IDA-101 Electrical System Control Devices and Appliances CRF

A(n) ___ uses a fuel and oxygen to produce DC electricity, with water and heat as by-products.

• engine generator

• photovoltaic system

• microhydroelectric turbine

• fuel cell

___ generation systems include engine generators, PV systems, wind turbines, fuel cells, or other relatively small-scale power systems.

• Centralized

• Distributed

• Lateral

• Overhead

___ are electric devices that use electromagnetism to change AC voltage or electrically isolate two circuits.

• Switchboards

• Transformers

• Panelboards

• Outlets

Conductor material can be ___, aluminum, or copper-clad aluminum.

• copper

• iron

• steel

• optical fiber

Grounding provides a direct path to the ___ for unwanted fault current to dissipate without causing harm to persons or equipment.

• fuses

• circuit breaker

• earth

• outlet

___ are caused by lightning strikes, unfiltered electrical equipment, contact bounce, arcing, and high-current loads being switched on and off.

• Frequency variation

• Power Factor

• Ghost voltages

• Transient voltages

___ is a measure of the flow of charged particles flowing in a circuit and is measured in amperes (A).

• Voltage

• Current

• Frequency

• Harmonics

___ is the power that is converted for use by devices into work, such as rotary motion by motors, light by lamps, and heat by heating elements.

• Power factor

• True power

• Apparent power

• Reactive power

A ___ allows an electrical system to be switched between two power sources.

• magnetic motor starter

• variable-frequency drive

• transfer switch

• power quality sensor

The ___ UPS design incorporates a transformer and an inverter/rectifier unit that are always connected to the output of the UPS.

• standby

• rotary

• delta-conversion on-line

• line-interactive