Electrical Machines Eb/Vt ratio of a DC motor is an indication of efficiency. running torque. starting torque. speed regulation. efficiency. running torque. starting torque. speed regulation. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Breather is provided in a transformer to provide cold air in transformer. absorb moisture from air entering in transformer. absorb moisture of air during breathing. filter the transformer oil. provide cold air in transformer. absorb moisture from air entering in transformer. absorb moisture of air during breathing. filter the transformer oil. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC machine, for the same value of Æ, Z and N; which one of the following statements is correct? Armature emf is less with wave winding than with lap winding. Armature emf is more with wave winding than with lap winding. Armature emf is same as long as the flux density in the air gap remains the same. Armature emf depends on weather the machine is running as a motor or generator. Armature emf is less with wave winding than with lap winding. Armature emf is more with wave winding than with lap winding. Armature emf is same as long as the flux density in the air gap remains the same. Armature emf depends on weather the machine is running as a motor or generator. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Slot wedges in a dc machine is made up of cast iron. mild steel. fibre. silicon steel. cast iron. mild steel. fibre. silicon steel. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Addition of 0.3 % to 4.5 % silicon to iron increases the hysteresis loss. None of these increases the electrical resistivity of iron. reduces the saturation magnetization. increases the hysteresis loss. None of these increases the electrical resistivity of iron. reduces the saturation magnetization. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The direction of rotation of a 3 - Φ induction motor is clockwise when it is supplied with 3 - Φ sinusoidal voltage having phase sequence A - B - C. For counterclockwise rotation of motor, the phase sequence of the supply should be A - C - B. B - C - A or C - A - B. B - C - A. C - A - B. A - C - B. B - C - A or C - A - B. B - C - A. C - A - B. ANSWER DOWNLOAD EXAMIANS APP
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