Electrical Machines Fifth harmonic component of the induced voltage in three phase AC generator can be eliminated by using a winding pitch of 2 / 3. 5 / 6. 6 / 7. 4 / 5. 2 / 3. 5 / 6. 6 / 7. 4 / 5. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In case of 3 - Φ IM, plugging means starting the motor on load which is more than the rated load. interchanging two supply phases for quick stopping. locking of rotor due to harmonics. pulling the motor directly on line without a rotor. starting the motor on load which is more than the rated load. interchanging two supply phases for quick stopping. locking of rotor due to harmonics. pulling the motor directly on line without a rotor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The dc motor which can provide zero speed regulation at full load without any controller, is series. cumulative compound. shunt. differential compound. series. cumulative compound. shunt. differential compound. 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 √3 1/3 1/√3 3 √3 1/3 1/√3 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The brushes of a DC machine should be placed on the commutator in the inter polar axis. armature midway between poles. armature in the polar axis. commutator in the polar axis. commutator in the inter polar axis. armature midway between poles. armature in the polar axis. commutator in the polar axis. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When the mechanical power is developed by a DC motor maximum back emf is equal to applied voltage. Back emf is equal to half of applied voltage. Back emf is equal. None of above. back emf is equal to applied voltage. Back emf is equal to half of applied voltage. Back emf is equal. None of above. ANSWER DOWNLOAD EXAMIANS APP
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