Electrical Machines Field weakening method is also called as-----------? constant voltage control constant current control constant power control constant torque control constant voltage control constant current control constant power control constant torque control ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The condition for maximum running torque is R = S.X 0.5 lagging zero unity 0.707 lagging R = S.X 0.5 lagging zero unity 0.707 lagging ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Slip rings of an induction motors are made of aluminium. stainless steel. phosphor bronze. carbon. aluminium. stainless steel. phosphor bronze. carbon. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Consider the following statements regarding the speed control of dc motors : 1. ward-leonard method is suitable forconstant-torque drives 2. Ward-leonard method is suitable for constant-power drives 3. field-control method facilitates speed control below base speed 4. Armature-resistance control method is more efficient than ward-leanard method 5. Field-control method is suitable for constant-torque drives 6. Armature-resistance control method is suitable for constant-torque drives From these, the correct answer is 1, 3, 5 1, 2, 5 1, 4, 6 1, 2, 6 1, 3, 5 1, 2, 5 1, 4, 6 1, 2, 6 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC generators, the residual magnetism is of the order of 15 %. 2.5 %. 10 %. 20 %. 15 %. 2.5 %. 10 %. 20 %. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A synchronous generator is feeding a zero power factor (lagging) load at rated current. The armature reaction is demagnetizing. magnetizing. ineffective. cross – magnetizing. demagnetizing. magnetizing. ineffective. cross – magnetizing. ANSWER DOWNLOAD EXAMIANS APP
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