Deck 22: Installing Control Systems

Question 1

Figure 22-1
In the accompanying figure, what happens when the water level drops sufficiently?

Answer 1

When the water level drops sufficiently, FS2 contacts close and energize the coil of motor starter M. This causes all M contacts to change position. The M load contacts connect the pump motor to the power line and start the pump.

Question 2

When connecting a circuit, what are some actions that can be taken to aid in the identification of all the components?

Answer 2

When making connections, wire numbers should be placed on the wire at any point of termination. This greatly aids in troubleshooting the circuit. Each component should also be labeled with a tag to identify the component.

Question 3

Although connecting components to a terminal strip generally involves using a greater amount of wire, it can be the less expensive method when it is necessary to ____________________ the circuit.

Answer 3

troubleshoot

Question 4

Connecting components to a terminal strip is the more expensive method when it is necessary to troubleshoot the circuit.

Question 5

In the point-to-point method, the connections made inside the MCC are shown with solid lines.

Question 6

The point-to-point method generally results in a saving of wire.

Question 7

Figure 22-1
In the accompanying figure, what do float switches FS1 and FS2 do?

Question 8

Figure 22-1
In the accompanying figure, what happens when the water level begins to rise?

Question 9

One of the methods for installing control systems involves using a(n) ____________________ to terminate the different control components.

Question 10

Figure 22-1
In the above figure, the normally open contact of float FS1 is used to prevent the ____________________ from energizing unless the tank is full of water.

Question 11

Figure 22-1
In the accompanying figure, two float switches are necessary in this circuit because the tank is to be ____________________.

Question 12

Components such as float switches and pressure switches will generally be located on tanks.

Question 13

Why are wiring drawings sometimes misleading?

Question 14

When making connections, wire numbers should be placed on the wire at any point of termination.

Question 15

In the ____________________ method, components are connected from one point to another depending on the proximity of one component to another.