True/False
Indicate whether the
statement is true or false.
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Figure 24-4 
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1.
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In the circuit shown in the accompanying figure, the current sensor contacts are
normally open.
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2.
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Resistors connected in series with the motor limit the amount of in-rush
current.
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3.
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One way of determining when to shunt the resistors out of the circuit is by
sensing motor current.
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4.
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In an inductive circuit, the current must rise at an exponential rate.
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5.
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In a resistive circuit, the current will take some time to reach its full
Ohm’s law value.
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Completion
Complete each
statement.
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6.
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____________________ is accomplished by connecting resistors in series with the
motor during the starting period.
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Figure 24-1 
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7.
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The accompanying diagram uses ____________________ to shunt the resistors out of
the circuit after some period of time.
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8.
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Some control circuits sense ____________________ speed to determine when to
shunt the resistors out of the power line.
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9.
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Current ____________________ are used to sense the amount of motor
current.
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10.
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Reactors limit in-rush current with ____________________ instead of
resistance.
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Short Answer
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11.
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What are two of the most common methods of reducing the amount of starting
current?
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12.
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Name two conditions where it is not possible to start a motor
across-the-line.
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Figure 24-1
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13.
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In the accompanying figure, what happens right after the START button is
pressed?
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14.
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Why is time delay one of the most popular methods of determining when to connect
the motor directly to the power line?
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15.
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Some resistor and reactor starters use multiple steps of starting. How is this
accomplished?
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