Electrical Machines Transformer cooling and insulating oil must be of low resistivity. low viscosity. high viscosity. low BDV. low resistivity. low viscosity. high viscosity. low BDV. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines DC Motor dc shunt motor with field weakening. dc shunt with armature resistance control. dc compound motor. dc series motor. dc shunt motor with field weakening. dc shunt with armature resistance control. dc compound motor. dc series motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If two 8-pole dc machines of identical armature sare wound, one with lap winding and the other with wave winding, then lap-wound machine will have more rated voltage and more current wave-wound machine will have more rated current and more voltage wave-wound machine will have more rated voltage and less current lap-wound machine will have more rated voltage and less current lap-wound machine will have more rated voltage and more current wave-wound machine will have more rated current and more voltage wave-wound machine will have more rated voltage and less current lap-wound machine will have more rated voltage and less current ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Under which of the following conditions hunting of synchronous motor is likely to occur ? Periodic variation of load. Over-excitation. Over-loading for long period. Small and constant load. Periodic variation of load. Over-excitation. Over-loading for long period. Small and constant load. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When applied rated voltage per phase is reduce to one half, the starting torque of three phase squirrel cage induction motor becomes twice the initial value 1/2 of the initial value 1/4 of the intial value 4 time the initial value twice the initial value 1/2 of the initial value 1/4 of the intial value 4 time the initial value ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is the emf generated by a 4 pole Lap connected DC Motor rotating at 1500 rpm having 1000 conductors and useful flux per pole is 0.4 mWb. 30 volts. 40 volts. 10 volts. 20 volts. 30 volts. 40 volts. 10 volts. 20 volts. ANSWER DOWNLOAD EXAMIANS APP
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