Electrical Machines In a DC machine, the angle between the stator and rotor fields is dependent upon the load. 90o. 0o. 180o. dependent upon the load. 90o. 0o. 180o. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following DC Motor uses 4-point starter? DC shunt motor with field weaking control. DC compound motor. DC shunt motor with armature resistance. DC series motor. DC shunt motor with field weaking control. DC compound motor. DC shunt motor with armature resistance. DC series motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A dc shunt motor runs at a no-load speed of 1140 rpm. At full load, armature reaction weakens the main flux by 5% whereas the armature circuit voltage drops by 10%. The motor full-load speed in rpm is 1200 1203 1080 1000 1200 1203 1080 1000 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3-phase slip ring induction motor is wound for 4 poles on stator and 6 poles on the rotor. When 3-phase balanced voltage source at 50 Hz is applied, it will run at 1000 rpm 1500 rpm 750rpm zero speed 1000 rpm 1500 rpm 750rpm zero speed ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines To have sparkless commutation, the armature reaction effect in a DC machine is neutralized by shifting the brush axis from GNA to MNA. compensating winding and commutating poles. increasing field excitation. fixing the brush axis inline with the pole axis. shifting the brush axis from GNA to MNA. compensating winding and commutating poles. increasing field excitation. fixing the brush axis inline with the pole axis. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The maximum possible speed at which an alternator can be driven to generate 50 Hz and 4000 V is 4000 rpm. 1500 rpm. 3600 rpm. 3000 rpm. 4000 rpm. 1500 rpm. 3600 rpm. 3000 rpm. ANSWER DOWNLOAD EXAMIANS APP
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