D.C. generators are normally designed for maximum efficiency around_____________?

Related Mcqs:

A D.C. series motor is that which______________?

A. has its field winding consisting of thick wire and less turns B. has a poor torque C. can be started easily without load D. has almost constant speed...

In a D.C. series motor, if the armature current is reduced by 50%, the torque of the motor will be equal to

A. 100% of the previous value B. 50% of the previous value C. 25% of the previous value D. 10% of the previous value E. none of the above...

The speed of a D.C. shunt motor can be increased by_______________?

A. increasing the resistance in armature circuit B. increasing the resistance in field circuit C. reducing the resistance in the field circuit D. reducing the resistance in the armature circuit...

For constant torque drive which speed control method is preferred ?

A. Field control B. Armature voltage control C. Shunt armature control D. Mechanical loading system...

With the increase in temperature, the speed of DC series motor______________?

A. decreases B. increases C. remain same D. none of the above...