In any rotating machine that part which houses the conductors and in which EMF. induced is to be utilized is known as Armature Field Rotor Stator Correct answer: 1. Armature Visit Electrical Engineering MCQ here for more
XYZ energized winding of a DC machine should not be opened, since doing so will produce high inductive voltage that may be dangerous to personnel and can also cause its own insulation failure Compensating field Inter pole field Series field Shunt field Correct answer: 4. Shunt field Visit Electrical Engineering MCQ here for more
In DC generators, number of tapings for each equalizer ring equals Number of commutator segments Number of parallel paths Number of pole pairs Number of poles Correct answer: 3. Number of pole pairs Visit Electrical Engineering MCQ here for more
Wave winding comprises of Any even number of conductors Any odd number of conductors That even number which is exact multiple of poles That even number which is exact multiple of poles + 2 Correct answer: 4. That even number which is exact multiple of poles + 2 Visit Electrical Engineering MCQ here for more
Which of following constitute short-circuit in the armature winding Insulation failure between two commutator bars Insulation failure between two turns of a coil Two of more turns of the same coil getting grounded All of these Correct answer: 4. All of these Visit Electrical Engineering MCQ here for more
To evade formation of grooves in the commutator of a machine, what should be done Brush position has no effect on the commutator grooving The brushes of opposite polarity should track each other The brushes of same polarity should track each other All of above Correct answer: 2. The brushes of opposite polarity should track … Read more
The type of generator that will be in a position to build up without any residual magnetism in the poles Compound generator Self-excited generator Series generator Shunt generator Correct answer: 2. Self-excited generator Visit Electrical Engineering MCQ here for more
Number of armature parallel paths in a two-pole generator having duplex lap winding is 2 4 6 8 Correct answer: 2. 4 Visit Electrical Engineering MCQ here for more
Copper brushes in machines are used In both of the above cases Where high voltage and small currents are involved Where low voltage and high currents are involved None of above Correct answer: 3. Where low voltage and high currents are involved Visit Electrical Engineering MCQ here for more
In case of DC generators, brushes on commutator remain in contact with conductors which Are farthest from the poles Lie under interpolar region Lie under North Pole Lie under South Pole Correct answer: 2. Lie under interpolar region Visit Electrical Engineering MCQ here for more