AC Motors MCQ

Test your knowledge with important AC Motors MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more AC Motors MCQs at Bissoy

• DC Servomotors generate low torque at the zero velocity.
  ক

  False

  খ

  True
• Which point does the torque required by the motor and the torque required by the load will be balanced in a steady state operation?
  ক

  Modulating Point

  খ

  Operating point

  গ

  Null Point

  ঘ

  Reduction Point
• Which curve shows the motor torque relationship with angular velocity?
  ক

  Stress Torque curve

  খ

  Stress strain curve

  গ

  Force Torque curve

  ঘ

  Torque speed curve
• Which consists of copper wire windings around a ferrous metal core?
  ক

  Armature

  খ

  Brush

  গ

  Encoder

  ঘ

  Regulator
• Which of the following motor uses feedback loop to regulate speed?
  ক

  Modular Motor

  খ

  AC Motor

  গ

  Servomotor

  ঘ

  DC Motor
• Which of the following motor uses solid state circuitry to replace brushes and Commutator components?
  ক

  Brushless DC Motor

  খ

  Brushless AC Motor

  গ

  Brushed DC Motor

  ঘ

  Brushed AC Motor
• Which of the following motors are the most widely used because of its relatively simple construction and low manufacturing cost?
  ক

  Reversible Motor

  খ

  Induction Motor

  গ

  Modular Motor

  ঘ

  Synchronous Motor
• Which is a device used to initiate the rotation of the rotor when the power is supplied to the synchronous motor?
  ক

  Polarizer

  খ

  Repulser

  গ

  Divider

  ঘ

  Exciter
• Synchronous motors start by themselves.
  ক

  False

  খ

  True
• Which of the following does the rotational speed of the motor depends on?
  ক

  Mass

  খ

  Frequency

  গ

  Force

  ঘ

  Velocity
• Which motors operate by generating a rotating magnetic field inside the stator?
  ক

  Modular Motors

  খ

  AC Motors

  গ

  DC Motors

  ঘ

  Rotomotors
• Which of the following must be used to convert alternating current to direct current?
  ক

  Rectifier

  খ

  Electric Motor

  গ

  Transformer

  ঘ

  Generator
• What is the step angle of a hybrid stepper motor?
  ক

  0.9 degree to 3.6 degree

  খ

  0.9 degree to 7.0 degree

  গ

  0.1 degree to 1.0 degree

  ঘ

  1.0 degree to 0.9 degree
• What is the formula to calculate the step angle of a stepper motor?
  ক

  (360*ph)/nph

  খ

  (ph/nph)

  গ

  (nph/ph)

  ঘ

  (360*nph)/ph
• Which of the following is not the main selection criterion of a stepper motor?
  ক

  Resolution required

  খ

  Drive mechanism component required

  গ

  Torque required

  ঘ

  Speed
• Which among the following is a property of hybrid stepper motor?
  ক

  Contains a soft iron multi-toothed rotor

  খ

  Low cost and low-resolution motor

  গ

  The better performance provided with respect to step resolution

  ঘ

  Provides an increased magnetic flux
• Which type of stepper motors have low cost and low-resolution motor?
  ক

  Permanent magnet stepper motor

  খ

  Variable reluctance stepper motor

  গ

  Hybrid stepper motor

  ঘ

  DC motor
• A soft iron multi-toothed rotor and wound stator is present in ___
  ক

  Permanent magnet stepper motor

  খ

  Variable reluctance stepper motor

  গ

  Hybrid stepper motor

  ঘ

  DC motor
• A stepper motor is a bad choice whenever control movement is required.
  ক

  True

  খ

  False
• Which among the following is not the type of a stepper motor?
  ক

  Variable reluctance

  খ

  Permanent magnet

  গ

  Hybrid

  ঘ

  Variable magnet
• Length of rotation is directly related to ____
  ক

  Torque

  খ

  Number of input pulses

  গ

  Frequency of input pulses

  ঘ

  Solenoid
• Stepper motors are extremely reliable.
  ক

  True

  খ

  False
• The speed of the rotation of the stepper motor depends on ________
  ক

  torque

  খ

  number of input pulses

  গ

  frequency of input pulses

  ঘ

  solenoid
• Which type of device is a stepper motor?
  ক

  Electromechanical

  খ

  Electrochemical

  গ

  Embedded system

  ঘ

  Electromagnetic