Deck 12: Sequence Control

Question 1

Sequence control can be achieved by several methods.

Answer 1

True

Question 2

Figure 12-4
In the circuit shown in the accompanying figure, motor #3 starts five seconds after motor #____________________ starts.

Answer 2

2
two

Question 3

Figure 12-11
Based on the accompanying figure, when the STOP button is pressed, all CR contacts open immediately.

Answer 3

True

Question 4

Figure 12-6
In the circuit shown in the figure above, what happens when the STOP button is pressed?

Question 5

How do automatic sequence control circuits which sense motor current work?

Question 6

Circuits that permit the automatic starting of motors in sequence are rare.

Question 7

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.

Question 8

What kinds of machines use sequence control? Give at least one example.

Question 9

____________________ forces motors to start or stop in a predetermined order.

Question 10

Most ladder diagrams show coils connected in parallel.

Question 11

Figure 12-2
In the circuit shown in the figure above, what prevents motor #2 from starting before motor #1?

Question 12

Some circuit requirements may demand that the motors turn off in sequence. What does such a circuit require?

Question 13

Figure 12-4
The circuit shown in the accompanying figure permits ____________________ motors to start in sequence.

Question 14

Figure 12-4
In the circuit shown in the accompanying figure, timer coil TR1 is connected in ____________________ with the 1M starter coil.

Question 15

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.