DC Motors What will happen if the back emf of a dc motor vanishes suddenly? The motor will continue to run The armature may burn The motor will run noisy The motor will stop The motor will continue to run The armature may burn The motor will run noisy The motor will stop ANSWER DOWNLOAD EXAMIANS APP
DC Motors For the same H.P. rating and full load speed, following motor has poor starting torque Differentially compounded Cumulatively compounded Series Shunt Differentially compounded Cumulatively compounded Series Shunt ANSWER DOWNLOAD EXAMIANS APP
DC Motors When the armature of a D.C. motor rotates, e.m.f. induced is Self-induced e.m.f. Mutually induced e.m.f. Back e.m.f. None of these Self-induced e.m.f. Mutually induced e.m.f. Back e.m.f. None of these ANSWER DOWNLOAD EXAMIANS APP
DC Motors Excessive motor vibration is caused by Worn bearings Open armature coil Too much brush tension Bent shaft Worn bearings Open armature coil Too much brush tension Bent shaft ANSWER DOWNLOAD EXAMIANS APP
DC Motors If a D.C. motor is to be selected for conveyors, which rriotor would be preferred ? Differentially compound motor Shunt motor Cumulative compound motor Series motor Differentially compound motor Shunt motor Cumulative compound motor Series motor ANSWER DOWNLOAD EXAMIANS APP
DC Motors For a D.C. shunt motor if the excitation is changed Torque will remain constant Torque will change but power will remain constant Torque and power both will change Torque, power and speed, all will change Torque will remain constant Torque will change but power will remain constant Torque and power both will change Torque, power and speed, all will change ANSWER DOWNLOAD EXAMIANS APP
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