DC Motors A dc series motor is most suitable for Pump Lathes Punch presses Cranes Pump Lathes Punch presses Cranes ANSWER DOWNLOAD EXAMIANS APP
DC Motors In D.C. motor which of the following can sustain the maximum temperature rise? Slip rings Field winding Commutator Armature winding Slip rings Field winding Commutator Armature winding ANSWER DOWNLOAD EXAMIANS APP
DC Motors Carbon brushes are preferable to copper brushes because _____ They have lower resistance They have longer life They reduce sparking They reduce armature reaction They have lower resistance They have longer life They reduce sparking They reduce armature reaction ANSWER DOWNLOAD EXAMIANS APP
DC Motors If a dc motor is comnected across the AC supply it will Run at lower speed Not run Run at normal speed Burn due to heat produced in the field winding by eddy currents Run at lower speed Not run Run at normal speed Burn due to heat produced in the field winding by eddy currents ANSWER DOWNLOAD EXAMIANS APP
DC Motors Where D.C. motor of H.P. 12 or more requires frequent starting, stopping, reversing and speed control Drum type controller is used Four point starter is used All above can be used Three point starter is used Drum type controller is used Four point starter is used All above can be used Three point starter is used ANSWER DOWNLOAD EXAMIANS APP
DC Motors In case the conditions for maximum power for a D.C. motor are established, the efficiency of the motor will be Around 90% Anywhere between 75% and 90% Less than 50% 1 Around 90% Anywhere between 75% and 90% Less than 50% 1 ANSWER DOWNLOAD EXAMIANS APP
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