Electrical Machines
Consider the following statements regarding the speed control of dc motors : 1. ward-leonard method is suitable forconstant-torque drives 2. Ward-leonard method is suitable for constant-power drives 3. field-control method facilitates speed control below base speed 4. Armature-resistance control method is more efficient than ward-leanard method 5. Field-control method is suitable for constant-torque drives 6. Armature-resistance control method is suitable for constant-torque drives From these, the correct answer is

 1, 2, 6
 1, 2, 5
 1, 4, 6
 1, 3, 5

ANSWER DOWNLOAD EXAMIANS APP

Electrical Machines
Where the shunt generators are widely used?

 Where often load fluctuation is occurred.
 Where the load is very high.
 Where voltage variation is needed over a wide load range.
  Where a constant voltage is required over a narrow load range.

ANSWER DOWNLOAD EXAMIANS APP
MORE MCQ ON Electrical Machines