Synchronous Motors If one phase of a 3 phase synchronous motor is short circuited, motor Will refused ro start Will fail to pull into step Will not come upto speed Will overheat in spots Will refused ro start Will fail to pull into step Will not come upto speed Will overheat in spots ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors In order to to reverse the direction of a synchronous motor, _______ None of the listed here Interchange any two stator lines Change supply frequency Reduce dc field excitation to zero None of the listed here Interchange any two stator lines Change supply frequency Reduce dc field excitation to zero ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors When pull-out torque occurs in a synchronous motor, the poles of the rotor are _______ None of the listed here 45° (electrical) behind stator poles Coincident with statorbpoles Mid way between N and S poles of stator None of the listed here 45° (electrical) behind stator poles Coincident with statorbpoles Mid way between N and S poles of stator ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors If the field of a synchronous motor is underexcited, the power factor will be unity zero lagging leading unity zero lagging leading ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors In a synchronous motor it the back e.m.f. generated in the armature at noload is approximately equal to the applied voltage, then the excitation is said to be zero per cent the excitation is said to be hundred per cent the motor is said to be fully loaded the torque generated is maximum the excitation is said to be zero per cent the excitation is said to be hundred per cent the motor is said to be fully loaded the torque generated is maximum ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A synchronous capacitor is an over excited motor running at ________ None of the listed here Half full load Full load No load None of the listed here Half full load Full load No load ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS