ET - M9 - Industrial Motor Control

What is industrial motor control?

• Ability to control a motor

• Has the capacity to energize motor

• Control motor speed

• All of the Above

Which of the following is a primary function of industrial motor control?

• To increase motor size

• To reduce motor efficiency

• To protect motors from damage

• To decrease production output

What is the main purpose of a motor starter?

• To provide overload protection only

• To connect the motor directly to the power supply

• To start and stop the motor, and provide overload protection

• To measure motor speed

Which type of motor starter connects the motor directly to the full line voltage?

• Reduced voltage starter

• Soft starter

• Direct Online (DOL) starter

• Variable Frequency Drive (VFD)

What is the primary advantage of using a Direct Online (DOL) starter?

• Smooth acceleration

• Reduced starting current

• Simplicity and low cost

• Precise speed control

Which component is essential for providing overload protection in a motor control circuit?

• Contactor

• Control transformer

• Overload relay

• Pushbutton

What is the function of a contactor in a motor control system?

• To provide overcurrent protection

• To manually start and stop the motor

• To switch power circuits on and off

• To convert AC to DC

What does the NEMA rating of an enclosure primarily indicate?

• The motor's horsepower rating

• The level of protection against environmental conditions

• The maximum operating temperature

• The type of insulation used

Which device is used to change the direction of rotation of a three-phase motor?

• Timer

• Reversing starter

• Limit switch

• Current transformer

What is the purpose of a control transformer in a motor control panel?

• To step up the voltage for the motor

•  To step down the voltage for the control circuit

• To measure the motor current

• To provide isolation from the power supply