Question 1

The operation of each additional push-button control station is different from that of the single push-button control in the basic three-wire circuit.

Accepted Answer

Each additional push-button control station in a basic three-wire circuit operates in the same manner as the single push-button control, allowing for start and stop functions to be controlled from multiple locations.

Question 2

The motor may be started or stopped from a number of separate stations by connecting all start buttons in parallel and stop buttons in series.&#10;A)two&#10;B)three&#10;C)some&#10;D)all

Accepted Answer

All stop buttons are connected in series to ensure that the motor stops when any one of the stop buttons is pressed, providing a fail-safe mechanism for stopping the motor from any station.

Question 3

Pressing any stop button de-energizes the coil.

Accepted Answer

When a stop button is pressed, it interrupts the control circuit and the coil is de-energized. Pressing any stop button will interrupt the current flow to the coil, de-energizing it and stopping the associated machinery or process.

Question 4

The conventional three-wire, push-button control circuit may be extended by the addition of one or more push-button control stations.

Accepted Answer

This is true. Additional push-button control stations can be added to the conventional three-wire control circuit to provide control from multiple locations. The conventional three-wire, push-button control circuit can be extended by adding more push-button control stations, allowing for remote control of a device or system.

Question 5

Multiple push-button stations are used to control conveyor motors .&#10;A)on industrial refrigerating installations&#10;B)on large shipping and receiving freight docks&#10;C)on FCC towers in oil refineries&#10;D)on vacuum towers in oil refineries

Accepted Answer

Multiple push-button stations are commonly used on large shipping and receiving freight docks to control conveyor motors, allowing for easy and efficient movement of goods. They may also be used in other industrial settings, such as manufacturing facilities or warehouses. However, options A, C, and D are less likely scenarios for the use of multiple push-button stations to control conveyor motors. Multiple push-button stations are commonly used in large shipping and receiving freight docks to control conveyor motors. They allow multiple operators to control the conveyor system from different locations for efficient material handling.

Question 6

An electrician in the field must connect a circuit using a line diagram.

Accepted Answer

The answer of An electrician in the field must connect...

Question 7

When a motor must be started and stopped from more than one location, .&#10;A)any number of start and stop buttons may be connected&#10;B)the number of start and stop buttons that may be connected varies with its size&#10;C)the number of start and stop buttons that may be connected varies with its rating&#10;D)two to four start and stop buttons may be connected

Accepted Answer

Any number of start and stop buttons can be connected in parallel for a motor control circuit, allowing the motor to be started or stopped from multiple locations. This does not depend on the motor's size or rating, nor is there a specific limit to the number of buttons that can be connected.

Question 8

When components are used to perform the function of stop, they are generally wired with the motor starter coil.&#10;A)normally open and connected in series&#10;B)normally closed and connected in series&#10;C)normally closed and connected in parallel&#10;D)normally open and connected in parallel

Accepted Answer

When components are used to perform the function of stop, they are generally wired as normally closed and connected in series with the motor starter coil. This means that the circuit is normally closed to allow motor operation, but when the stop button is pressed, the circuit is opened and the motor stops. This is the most common and safe wiring configuration for a stop function. When components are used for a stop function, they need to be normally closed to allow the circuit to be closed when stop is required. The components must also be wired in series with the motor starter coil since a break in any of the components will break the circuit and stop the motor. Therefore, the correct choice is normally closed and connected in series, which is option B.

Deck 20: Multiple Push-Button Stations