Electricity level 3 section 9 questions and
answers Graded A+
Which of the following is true concerning the starting current of an induction motor at the
moment the circuit is energized? - ✅✅The current rises rapidly.
To calculate the maximum safe load that a motor may be expected to carry continuously at its
rated voltage and frequency, the service factor is multiplied by the - ✅✅horsepower rating
The requirements for torque motors, shaded-pole motors, permanent split capacitor motors,
and AC adjustable-voltage motors can be found in - ✅✅NEC section 430
If a motor has a current draw of 20A at 240V, what will the amperage be if 480V is applied? -
✅✅10A
Which of the following lists the full-load currents for three-phase motors with a known winding
type, horsepower, and voltage? - ✅✅NEC Table 430.250
If a 480V, three-phase motor control center feeds a 50hp motor (65A), a 40hp motor (52A), and
a 10hp motor (14A), the minimum feedee ampacity is - ✅✅147.25A
If the total resistance of two motor windings connected in parallel is 20ohms and 240V is
applied to the circuit, how much current will flow? - ✅✅12A
The maximum recommended size of a dual-element, time-delay fuse for a 50hp, 460V, three-
phase motor rated at 65 FLA is - ✅✅125A
One of the three factors that will cause a three-phase motor's magnetic field to rotate is that
the - ✅✅stator windings around the inside of the motor are arranged in a specific manner to
induce rotation
answers Graded A+
Which of the following is true concerning the starting current of an induction motor at the
moment the circuit is energized? - ✅✅The current rises rapidly.
To calculate the maximum safe load that a motor may be expected to carry continuously at its
rated voltage and frequency, the service factor is multiplied by the - ✅✅horsepower rating
The requirements for torque motors, shaded-pole motors, permanent split capacitor motors,
and AC adjustable-voltage motors can be found in - ✅✅NEC section 430
If a motor has a current draw of 20A at 240V, what will the amperage be if 480V is applied? -
✅✅10A
Which of the following lists the full-load currents for three-phase motors with a known winding
type, horsepower, and voltage? - ✅✅NEC Table 430.250
If a 480V, three-phase motor control center feeds a 50hp motor (65A), a 40hp motor (52A), and
a 10hp motor (14A), the minimum feedee ampacity is - ✅✅147.25A
If the total resistance of two motor windings connected in parallel is 20ohms and 240V is
applied to the circuit, how much current will flow? - ✅✅12A
The maximum recommended size of a dual-element, time-delay fuse for a 50hp, 460V, three-
phase motor rated at 65 FLA is - ✅✅125A
One of the three factors that will cause a three-phase motor's magnetic field to rotate is that
the - ✅✅stator windings around the inside of the motor are arranged in a specific manner to
induce rotation
