Electrical Systems Quiz 1

What is the minimum circuit operating voltage recommended by the NEC if a branch circuit operates at 240 volts AC with a 3% voltage drop?

• 210 volts

• 220 volts

• 232 volts

• 240 volts

What is equivalent to the volt amperes in an AC circuit?

• True power

• Capacitance power

• Apparent power

• Square power

What is the voltage drop for a #8 (16.510 cmil) copper wire at 120V, 215 feet one way, with a load of 39amps?

• 10.5 volts

• 13.1 volts

• 14.2 volts

• 7.5 volts

If a voltage source of a circuit provides 240 volts and there are 5 ohms of resistance, how much current is in the circuit?

• 20 amps

• 25 amps

• 48 amps

• 35 amps

What should be done to change the rotation of a 3 phase motor?

• Swap any T-lead

• Swap any two T leads

• Swap all three T leads

• Swap the red and yellow leads

What instrument is used to measure current?

• Ohmeter

• Wattmeter

• Ammeter

• Voltmeter

Which plan indicates the location of structures and equipment on a property?

• Floor

• Section view

• Detail drawing

• Site

Generally, the most ideal conductor is made of:

• Bronze

• Brass

• Aluminum

• Copper

What is the standard size system used in the United States?

• AWG

• UL

• ANSI

• NEC

What is insulating tape?

• Adhesive tape that has been manufactured to keep the conductors warm

• Non-adhesive tape used to cover devices

• Non-Conductive adhesive tape

• Non-adhesive tape used as phase tape