Deck 8: Multiple Pushbutton Stations

Question 1

There may be times when it is desirable to have more than one START-STOP push button station to control a motor.

Answer 1

True

Question 2

Figure 8-2


Based on the accompanying figure, what happens if either START button is pressed?

Answer 2

If either START button is pressed, a circuit will be completed to M coil. When M coil energizes all M contacts change position.

Question 3

Figure 8-1


Based on the accompanying figure, describe how the additional button is added to the circuit.

Answer 3

The second push button will be added to the control circuit by connecting it in series with the existing STOP push button.

Question 4

When a component is used to perform the function of stop in a control circuit, it will generally be a normally ____________________ component.

Question 5

When a component is used to perform the function of stop in a control circuit, it will generally be connected in ____________________ with the motor starter coil.

Question 6

Figure 8-4


What type of diagram is shown in the accompanying figure? What are the numbers which are shown called?

Question 7

The basic START-STOP push button control circuit discussed in Chapter 7 can be modified to include a second STOP and START push button.

Question 8

When M coil energizes, only the first M contact changes position.

Question 9

When a component is used to perform the function of start it is generally normally ____________________.

Question 10

Figure 8-5


What type of diagram is shown in the accompanying figure?

Question 11

Figure 8-1


The accompanying figure shows the addition of a(n) ____________________ button to the circuit.

Question 12

When a component is used to perform the function of start it is generally connected in ____________________ with the existing START button.

Question 13

Figure 8-2


Based on the accompanying figure, what happens to the three load contacts connected between the three phase power line and the motor after either START button is pressed?

Question 14

A wiring diagram cannot be developed from a schematic.

Question 15

Figure 8-3


The accompanying figure shows the components needed to produce a wiring diagram.