A _______ fire extinguisher should be used on an electrical fire.

• Class A

• Class B

• Class C

• Class D

A Safety Data Sheet (SDS) provides information about fires aid measures, stability and reactivity, and

• installation requirements

• handling and storage

• warranty details

• material costs

What safety practice is used to prevent equipment from being energized?

• pump

• lockout/tagout

• remove fuse

• off switch

Overload protection is designed to protect the ________ by disconnecting it from the power source when an overload is sensed.

• electric motor

• bearings

• contacts

• conductors

A motor ________ is a motor controller that includes overload protection.

• controller

• starter

• contactor

• drive

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-3

An ohmmeter is used to measure

• current

• voltage

• resistance

• power

Which of the following is used to measure a current?

• ohmmeter

• ammeter

• wattmeter

• voltmeter

In an AC circuit, if resistance remains the same and voltage is doubled, then current

• reduces by half

• remains the same

• is doubled

• increases fourfold

If the voltage source supplies 260 volts and the resistance measures 5 ohms, the current is

• 28 amps

• 36 amps

• 48 amps

• 52 amps

In the DC circuit below, if R5 burns open, the total current

• increases

• decreases

• remains the same

• goes to zero