Electrical Machines Which type of motors are preferred in lifts? None of these DC compound motors. DC shunt motors. DC series motors. None of these DC compound motors. DC shunt motors. DC series motors. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The main purpose of providing tertiary winding in a three phase transformer is None of these to interconnect three voltage systems. to suppress harmonic and unbalance in voltage. to carry extra load. None of these to interconnect three voltage systems. to suppress harmonic and unbalance in voltage. to carry extra load. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The shaft of induction motor may be unbalanced due to poor lubrication. overheating of winding. overload. uneven air gap. poor lubrication. overheating of winding. overload. uneven air gap. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a synchronous generator with constant steam input supplies power to an infinite bus at a lagging power factor. If the excitation is increased power angle increase and power factor decrease both power angle and power factor increase power angle decrease and power factor increase both power angle and power factor decrease power angle increase and power factor decrease both power angle and power factor increase power angle decrease and power factor increase both power angle and power factor decrease ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following generators are used in arc welding? series generators differential compound generators cumulative compound generators shunt generators series generators differential compound generators cumulative compound generators shunt generators 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 1, 3, 5 1, 2, 3, 4 1, 2, 5 2, 3, 4 1, 3, 5 1, 2, 3, 4 1, 2, 5 2, 3, 4 ANSWER DOWNLOAD EXAMIANS APP
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