Home/Electrical-Engineering/DC Motors

DC Motors MCQs

313 questionsElectrical-EngineeringPage 34 of 35

Practice free DC Motors multiple-choice questions with instant answer feedback and step-by-step solutions. Click an option to check yourself, reveal the full explanation, and work through all 313 questions — no login required.

Question 298easy

To achieve sparkless commutation brushes of a D.C. generator are rocked ahead so as to bring them

⚑ Report ✎ Feedback

Question 299easy

To avoid formation of grooves in the commutator of a D.C. machine

⚑ Report ✎ Feedback

Question 300easy

The following constitute short-circuit in the armature winding.

⚑ Report ✎ Feedback

Question 301easy

The rapit wear of brushes takes place due to

⚑ Report ✎ Feedback

Question 302easy

Number of tappings for each equilizer ring is equal to

⚑ Report ✎ Feedback

Question 303easy

A D.C. generator can be considered as

⚑ Report ✎ Feedback

Question 304easy

Lap winding is composed of

⚑ Report ✎ Feedback

Question 305easy

In a D.C. generator is case the resistance of the field winding is increased, then output voltage will

⚑ Report ✎ Feedback

Question 306easy

A sinusoidal voltage of 5 Hz is applied to the field of a shunt generator. The armature voltage wave

⚑ Report ✎ Feedback