True/False
Indicate whether the
statement is true or false.
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1.
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The motor is connected to the power line regardless of which direction it
operates.
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2.
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Most reversing controllers only contain mechanical interlocks.
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3.
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Four methods of electrical interlocking are available.
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4.
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One of the methods of electrical interlocking is accomplished with the use of
double-acting push buttons.
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5.
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If R coil energizes, all R contacts change position.
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Completion
Complete each
statement.
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6.
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Magnetic reversing starters generally change T leads ____________________ and
____________________ to reverse the motor.
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Figure 9-3 
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7.
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The accompanying figure shows a vertical ____________________ starter with
overload relay.
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Figure 9-6 
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8.
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In the accompanying figure, the dashed lines drawn between the push buttons
indicate that they are ____________________ connected.
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9.
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Electrical interlocking can be accomplished by connecting the normally closed
____________________ contacts on one contactor in series with the coil of the other contactor.
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Figure 9-12 
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10.
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The accompanying figure shows the components needed to construct a(n)
____________________ control circuit.
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Short Answer
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11.
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How can the direction of rotation of any three phase motors be reversed?
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12.
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What does interlocking do?
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13.
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What would happen if both contactors were energized at the same time?
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14.
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How is mechanical interlocking accomplished?
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15.
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How are mechanical interlocks shown in a schematic diagram?
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