The armature shaft of a DC motor must be able to withstand ______________(a) Bending moment due to weight of the armature.(b) Any unbalanced magnetic pull on the armature core.(c) Twisting stains due to transmission of torque.(d) Bending moment, unbalanced magnetic pull and twisting stainsThe question was asked during an interview for a job.Origin of the question is DC Motor Basics -1 topic in chapter DC Motors of DC Machines

The armature shaft of a DC motor must be able to withstand ___________

1.	The armature shaft of a DC motor must be able to withstand ______________(a) Bending moment due to weight of the armature.(b) Any unbalanced magnetic pull on the armature core.(c) Twisting stains due to transmission of torque.(d) Bending moment, unbalanced magnetic pull and twisting stainsThe question was asked during an interview for a job.Origin of the question is DC Motor Basics -1 topic in chapter DC Motors of DC Machines
Answer» Right CHOICE is (d) Bending MOMENT, unbalanced magnetic pull and twisting stains To explain: The ARMATURE shaft must be able to WITHSTAND any unbalanced magnetic pull on the armature core, bending moment due to weight of the armature and commutator, twisting stains due to transmission of torque, for a good and long run application of motor.

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