Question 1

It is not necessary to have a DC power plant and distribution system due to the wide use of solid-state .&#10;A)fuses&#10;B)capacitors&#10;C)rectifiers&#10;D)transformers

Accepted Answer

Solid-state rectifiers are widely used to convert AC to DC, eliminating the need for a DC power plant and distribution system. Fuses, capacitors, and transformers are all components that may be used in power systems, but they do not eliminate the need for a DC power plant and distribution system. Solid-state rectifiers convert AC power to DC power, making it unnecessary to have a DC power plant and distribution system. Fuses and capacitors are not relevant to power distribution, while transformers are still needed for voltage regulation and transformation.

Question 2

DC motors can be operated at a slow speed with a high torque.

Accepted Answer

DC motors have the ability to provide high torque even at low speeds, making them suitable for many industrial applications. DC motors are known to have high torque at low speeds, making them suitable for many industrial applications.

Question 3

A signal electronics module provides the overall drive control.

Accepted Answer

A signal electronics module is responsible for providing the overall control and coordination of various electronic signals in a system, including drive control. The signal electronics module is responsible for providing overall drive control in electronic devices.

Question 4

Rectified and controlled direct current is fed to the armature of the motor by controlled rectifiers.&#10;A)silicon&#10;B)aluminum&#10;C)ceramic&#10;D)phosphorus

Accepted Answer

Silicon controlled rectifiers (SCRs) are commonly used for rectifying and controlling direct current in electronic systems. Aluminum, ceramic, and phosphorus are not typically used for this purpose. Silicon is commonly used in controlled rectifiers for converting alternating current to direct current and controlling the voltage and current output. This makes it the best choice for feeding the armature of the motor with rectified and controlled direct current.

Question 5

When power is applied to the drive, each of the circuit boards is simultaneously checked by the microprocessor.

Accepted Answer

The answer of When power is applied to the drive,...

Question 6

Generally, DC motors are run at base speed or below.

Accepted Answer

DC motors are typically operated at or below their base speed because this is the range where they can maintain constant torque and perform efficiently.

Question 7

When operating the motor speed, the armature voltage is reduced accordingly.&#10;A)at base&#10;B)below base&#10;C)much above&#10;D)above base

Accepted Answer

When operating the motor below base speed, the armature voltage is reduced accordingly to control the speed of the motor. This is a common practice in variable speed drives where the voltage is adjusted to control the motor speed.

Question 8

With solid-state drives, sufficient space is allowed around power terminals to ensure working room and easy installation of .&#10;A)plug-in kits&#10;B)conduits&#10;C)resistors&#10;D)tachometers

Accepted Answer

Plug-in kits often need space around power terminals for easy installation, and solid-state drives typically provide this space. Conduits, resistors, and tachometers are not typically installed in or around solid-state drives. Plug-in kits are often used with solid-state drives, and sufficient space is provided around power terminals to ensure easy installation of such kits. Conduits, resistors, and tachometers are not typically associated with the installation of solid-state drives.

Question 9

Because there is no counter emf when the armature is at a standstill, and its resistance is very low, the current taken by the armature on startup will be .&#10;A)abnormally low&#10;B)low&#10;C)high&#10;D)abnormally high

Accepted Answer

The current taken by the armature on startup will be abnormally high due to the lack of counter emf and the low resistance of the armature.

Question 10

If it is necessary to operate the motor above base speed, the field voltage is increased and armature voltage is fully applied.

Accepted Answer

To operate a motor above its base speed, the field voltage is actually decreased (field weakening) while the armature voltage is maintained at its maximum or fully applied level. This allows for an increase in speed beyond the base speed.

Deck 47: Solid-State Adjustable Speed Control