Question 118Electricity & Electronics - QMED
70% to passIf a short circuit in the armature of a DC motor occurs what would be the result?
Afail to start
Bhum when energized
Cspark at the brushes
Drun fast
AI Explanation
The correct answer is C) spark at the brushes. A short circuit in the armature of a DC motor would cause a high current flow, resulting in sparking at the brushes. This is because the short circuit bypasses the normal armature winding resistance, allowing excessive current to flow and create an arc at the brush-commutator interface. The other options are incorrect because: A) a short circuit would not prevent the motor from starting, B) humming is typically caused by other issues, and D) a short circuit would not make the motor run faster.
Related Questions
Q254:What is the name of the DC motor speed control method utilized as shown in figur... Q422:If a shipboard AC generator experiences a failure to produce a voltage, what may... Q509:When shore power is being connected to a ship in drydock, what must be ensured, ... Q210:With respect to electrical enclosure types, how may an electric motor be designe... Q1:The winch shown in the illustration will operate normally in all speeds in both ...
Ready to test your knowledge?
Take a Electricity & Electronics - QMED Practice ExamOfficial Resources