Electrical Machines Pole changing methods are suitable only for ___________ type induction motor. linear. wound. none of these. cage. linear. wound. none of these. cage. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A delta/star transformer is connected in parallel to a star/delta transformer. The turn ratio former is x times latter, the x is 3 1/3 1/√3 √3 3 1/3 1/√3 √3 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Use of fractional pitch winding results in reduced axial length of the machine. make it stiffer. results in reduced leakage reactance. All of these results in reduced axial length of the machine. make it stiffer. results in reduced leakage reactance. All of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following is/are the advantages of carbon brush over the copper brush? All of these They are self lubricating in nature In case of any sparking they will be less damaged than copper brushes They are not hard as copper brush All of these They are self lubricating in nature In case of any sparking they will be less damaged than copper brushes They are not hard as copper brush ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A separately-excited dc motor has an armature resistance of 0.5 Ω. It runs off a 250 V dc supply Drawing an armature current of 20 A at 1500 rpm. The torque developed for an armature current Of 10 A, for the same field current, will be 15.92 Nm 15.6 Nm 16.55 Nm 15.28 Nm 15.92 Nm 15.6 Nm 16.55 Nm 15.28 Nm ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The residual magnetism of a self-excited dc generator is lost. To build up its emf again the field winding must be replaced field winding must be excited by low voltage dc supply the armature connection must be reversed the field winding connection must be reversed the field winding must be replaced field winding must be excited by low voltage dc supply the armature connection must be reversed the field winding connection must be reversed ANSWER DOWNLOAD EXAMIANS APP
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