In a universal motor, the most common cause of brush sparking is___________?
Correct answer: E. all of the above
- A. open armature winding
- B. shorted armature winding
- C. shorted field winding"
- D. high commutator mica
- E. all of the above
Explanation
Brush sparking in a universal motor can result from armature winding faults, field winding faults, or high commutator mica that prevents proper brush contact. Hence all the listed faults can produce sparking.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
Practise Electrical Machines
1,061 free Electrical Machines MCQs from Electrical Engineering, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Electrical Engineering questions like this
Electrical Engineering is on 2 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Electrical Machines questions
Most of the fractional horsepower motors have either___________?
In case of a reluctance motor, when the load is increased so that it cannot maintain synchronous speed the motor will_____________?
To reverse the direction of rotation of acapacitor start motor while it is running we should___________?
Which of the following statements regarding reluctance-start motor is incorrect ?
If starting winding of a single-phase induction motor is left in the circuit, it will____________?
If the centrifugal switch of a two-value capacitor motor using two capacitors fails to open then____________?