Electrical Machines Armature of DC machine is made of insulating material. silicon steel. conducting material. non-ferrous material. insulating material. silicon steel. conducting material. non-ferrous material. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which motor cannot be started on no load? series motors both B and C cumulative compound motors shunt motors series motors both B and C cumulative compound motors shunt motors ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A commutator in DC machines can 1. provide half-wave rectification 2. Provide full-wave rectification 3. convert ac to dc 4. Convert dc to ac 5. provide controlled full-wave rectification From these, the correct answer is 1, 2, 3 2, 3 ,5 2, 3, 4, 5 2, 3, 4 1, 2, 3 2, 3 ,5 2, 3, 4, 5 2, 3, 4 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The stator core of a 3 - Φ induction motor is laminated in order to reduce the both of the above. eddy current loss. weight of the stator. hysteresis loss. both of the above. eddy current loss. weight of the stator. hysteresis loss. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What does the use the of height flux density value in transformer design lead to? Decrease in weight/KVA. Reduced copper loss. Increase in weight/KVA. Reduced iron loss. Decrease in weight/KVA. Reduced copper loss. Increase in weight/KVA. Reduced iron loss. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The air gap between the yoke and armature is dc machine is kept very small to avoid locking of the armature. to avoid over heating. to achieve a stronger magnetic field. All of these to avoid locking of the armature. to avoid over heating. to achieve a stronger magnetic field. All of these ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS