Synchronous Motors A synchronous motor runs at only one speed because it ______ Has no losses Is a doubly fed machine Has a damper winding None of the listed here Has no losses Is a doubly fed machine Has a damper winding None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors An important advantage of a synchronous motor over wound round induction motor is that its speed may be controlled more easily its speed is independent of supply frequency its power factor may be varied at will None of these its speed may be controlled more easily its speed is independent of supply frequency its power factor may be varied at will None of these ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors When the synchronous motor is pulled out of synchronism, the stator current _______ Is decreased too much Remains unchanged Becomes zero Is increased too much Is decreased too much Remains unchanged Becomes zero Is increased too much ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A synchronous capacitor is an over excited motor running at ________ Half full load Full load None of the listed here No load Half full load Full load None of the listed here No load ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors When a unity pf synchronous motor is operated at a leading pf, it results in _______ More than rated horseppwer output More than rated rotor current Less than rated horsepower output None of the listed here More than rated horseppwer output More than rated rotor current Less than rated horsepower output None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors As the load is applied to a synchronous motor, the motor takes more armature current because The increased load has to take more current The rotor strengthens the rotating field causing more motor current The back e.m.f. decreases causing an increase in motor current The rotor by shifting its phase backward causes motor to take more current The increased load has to take more current The rotor strengthens the rotating field causing more motor current The back e.m.f. decreases causing an increase in motor current The rotor by shifting its phase backward causes motor to take more current ANSWER DOWNLOAD EXAMIANS APP
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