8
1-64. In a two-phase motor stator, what is the
angular displacement between the field
poles?
1. 0º
2. 90º
3.
180º
4.
360º
1-65. Adjacent phase windings of a 3-phase
motor stator are what total number of
degrees apart?
1. 30º
2. 90º
3.
120º
4.
180º
1-66. Which of the following types of motors
has a constant speed from no load to full
load?
1. Series
2. Synchronous
3. Induction
4. Universal
1-67. What type of ac motor is the simplest and
least expensive to manufacture?
1. Induction
2. Series
3. Synchronous
4. Two-phase
1-68. What term applies to the difference
between the speed of the rotating stator
field and the rotor speed?
1. Slip
2. Synchronous
3. Rotor error
4. Torque
1-69. The speed of the rotor of an induction
motor depends upon which of the
following factors?
1. The method of connecting the load
2. The dc voltage applied to the rotor
3. The torque requirements of the load
4. The current in the rotor
1-70. What type of ac motor is most widely
used?
1. Series
2. Universal
3. Synchronous
4. Single-phase induction
1-71. What type of ac motor uses a
combination of inductance and
capacitance to apply out-of-phase
currents to the start windings?
1. Three-phase
2. Series
3. Synchronous
4. Split-phase induction
1-72. Why are shaded-pole motors built only in
small sizes?
1. They have weak starting torque
2. They are expensive in large sizes
3. They are unidirectional
4. They require large starting current
