Understanding AC Motors

What is the primary type of AC motor?

• Brushless DC motor

• Synchronous motor

• Induction motor

• Stepper motor

Which of the following is a type of synchronous motor?

• Stepper motor

• Induction motor

• Salient pole synchronous motor

• Asynchronous motor

What is the main working principle of an AC motor?

• The main working principle of an AC motor is electromagnetic induction.

• Mechanical friction

• Thermal expansion

• Chemical reaction

In which application would you typically find an induction motor?

• Industrial machinery and equipment

• Home appliances

• Automotive systems

• Consumer electronics

What is the efficiency range of most AC motors?

• 50% to 70%

• 95% to 100%

• 30% to 50%

• 70% to 95%

Which component is essential for controlling the speed of an AC motor?

• Variable Frequency Drive (VFD)

• Inductor

• Capacitor

• Transformer

What type of AC motor is commonly used in household appliances?

• Single-phase induction motor

• Stepper motor

• Synchronous motor

• Three-phase induction motor

What is the role of the rotor in an AC motor?

• The rotor stores energy for later use in the motor.

• The rotor regulates the speed of the AC motor.

• The rotor generates electrical energy for the motor.

• The rotor converts electrical energy into mechanical energy in an AC motor.

Which of the following is a common method for controlling AC motor speed?

• Using a mechanical governor

• Variable frequency drive (VFD)

• Increasing the motor size

• Connecting a capacitor in parallel

What is the main advantage of using a synchronous motor?

• Constant speed operation under varying loads.

• Ability to operate without a power supply.

• High efficiency at low speeds.

• Simple construction and low cost.