Electrical Machines Sparkless commutation can be achieved by employing compensating winding. high resistance carbon brushes. any one or more of the above methods. inter poles. compensating winding. high resistance carbon brushes. any one or more of the above methods. inter poles. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Belt conveyors offer _______________ starting torque. low. zero. high. medium. low. zero. high. medium. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For a DC machine having P no of pair of pole pairs, Z no of conductors having length L of resistivity ρ and cross section S are arranged. what is the armature resistance? PZL/4S PZL/4Sp² PZL/4Sa² PZL/ 4Sa PZL/4S PZL/4Sp² PZL/4Sa² PZL/ 4Sa ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A short circuit test on a transformer gives copper loss at full load. copper loss at over load. copper loss at half load. copper loss at any load. copper loss at full load. copper loss at over load. copper loss at half load. copper loss at any load. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In case the conditions for maximum power for DC motor are established, the efficiency of the motor will be Any where between 75 % and 90 %. Around 90 % Less than 50 % Around 100 %. Any where between 75 % and 90 %. Around 90 % Less than 50 % Around 100 %. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In dc machines, 1. reactance voltage is proportional to armature current 2.reactance voltage is proportional to core length 3.reactance voltage is due to self-flux of the coil undergoing commutation 4. armature-cross flux is neutralized by interpolar flux 5. interpolarmmf is more than armature mmf in the interpolar zone From these, the correct answer is 2, 3, 4 1, 2, 3, 4 1, 2, 5 1, 3, 5 2, 3, 4 1, 2, 3, 4 1, 2, 5 1, 3, 5 ANSWER DOWNLOAD EXAMIANS APP
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