True/False
Indicate whether the
statement is true or false.
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1.
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Sequence control can be achieved by several methods.
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2.
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Circuits that permit the automatic starting of motors in sequence are
rare.
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3.
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Most ladder diagrams show coils connected in parallel.
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4.
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In a circuit in which three motors turn off in sequence, an overload on any one
motor will not have an effect on the other motors.
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Figure 12-11 
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5.
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Based on the accompanying figure, when the STOP button is pressed, all CR
contacts open immediately.
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Completion
Complete each
statement.
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6.
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____________________ forces motors to start or stop in a predetermined
order.
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Figure 12-4 
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7.
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The circuit shown in the accompanying figure permits ____________________ motors
to start in sequence.
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8.
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In the circuit shown in the accompanying figure, motor #3 starts five seconds
after motor #____________________ starts.
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9.
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In the circuit shown in the accompanying figure, timer coil TR1 is connected in
____________________ with the 1M starter coil.
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10.
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The addition of two ____________________ make it possible to start motors in
sequence from #1 to #3 with a time delay between the starting of each motor as well as stopping the
motors in sequence from #3 to #1 with a time delay between the stopping of each motor.
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Short Answer
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11.
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What kinds of machines use sequence control? Give at least one example.
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12.
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How do automatic sequence control circuits which sense motor current
work?
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Figure 12-2 
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13.
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In the circuit shown in the figure above, what prevents motor #2 from starting
before motor #1?
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14.
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Some circuit requirements may demand that the motors turn off in sequence. What
does such a circuit require?
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Figure 12-6 
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15.
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In the circuit shown in the figure above, what happens when the STOP button is
pressed?
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