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Multiple Choice Quiz
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1
The universal motor is designed to operate only from an ac power source.
A)True
B)False
2
The nameplate on a motor generally contains the information needed to determine whether or not a motor is operating within specifications.
A)True
B)False
3
At a higher-than-rated voltage, a motor tends to run with little or no noise.
A)True
B)False
4
That which produces rotation, or tends to produce rotation, is known as commutation.
A)True
B)False
5
Totally enclosed nonventilated motors have only one external fan to force air over the external surface of the enclosure.
A)True
B)False
6
The physical size of a motor is indicated by a
A)motor number
B)motor letter
C)frame number
D)frame letter
7
In a motor, a group of coils of wire all wound in the same direction so that the magnetic field of each coil is aiding all other coils is called a
A)rotor
B)stator
C)pole
D)squirrel cage
8
What is the synchronous speed of a four-pole motor operating from a 220-V 60 Hz source?
A)1000 r/min
B)1800 r/min
C)880 r/min
D)13200 r/min
9
Which of the following is not a disadvantage of a shaded-pole motor?
A)inefficient
B)low PF
C)expensive to construct
D)very weak starting torque
10
A motor designed to operate from either an ac or a dc power source is a(n)
A)single-phase motor
B)synchronous motor
C)universal motor
D)squirrel-cage motor







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