DC Motors For constant torque drive which speed control method is preferred? Field control Mechanical loading system Armature voltage control Shunt armature control Field control Mechanical loading system Armature voltage control Shunt armature control ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which of the following losses are significantly reduced by laminating the core of a D.C. generator? Windage losses Hysteresis losses Copper losses Eddy current losses Windage losses Hysteresis losses Copper losses Eddy current losses ANSWER DOWNLOAD EXAMIANS APP
DC Motors The commutating winding is basically used in a dc machine To improve commutation To control the speed of machine To reduce armature reaction None of the listed here To improve commutation To control the speed of machine To reduce armature reaction None of the listed here ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which of the following loss in a D.C. generator varies significantly with the load current? Field copper loss None of these Windage loss Armature copper loss Field copper loss None of these Windage loss Armature copper loss ANSWER DOWNLOAD EXAMIANS APP
DC Motors A dc motor is still used in industrial applications because it Is simple in construction Provides fine speed control None of the listed here Is cheap Is simple in construction Provides fine speed control None of the listed here Is cheap ANSWER DOWNLOAD EXAMIANS APP
DC Motors The speed of a motor falls from 1100 r.p.m. at no-load to 1050 r.p.m. at rated load. The speed regulation of the motor is 8.85% 4.76% 2.22% 6.77% 8.85% 4.76% 2.22% 6.77% ANSWER DOWNLOAD EXAMIANS APP
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