Electrical/Mechanical

The term impedance is used in transformers and other devices in AC system is a combination of _____

• resistance and reactance

• inductance and capacitance

• resistivity and conductivity

• none of these

It characterizes short circuit

• high resistance, high current

• low resistance, low current

• low resistance, high current

• high resistance, low current

A circuit type where components are electrically connected end-to-end

• series circuit

• parallel circuit

• series-parallel circuit

• none of these

Alternating current is characterized as having _____

• positive and negative polarity

• average value is zero

• has frequency

• all of these

The basic elements of electric circuit are the following except

• source

• switch

• conducting path

• electrical load

The trade name for an insulated conductor with type letter THHN is _____

• moisture-resistant thermoplastic

• thermoplastic

• heat-resistance thermoplastic

• none of these

Which of the following metallic materials is considered as the best conductor of electricity?

• copper

• aluminum

• iron

• bronze

A unit or assembly units or sections and associated fittings forming a rigid structural system used to support cables

• cable bus

• cable tray

• busway

• wireway

Fusible material in a fuse may be made of any of the following except _____

• lead

• silver

• iron

• tin

A type of switch used for transferring one or more load conductor connections from one power source to another

• transfer switch

• isolating switch

• general use switch

• general snap switch