DC Motors In a dc motor constant torque is produced due to Commutator End plates Rotor laminations Pole shoes Commutator End plates Rotor laminations Pole shoes ANSWER DOWNLOAD EXAMIANS APP
DC Motors A dc series motor is best suited for driving None of the listed here Shear and punches Cranes and hoists Machine tools None of the listed here Shear and punches Cranes and hoists Machine tools ANSWER DOWNLOAD EXAMIANS APP
DC Motors The commutating winding is basically used in a dc machine To control the speed of machine To reduce armature reaction To improve commutation None of the listed here To control the speed of machine To reduce armature reaction To improve commutation None of the listed here ANSWER DOWNLOAD EXAMIANS APP
DC Motors As there is no back e.m.f. at the instant of starting a D.C. motor, in order to prevent a heavy current from flowing though the armature circuit Armature is temporarily open circuited A resistance is connected in series with armature A high value resistor is connected across the field winding A resistance is connected parallel to the armature Armature is temporarily open circuited A resistance is connected in series with armature A high value resistor is connected across the field winding A resistance is connected parallel to the armature ANSWER DOWNLOAD EXAMIANS APP
DC Motors Excessive motor vibration is caused by Too much brush tension Open armature coil Worn bearings Bent shaft Too much brush tension Open armature coil Worn bearings Bent shaft ANSWER DOWNLOAD EXAMIANS APP
DC Motors Three point starter can be used for Both shunt and compound motor Series motor only Shunt motor only Compound motor only Both shunt and compound motor Series motor only Shunt motor only Compound motor only ANSWER DOWNLOAD EXAMIANS APP
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