The rapid wear of brushes takes place due to – McqOptions

MCQOPTIONS

1.	The rapid wear of brushes takes place due to
A.	Abrasion from dust
B.	Excessive spring pressure
C.	Rough commutator bars
D.	All of the above factors
Answer» E.

Discussion

No Comment Found

Related MCQs

A DC shunt generator supplies a load of 7.5 kW at 200 V. If the armature resistance is 0.6 Ω and field resistance is 80 Ω, the induced emf will be
A DC generator delivers a 30-A current to a load at 120 V by consuming 4500 J/s of mechanical energy. Determine the efficiency of the generator.
Field coils of DC generator are usually made up of
In lap winding, the number of parallel paths are always:
In DC machines, the distance between two adjacent poles can be defined as:
In dc machines, the field – flux axis and armature – mmf axis are respectively placed along
In a 6-pole DC machine, with lap winding, the number of parallel paths in the armature will be:
A series motor of resistance 1 Ω between terminals runs at 800 rpm at 200 V with a current of 15 A. Determine the speed at which it will run when connected in series with a 5 Ω resistance and taking the same current at the same supply voltage
Match List-I (types of DC Generators with List-II (Applications) and select the correct answer using the given options.List-IList-IIA. Series Generator1. Arc weldingB. Shunt Generator2. Supply of distant loadsC. Cumulative Compounded3. BoosterD. Differentially Compounded4. battery Charging
Determine the generated EMF of the given generator if the armature resistance is 0.1 Ω.