UA Local 467 Section 15.2 Quizizz

Electricity is the energy released by the flow of ___ in a conductor (wire).

• neutrons

• protons

• electrons

• current

___ is the amount of electrons flowing through a conductor.

• Resistance

• Voltage

• Current

• Electricity

___ is a switch that isolates electrical circuits from the voltage source to allow safe access for maintenance or repair.

• relay

• DPDT switch

• pressure switch

• disconnect

A hygroscopic element is a device that changes its characteristics as ___ changes.

• humidity

• temperature

• current

• voltage

A(n) ___ control system is a control system that uses electricity (24 VAC or higher) to operate devices in the system.

• mechanical

• electrical

• high-limit

• packaged unit

An insulator is a material that has a high ___ and resists the flow of electrons.

• resistance

• voltage

• current

• electrical charge

___ is the positive (+) or negative (−) state of an object.

• Voltage

• Resistance

• Current

• Polarity

Control systems at ___ VAC are the most common line-voltage control systems.

• 95

• 105

• 120

• 160

A ___ is an electrically operated switch that includes motor overload protection.

• contactor

• motor starter

• circuit breaker

• relay

___ is the international unit of frequency equal to one cycle per second.