Deck 29: Single Phase Motors

Question 1

How can the direction of rotation of a split phase motor be reversed?

Answer 1

The direction of rotation of a split phase motor can be reversed by changing the run or start windings in relation to each other.

Question 2

In order to produce a rotating magnetic field, there must be more than one phase.

Answer 2

True

Question 3

Shaded pole motors are used in applications where it is necessary to reverse the direction of rotation of the motor.

Answer 3

False

Question 4

In order to split one phase into two, split phase motors contain two separate windings. What are they and how are they connected to each other?

Question 5

The hot-wire relay functions as both a starting relay and an overload relay.

Question 6

What does it mean if a thermistor has a positive coefficient of resistance?

Question 7

What are the three types of split phase motors?

Question 8

Split phase motors operate on the principle of a rotating ____________________.

Question 9

What are the two factors which determine the speed of a rotating magnetic field?

Question 10

Multiple speeds are obtained by connecting inductance in parallel with the main run winding.

Question 11

Motors that change speed by changing the number of stator poles are called ____________________ motors.

Question 12

The solid-state relay uses a solid-state component called a(n) ____________________.

Question 13

In split phase motors, the centrifugal switch is operated by springloaded ____________________.

Question 14

Centrifugal switches can be used on all types of split phase motors.

Question 15

The potential starting relay is used with the capacitor start capacitor run or ____________________ capacitor motor.