True/False
Indicate whether the
statement is true or false.
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1.
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Series field windings are marked F1 and F2 in the terminal connection
box.
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2.
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Shunt field windings exhibit a much higher resistance than the series field
windings.
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3.
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Frogleg wound armatures are most often used in small machines.
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4.
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Compound motors contain both a series and shunt field.
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5.
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Compound motors generally employ a field loss relay (FLR) that is intended to
disconnect the motor from the power line in the event that shunt field current should be interrupted
or drop below an acceptable level.
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Completion
Complete each
statement.
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6.
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The most common way of reversing the direction of rotation for a direct current
motor is to reverse the direction of the current flow though the ____________________.
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7.
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Shunt motors are often called ____________________ motors.
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8.
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The differential in speed from no load to full load is referred to as
____________________.
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9.
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When full line voltage is applied to both the armature and shunt field, the
motor is said to operate at ____________________ speed.
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10.
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____________________ is the term used to indicate the relative strength of the
series and shunt fields.
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Short Answer
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11.
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What are the three basic types of direct current motors?
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12.
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What are the three basic types of armature windings?
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13.
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On what principal do series motors operate?
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14.
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Series type motors have one undesirable characteristic. What is it?
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15.
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When compound motors are installed, what should they be tested for?
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