Licensed Electrical Contractor Electrical Contractor Electrical Theory & Fundamentals 2

Question 1

A 240-volt circuit supplies a 5,000-watt electric heater. What is the current draw of the heater?

Accepted Answer

20.83 amps

Answer

25 amps

Answer

10.42 amps

Answer

41.67 amps

Question 2

What is the total resistance of three 30-ohm resistors connected in parallel?

Accepted Answer

10 ohms

Answer

90 ohms

Answer

30 ohms

Answer

15 ohms

Question 3

Which type of electrical current periodically reverses direction?

Accepted Answer

Alternating current (AC)

Answer

Direct current (DC)

Answer

Pulsating current

Answer

Static current

Question 4

In a series circuit with a 120-volt source and two equal resistors, what is the voltage drop across each resistor?

Accepted Answer

60 volts

Answer

120 volts

Answer

30 volts

Answer

240 volts

Question 5

What is the power factor of a purely resistive AC circuit?

Accepted Answer

1.0

Answer

0.8

Answer

0.5

Answer

0

Question 6

A conductor has a resistance of 4 ohms and carries 8 amps of current. How much power is dissipated as heat?

Accepted Answer

256 watts

Answer

32 watts

Answer

64 watts

Answer

512 watts