Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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1.
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Electric motors rely on the principle of ______________ to convert electrical
power into mechanical power.
a. | capacitance | c. | resistance | b. | inductance | d. | gravity |
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2.
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The _____________ is the stationay winding of the electric motor.
a. | stator | c. | shaft | b. | rotor | d. | armature |
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3.
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Which of the following is an advantage of using an electric motor?
a. | Availability of electrical power. | d. | All of these | b. | Easily controlled
with electrical controls. | e. | None of these | c. | Variety of types to choose
from. |
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4.
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Which of the following is a disadvantage of using an electric motor?
a. | Short service life. | d. | All of these | b. | Can only produce rotary motion
output. | e. | None of
these | c. | Heating. |
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5.
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Which of the following is a category of electric motors?
a. | DC Motors | d. | All of these | b. | Universal Motors | e. | None of these | c. | AC
Motors |
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6.
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Which of the following is a rule of safe dress around electric motors?
a. | Wear Safety Glasses | d. | All of these | b. | Remove Loose Items | e. | None of these | c. | Tie Up Long
Hair |
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7.
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If a motor is too heavy for you to move by yourself, you should
_____________________.
a. | get someone to help you move it | c. | take the rest of the day
off | b. | forget about it | d. | move it anyway |
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8.
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Which of the following is not a component of a DC motor?
a. | Interpoles | c. | Bearings | b. | Armature | d. | Commutator |
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9.
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The primary purpose of interpoles is to ________________.
a. | increase motor speed | c. | make current flow in one direction | b. | help reduce sparking
betweeen the commutator and the brushes | d. | provide a connection between the power source and the
commutator |
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10.
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The ____________ provide a connection between the power source and the
commutator on a DC motor.
a. | armature | c. | brushes | b. | interpoles | d. | field windings |
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11.
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Which of the following is a wiring configuration for a DC motor?
a. | Series | d. | All of these | b. | Shunt | e. | None of these | c. | Compound |
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12.
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A DC ____________ motor is one that has the field windings connected in series
with the armature.
a. | compound | c. | shunt | b. | series | d. | servo |
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13.
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Which of the following is an application of a DC series motor?
a. | Locomotive | d. | All of these | b. | Crane | e. | None of these | c. | Hoist |
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14.
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The advantage of a series configured DC motor is that it can produce __________.
a. | constant speed | c. | high starting torque | b. | high speed | d. | variable speed |
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15.
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If a DC series motor is operated without a load, a condition called ___________
will occur.
a. | runaway | c. | hyper-speed | b. | overdrive | d. | self-destruction |
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16.
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Which of the following procedures will not reverse the direction of rotation on
a DC motor?
a. | Reverse the Field Winding Connections | d. | All of these | b. | Reverse the Armature
Connections | e. | None of
these | c. | Reverse the Power Supply Connections |
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Matching
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SEGMENT 1
a. | rotating | d. | universal | b. | electric power | e. | inductance | c. | stator | f. | serviced |
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17.
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Electric motors rely on the principle of ___________ to convert electrical
power into mechanical power.
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18.
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The three categories of electric motors are DC, AC, and __________.
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19.
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The easy access to ___________ often leads to the selection of an electric
motor for an application.
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20.
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Since a motor has moving parts, it must be __________ on a regular schedule in
order to ensure longer life and proper operation.
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21.
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The ___________ is the stationary part of an electric motor.
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22.
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The rotor is the __________ part of an electric motor.
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SEGMENT 2
Note: some answer may apply to
more than one question.
a. | loose | e. | damage | b. | heating | f. | heavy | c. | five | g. | clean | d. | disconnect or unplug | h. | coupled |
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23.
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There are ___________ rules of safe dress around motors.
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24.
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Always __________ a motor from electrical power before installing, coupling, or
servicing it.
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25.
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A motor must be properly ________ to the load it is driving.
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26.
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Dirt on the housing of a motor can cause excessive _________ which can reduce
the life of a motor.
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27.
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___________ clothing should not be worn when working around a motor.
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28.
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Get someone to help move or mount an electric motor if it is too __________ to
handle alone.
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29.
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An electric motor must be kept ______ and dry.
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30.
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Make sure that no _________ parts or tools are left around a motor when it is
in operation.
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31.
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Installing the wrong motor can cause ___________ to the motor and the load it
is coupled to.
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SEGMENT 3
Note: some answers may apply to
more than one question.
a. | interpoles | e. | series | b. | field windings | f. | crane | c. | high | g. | runaway | d. | torque | h. | magnetic fields |
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32.
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The _________ are the stator of the DC motor.
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33.
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The primary purpose of the ______ are to reduce sparking between the brushes
and the commutator.
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34.
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The rotation of an electric motor is created by the interaction of two
different ________.
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35.
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The three basic DC motor configurations are: __________, shunt, and compound.
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36.
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A DC series motor has the field windings connected in _________ with the
armature.
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37.
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_________ is the rotary force produced by a motor.
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38.
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The major advantage of a DC series motor is that it can produce ______ starting
torque.
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39.
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If no load is connected to a DC series motor when it is operated, a condition
known as _________ will occur.
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40.
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One application of DC series motor is a _________, which requires high starting
torque to lift items.
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SEGMENT 4
a. | power | e. | reversing the field windings | b. | will | f. | counterclockwise | c. | will not | g. | opposite | d. | field |
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41.
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To reverse the direction of rotation on a DC motor, either reverse the _______
connections or the armature connections, but not both.
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42.
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Reversing the ________ leads to a DC motor will not affect the direction of
rotation.
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43.
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The standard direction of rotation for all Amatrol-supplied motors is
__________.
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44.
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The shaft rotation direction can be determined by observing the motor from the
end ______ the shaft.
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45.
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Using both methods to reverse the direction of rotation of a DC motor at the
same time _________ (will/will not) change the direction of the rotation.
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46.
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The ___________ method will not work with all DC motor configurations.
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