Electrical Machines Voltage across the open circuited field termninals of a synchorous machine under slip test is A modulated supply frequency AC voltage with slip frequency envelop. DC of slip frequency. AC of supply frequency. DC. A modulated supply frequency AC voltage with slip frequency envelop. DC of slip frequency. AC of supply frequency. DC. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC machine shape of armature MMF wave is? Peaky in nature. Triangular and directed towards brush axis. Saddle shape. Triangular and directed towards main pole. Peaky in nature. Triangular and directed towards brush axis. Saddle shape. Triangular and directed towards main pole. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Compensating winding is placed in the armature core All of these pole shoe main field armature core All of these pole shoe main field ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Slip test is performed to determine positive sequence reactance and negative sequence reactance All of these direct axis reactance and quadrature axis reactance slip positive sequence reactance and negative sequence reactance All of these direct axis reactance and quadrature axis reactance slip ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines It is an advisable to use auto transformer if the transformation ratio is 0.25. near to 1. 0.5. Greater than 1. 0.25. near to 1. 0.5. Greater than 1. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature of DC machine is made of silicon steel lamination to reduce eddy current loss only. increase the permeability. reduce hysteresis loss only. reduce both eddy current and hysteresis loss. reduce eddy current loss only. increase the permeability. reduce hysteresis loss only. reduce both eddy current and hysteresis loss. ANSWER DOWNLOAD EXAMIANS APP
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