Electrical Machines Normally for the design of transformer the ambient temperature is taken as 27°C. 32°C. 35°C. 45°C. 27°C. 32°C. 35°C. 45°C. 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, 4, 6 1, 3, 5 1, 2, 6 1, 2, 5 1, 4, 6 1, 3, 5 1, 2, 6 1, 2, 5 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The shaft of induction motor may be unbalanced due to overload. poor lubrication. uneven air gap. overheating of winding. overload. poor lubrication. uneven air gap. overheating of winding. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following DC Motor requires 3 point starter? Shunt motor. Shunt, compound and series motor. Series motor. Shunt motor as well as compound motors. Shunt motor. Shunt, compound and series motor. Series motor. Shunt motor as well as compound motors. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Commutators in DC machines have a role of which converts Both AC to DC and DC to AC. none of these. high voltage DC to low voltage DC. AC to DC. Both AC to DC and DC to AC. none of these. high voltage DC to low voltage DC. AC to DC. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Commutator pitches of duplex and simplex lap windings are respectively 2 and 1 4 and 2 2 and 2 4 ang 1 2 and 1 4 and 2 2 and 2 4 ang 1 ANSWER DOWNLOAD EXAMIANS APP
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