Question 1

There are two types of manual controllers, starters and regulators.

Accepted Answer

Manual controllers are generally categorized into two types - starters and regulators. Starters control the starting and stopping of motors or other equipment, while regulators adjust the output or flow of a process variable such as temperature or pressure. There are two types of manual controllers, starters and regulators.

Question 2

A normally closed micro-limit switch is used to sense when the manual controller is in a position such that all resistance is connected in the rotor circuit.

Accepted Answer

A normally closed micro-limit switch would be in its default closed position when not actuated, meaning it would not specifically be used to sense when a manual controller is in a specific position like having all resistance connected in the rotor circuit; instead, it would typically be used to indicate a default or safe position, opening the circuit when actuated away from this position.

Question 3

The phrase &#34;wound rotor&#34; describes the construction of the rotor.

Accepted Answer

The phrase "wound rotor" refers to a type of rotor construction in which the rotor windings are made up of insulated wire that is wound around a laminated iron core. The phrase "wound rotor" refers to a type of rotor construction where the rotor windings are connected to slip rings instead of being directly attached to the power source. This allows for external resistance to be added, which can control the speed and torque of the motor.

Question 4

When the rotor is installed in a motor, three leads are brought out from the rotor winding to solid conducting .&#10;A)collector rings&#10;B)end rings&#10;C)slip rings&#10;D)bearings

Accepted Answer

The three leads from the rotor winding are connected to slip rings which are solid conducting rings that are mounted on the rotor shaft. The slip rings make contact with brushes that are stationary and connected to external circuitry. As the rotor turns, the brushes maintain contact with the slip rings, transferring power to and from the rotor winding. Slip rings are used to provide the electrical connection to the rotor winding while allowing the rotor to rotate without tangling the wires. Collector rings and end rings are typically used in DC motors, while bearings are used to support the rotor shaft and allow it to rotate smoothly. Therefore, the best choice is C) slip rings.

Question 5

The stator windings for the three major types of three-phase motors - squirrel cage, wound rotor, and - are basically the same.&#10;A)synchronous&#10;B)stator&#10;C)bearing end brackets&#10;D)reversible

Accepted Answer

The stator windings for squirrel cage, wound rotor, and synchronous three-phase motors are essentially the same. The key difference between these motors lies in their rotors. The stator windings for the three major types of three-phase motors - squirrel cage, wound rotor, and synchronous - are basically the same.

Question 6

When starting wound rotor motors, the operating lever is moved to to insert the full value of resistance in the secondary circuit.&#10;A)the first running position&#10;B)the middle running position&#10;C)the last running position&#10;D)the regular running position

Accepted Answer

When starting wound rotor motors, the operating lever is moved to the first running position to insert the full value of resistance in the secondary circuit. This allows the motor to start with reduced current and torque, which protects the motor and connected equipment from the high inrush current that would occur without the resistance. Once the motor is up to speed, the operating lever can be gradually moved to reduce the resistance and increase the motor's torque and speed.

Question 7

The induced current remains constant in the wound rotor motor.

Accepted Answer

The induced current in the wound rotor motor varies based on the load and resistance of the rotor circuit. The induced current in the wound rotor motor varies according to the load and the speed of the motor.

Question 8

Drum controllers may be used in place of faceplate starters.

Accepted Answer

Drum controllers can be used to control motors in place of faceplate starters. Drum controllers can be used to control and start motors, so they can replace faceplate starters in certain applications.

Question 9

The drum controller of a motor is separate from the resistors and is used for .&#10;A)providing low-voltage protection&#10;B)providing low-voltage release&#10;C)controlling the primary magnetic switch&#10;D)switching or controlling external resistors

Accepted Answer

The drum controller is used for switching or controlling external resistors in a motor control circuit. It helps in controlling the current flow and facilitating the starting and stopping of the motor. It is not used for low-voltage protection or release, nor does it control the primary magnetic switch. The drum controller is used for switching or controlling external resistors. It is not used for providing low-voltage protection, low-voltage release or controlling the primary magnetic switch.

Question 10

Sliding contact wound rotor starters and regulators control only the circuit of the motor.&#10;A)basic&#10;B)secondary&#10;C)primary&#10;D)interlocking

Accepted Answer

Sliding contact wound rotor starters and regulators are used to control the secondary circuit of the motor. This allows for the adjustment of the motor's torque and speed characteristics by varying the resistance in the rotor circuit.

Deck 34: Wound Rotor Motors and Manual Speed Control