Deck 11: Split-Phase Motors

Question 1

The direction of rotation of a ____ can be reversed by changing the start winding leads or the run winding leads, but not both.

A) split-phase motor
B) pneumatic motor
C) dual-voltage motor
D) hydraulic motor

Answer 1

split-phase motor

Question 2

Some dual-voltage motors will contain two start windings as well as two run windings.

Answer 2

True

Question 3

Capacitor-start induction-run motors are very similar to resistance-start induction-run motors.

Answer 3

True

Question 4

Some ____ are equipped with a separate starting capacitor to improve starting torque.

A) split-phase motors
B) permanent-split capacitor motors (PSC)
C) resistance-start induction-run motors
D) capacitor-start induction-run motors

Question 5

A rotating magnetic field can be produced with two separate phases.

Question 6

Many manufacturers of ____ will identify one terminal with an arrow, a painted dot, or by stamping a dash in the capacitor can.

A) oil-filled capacitors
B) hydraulic motors
C) dual-voltage capacitors
D) pneumatic motors

Question 7

The single-phase motors used in air conditioning systems are generally one of three types.

Question 8

The phase-angle difference between current in the run winding and current in the start winding of a resistance-start induction-run motor is generally ____ degrees.

A) 35 to 40
B) 45
C) 60 to70
D) 90

Question 9

The ____ has greatly increased in popularity for use in the air conditioning field over the past years.

A) dual-voltage motor
B) permanent-split capacitor motor
C) resistance-start induction-run motor
D) capacitor-start capacitor-run motor

Question 10

The contacts of the centrifugal switch are connected in parallel with the start winding.