Electrical Machines Which of the following is/are effects of armature reaction? All of these increases the design cost increase the maintenance and repair increase the iron loss All of these increases the design cost increase the maintenance and repair increase the iron loss ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which is the arrangement of windings in a core type single phase transformer? Lv on one core limb and hv on the other Sandwiched lv and hv discs on each core limb Half hv inside and half lv outside on each core limb Half lv inside and half hv outside on each core limb Lv on one core limb and hv on the other Sandwiched lv and hv discs on each core limb Half hv inside and half lv outside on each core limb Half lv inside and half hv outside on each core limb ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When excitation is increased (over excitation), the synchronous generator operates at any of the above. leading power factor. lagging power factor. unity power factor. any of the above. leading power factor. lagging power factor. unity power factor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature mmf in a dc machine is 1. stationary with respect to field poles 2. stationary with respect to armature 3. rotating with respect to field poles 4. rotating with respect to armature From these, the correct answer is 1, 3 2, 4 2, 3 1, 4 1, 3 2, 4 2, 3 1, 4 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If starting current of a 3 - Φ induction motor is 5 times the rated current, while rated slip is 4 %, then ratio of starting torque to full load torque is 0.8. 0.4. 1. 0.6. 0.8. 0.4. 1. 0.6. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A single-winding single-phase motor has low starting torque. zero starting torque. starting torque equal to full-load torque. high starting torque. low starting torque. zero starting torque. starting torque equal to full-load torque. high starting torque. ANSWER DOWNLOAD EXAMIANS APP
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