Electrical Machines As compared to DOL starting, a cage induction motor with star-delta starting shall have reduced starting current. more starting time. smoother acceleration. more starting torque. reduced starting current. more starting time. smoother acceleration. more starting torque. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following represents the commutator pitch? Number of conductors spanned by one coil at the back end of the armature. The distance between the staring of first coil and its next successive coil Number of conductors spanned by one coil at the front end of the armature. Number of commutator segments between two successive coils. Number of conductors spanned by one coil at the back end of the armature. The distance between the staring of first coil and its next successive coil Number of conductors spanned by one coil at the front end of the armature. Number of commutator segments between two successive coils. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For a DC machine having P no of pole pairs Z no of conductors having length L of resistivity ρ and cross section S are arranged. what is the armature resistance for lap-winding ? PZL/4Sa² PZL/4SP² PZL/4S PZL/ 4Sa PZL/4Sa² PZL/4SP² PZL/4S PZL/ 4Sa ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 500 V, 120 KW, 50 Hz, star connected synchronous motor operating at 0.8 power factor leading has full load efficiency of 91%. The armature resistance is equal to 0.08Ω. The magnitude of armature current is nearly equal to 240 A. 173 A. 190 A. 127 A. 240 A. 173 A. 190 A. 127 A. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC generator the actual flux distribution depends upon size of air gap. shape of the pole shoe. clearance between tips of the adjacent pole shoes. all of above. size of air gap. shape of the pole shoe. clearance between tips of the adjacent pole shoes. all of above. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Under operating conditions the rotor conductor should be _________________ in induction motor. none. always opened. always closed. semi closed or semi opened. none. always opened. always closed. semi closed or semi opened. ANSWER DOWNLOAD EXAMIANS APP
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