Quiz Questions

Question 1

What is the rating in watts of a single-phase heater if the voltage is 240 volts and the current is 8 amps?

a. 1920 watts.
b. 1600 watts.
c. 300 watts.
d. 1350 watts.

Answer 1

a. 1920 watts.

Question 2

What is the total resistance in this circuit?

a. 48 ohms.
b. 8 ohms.
c. 20 ohms.
d. 24 ohms.

Answer 2

d. 24 ohms.

Question 3

What is the current in a single-phase circuit with a voltage of 240 volts and a resistance of 6 ohms?

a. 1004 amps.
b. 1440 amps.
c. 24 amps.
d. 40 amps.

Answer 3

d. 40 amps.

Question 4

What is the voltage drop across each resistor in this circuit?

a. E1 = 8V, E2 = 16V, E3 = 48V, E4 = 48V.
b. E1 = 20V, E2 = 40V, E3 = 50V, E4 = 60V.
c. E1 = 12V, E2 = 24V, E3 = 36V, E4 = 48V.
d. E1 = 10V, E2 = 20V, E3 = 50V, E4 = 40V.

Question 5

What is the rating in amps for the primary of a 75 KVA 3-phase transformer when primary voltage is 480 volts 3-phase?

a. 156 amps.
b. 90 amps.
c. 108 amps.
d. 52 amps.

Answer 5

b. 90 amps.