Three Phase Induction Motors The shaft of an induction motor is made of High speed steel Cast iron Stainless steel Carbon steel High speed steel Cast iron Stainless steel Carbon steel ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors Slip of an induction motor is negative when Rotor speed is less than the synchronous speed of the field and are in the same direction Rotor speed is more than the synchronous speed of the field and are in the same direction None of these Magnetic field and rotor rotate in opposite direction Rotor speed is less than the synchronous speed of the field and are in the same direction Rotor speed is more than the synchronous speed of the field and are in the same direction None of these Magnetic field and rotor rotate in opposite direction ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors A wound rotor motor is mainly used in applications where ______ Speed control is required Less costly motor is not required High starting torque is required High rotor resistance is required during running Speed control is required Less costly motor is not required High starting torque is required High rotor resistance is required during running ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors At starting of a double squirrel cage induction motor _______ Lower winding is more effective Lower cage winding has low reactance None of the listed here Outer cage winding has good pf Lower winding is more effective Lower cage winding has low reactance None of the listed here Outer cage winding has good pf ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors In a squirrel cage rotor, the bars are not placed parallel to the shaft but are skewed to have ______ Less rotor losses Uniform torque None of the listed here Greater mechanical strength Less rotor losses Uniform torque None of the listed here Greater mechanical strength ANSWER DOWNLOAD EXAMIANS APP
Three Phase Induction Motors When a 3-phase induction motor is at no load, the slip is ______ 1 Practically zero 0.2 0.5 1 Practically zero 0.2 0.5 ANSWER DOWNLOAD EXAMIANS APP
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