Question 1

When jogging with a control relay on a reversing starter, while the relay is energized, .&#10;A)the reversing jogger becomes operational&#10;B)both the forward and the reverse starter will be de-energized&#10;C)both the forward and the reverse starter will also remain energized&#10;D)either the forward or the reverse starter will also remain energized

Accepted Answer

When jogging with a control relay on a reversing starter, while the relay is energized, either the forward or the reverse starter will also remain energized. This allows for controlled, short-duration movements in either direction without fully engaging the motor for continuous operation.

Question 2

Jogging can be implemented using a , two-position selector switch.&#10;A)standard-duty&#10;B)heavy-duty&#10;C)light-duty&#10;D)special-purpose

Accepted Answer

A standard-duty two-position selector switch is sufficient for jogging, as it requires minimal power and is not a high-stress application. Jogging is a low-power operation that doesn't require heavy-duty equipment. Therefore, a standard-duty, two-position selector switch will suffice for this application. Heavy-duty switches would be more suitable for high-power operations, while light-duty switches are generally used for less demanding applications. Special-purpose switches would be unnecessary and may even be overkill for jogging.

Question 3

Neither jogging nor inching prevent a holding circuit.

Accepted Answer

Jogging and inching are control methods used in electrical circuits, but they do not prevent a holding circuit; instead, they are techniques to momentarily or briefly activate a motor or circuit without engaging the full holding circuit mechanism.

Question 4

A selector push button can be used to obtain jogging.

Accepted Answer

A selector push button is often used to activate jogging mode in machines, allowing for precise movement and control. A selector push button can be used to initiate jogging in a motor or other industrial equipment.

Question 5

The term inching is often used when referring to across-the-line starters.

Accepted Answer

The term "inching" refers to a method of obtaining a very low speed operation of a motor for short periods to facilitate positioning or adjustment operations, not specifically to across-the-line starters. Across-the-line starters directly connect the motor to the power supply, causing it to start at full speed.

Question 6

When a jogging circuit is used, the machine operator has control of the motor drive.&#10;A)close to full&#10;B)little&#10;C)instantaneous&#10;D)no

Accepted Answer

Jogging is a control feature used in motor operations, allowing the operator to momentarily energize the motor to move at a slow speed, providing the operator with instantaneous control over the start and stop of the motor for precise positioning tasks.

Question 7

Jogging is defined by as &#34;the quickly repeated closure of a circuit to start a motor from rest for the purpose of accomplishing small movements of the driven machine.&#34;&#10;A)ASA&#10;B)UL&#10;C)IEEE&#10;D)NEMA

Accepted Answer

"Jogging" is a technical term used in the industrial sector to describe a short, intermittent burst of power to start a machine in motion. The National Electrical Manufacturers Association (NEMA) provides the definition of jogging in their standards, making option D the correct choice. The other options are not associated with this definition.

Question 8

The addition of a control relay to a jogging circuit provides even greater control of the motor drive than the use of a jogging circuit alone.

Accepted Answer

The addition of a control relay allows the motor drive to be turned on and off remotely, providing additional control to the jogging circuit. A control relay can provide additional functionality to a jogging circuit, such as the ability to stop the motor or change its direction. This enhances the level of control over the motor, making it more precise and adaptable to various situations.

Question 9

The use of a selector switch in the control circuit to obtain jogging requires a three-element control station with start and stop controls and a switch.&#10;A)temperature&#10;B)selector&#10;C)pressure&#10;D)limit

Accepted Answer

The question mentions the use of a selector switch to obtain jogging, therefore the correct answer is B, selector switch. The other options (temperature, pressure, limit) are not related to the function of a selector switch in the control circuit. The question specifically mentions the use of a selector switch in the control circuit to obtain jogging. Therefore, the best choice would be a selector switch as the missing element in the three-element control station, making the answer B) selector.

Question 10

When a jogging circuit is used, the starter can be energized only as long as the jog button is depressed.

Accepted Answer

This statement is true. When using a jogging circuit, the starter motor will only be energized as long as the jog button is being held down. This allows for precise control over the motor's movement, rather than continuously running or stopping it. When the jog button is depressed, the starter motor gets energized but as soon as the button is released, it gets de-energized. So, the statement is true.

Deck 23: Jogging Inching Control Circuits