amps

In the United States, electricity is uniformly supplied at ____ Hz.

• 6

• 60

• 600

• 6000

The point in the electrical system when ownership (and responsibility for use and control) changes from the power company to the local owner is the ____.

• breaker box

• service entrance

• distribution panel

• service disconnect box

A safely energized circuit is all of the following, except ____.

• able to move current through a load

• able to stop current flow with a breaker

• safely moving current from hot wire to load and back to source

• moving current to ground

Taps are ____.

• connections to a device

• wire-to-wire connections to form a branch

• wire-to-wire connections to increase the length of wire

• always made with a small gap so current can jump across