Synchronous Motors A synchronous motor is cheaper than 3-phase induction motor for _____ High speed, high output Low speed, high output High speed, low output None of the listed here High speed, high output Low speed, high output High speed, low output None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A synchronous motor connected to infinite bus-bars has at constant full load, 100% excitation and unity power factor. On changing the excitation only, the armature current will have leading power factor with under-excitation lagging power factor with over-excitation no change of power factor leading power factor with over-excitation leading power factor with under-excitation lagging power factor with over-excitation no change of power factor leading power factor with over-excitation ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors The pull out torque of a synchronous motor will ______ as the field excitation is increased. Decrease Remain unchanged Increase None of the listed here Decrease Remain unchanged Increase None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A 50 Hz synchronous motor runs at 200 rpm. The number of salient poles on the rotor are______ 30 36 16 None of the listed here 30 36 16 None of the listed here ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A synchronous motor can operate at Leading power factor Unity power factor only Lagging power factor only Lagging, leading and unity power factors Leading power factor Unity power factor only Lagging power factor only Lagging, leading and unity power factors ANSWER DOWNLOAD EXAMIANS APP
Synchronous Motors A synchronous machine with large air gap has a small value of inherent regulation a higher value of stability limit a higher synchronizing power which makes the machine less sensitive to load variations all of the listed here a small value of inherent regulation a higher value of stability limit a higher synchronizing power which makes the machine less sensitive to load variations all of the listed here ANSWER DOWNLOAD EXAMIANS APP
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