Ward Leonard Speed Control Method MCQ

Test your knowledge with important Ward Leonard Speed Control Method MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Ward Leonard Speed Control Method MCQs at Bissoy

• The disadvantage of the Ward Leonard control method is ___________
  ক

  High initial cost

  খ

  High maintenance cost

  গ

  Low efficiency at high loads

  ঘ

  High cost, high maintenance and low efficiency
• In Ward Leonard control of DC motor, the lower limit of speed is imposed by ____________
  ক

  Residual magnetism of the generator

  খ

  Core losses of motor

  গ

  Mechanical losses of motor and generator together

  ঘ

  Cannot be determined
• Ward Leonard control is basically a _____________
  ক

  Voltage control method

  খ

  Field diverter method

  গ

  Field control method

  ঘ

  Armature resistance control method
• Speed control by Ward Leonard method, can give uniform speed variation _______________
  ক

  In both directions

  খ

  In one direction

  গ

  Below normal speed only

  ঘ

  Above normal speed only.
• To get the speed of DC motor below the normal speed without wastage of electrical energy we use __________________
  ক

  Ward Leonard control

  খ

  Rheostatic control

  গ

  Any of the Ward Leonard or rheostatic method can be used

  ঘ

  Not possible
• Starting gear used in Ward Leonard method___________
  ক

  Is of small size

  খ

  Is of large size

  গ

  Size depends on application

  ঘ

  Is absent
• Ward Leonard method is an ideal choice for motor which undergoes frequent starting, stopping, speed reversal.
  ক

  True

  খ

  False
• Efficiency of Ward Leonard method is ____________
  ক

  Higher than rheostatic control method but lower than shunted field control method

  খ

  Lower than rheostatic control method

  গ

  Higher than rheostatic control method and shunted field control method

  ঘ

  Depends on load
• Speed-power characteristic for Ward Leonard speed control method _________________
  ক

  Will start from origin

  খ

  Will start from some positive value on power axis

  গ

  Will start from some positive value on speed axis

  ঘ

  Depends on other parameters
• Reducing the field current will give us _______________
  ক

  Constant torque and variable power speed control

  খ

  Constant torque speed control

  গ

  Variable power speed control

  ঘ

  Constant power speed control
• In Ward Leonard speed control method for increasing the speed of the motor ______________
  ক

  Reduce armature voltage

  খ

  Increase armature voltage

  গ

  Increase field current

  ঘ

  Decrease field current
• Reducing the armature voltage will give us _______________
  ক

  Variable torque speed control

  খ

  Constant torque speed control

  গ

  Variable and constant both can be achieved

  ঘ

  Cannot comment on torque
• In Ward Leonard speed control method for lowering the speed of the motor ______________
  ক

  Reduce armature voltage

  খ

  Increase armature voltage

  গ

  Increase field current

  ঘ

  Decrease field current
• Which of the following component is not used in Ward Leonard method?
  ক

  AC motor

  খ

  DC generator

  গ

  DC motor

  ঘ

  AC generator
• Ward Leonard method is ___________
  ক

  Armature control method

  খ

  Field control method

  গ

  Combination of armature control method and field control method

  ঘ

  Totally different from armature and field control method