Electrical Machines When applied rated voltage per phase is reduce to one half, the starting torque of three phase squirrel cage induction motor becomes 1/4 of the intial value twice the initial value 4 time the initial value 1/2 of the initial value 1/4 of the intial value twice the initial value 4 time the initial value 1/2 of the initial value ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What type of dielectric material is used in capacitors used for fans and for power factor correction? Glass. Mica. Oil impregnated paper. Vacuum. Glass. Mica. Oil impregnated paper. Vacuum. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is the phase difference between two windings of A.C servomotor ? 120°. 90°. 60°. 30°. 120°. 90°. 60°. 30°. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In 3 - Φ induction motor some times copper bars are placed deep in the rotor to improve starting torque. reduce copper loss. improve efficiency. improve power factor. improve starting torque. reduce copper loss. improve efficiency. improve power factor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Transformer action requires a alternating electric flux. increasing magnetic flux. constant magnetic flux. alternating magnetic lux. alternating electric flux. increasing magnetic flux. constant magnetic flux. alternating magnetic lux. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Fufuraldehyde analysis is done to determine the condition of paper insulation in transformer. condition of cork gaskets used in transformer. condition of oil in transformer. condition of lamination on CRGO steel sheet. condition of paper insulation in transformer. condition of cork gaskets used in transformer. condition of oil in transformer. condition of lamination on CRGO steel sheet. ANSWER DOWNLOAD EXAMIANS APP
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