Electrical Machines Maximum allowable tan - delta (tanδ) of dielectric dispassion factor of power transformer insulating oil is generally taken as 3 at 90°C. 0.5 at 90°C. 2 at 90°C. 1 at 90°C. 3 at 90°C. 0.5 at 90°C. 2 at 90°C. 1 at 90°C. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Type of single phase motor having highest power factor at full load is split phase. capacitor run. shaded pole type. capacitor start. split phase. capacitor run. shaded pole type. capacitor start. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Use of fractional pitch winding make it stiffer. results in reduced leakage reactance. results in reduced axial length of the machine. All of these make it stiffer. results in reduced leakage reactance. results in reduced axial length of the machine. All of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In travelling cranes for crane travel, trolley and boom hoist which motor is preferred? Stepper motor. DC differential compound motor. Slip ring induction motor. Synchronous motor. Stepper motor. DC differential compound motor. Slip ring induction motor. Synchronous motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 10 kW, 230 V, dc shunt machine has four terminals brought out through four leads. For this machine armature winding has thin leads whereas field winding has thick leads both the windings have thick leads both the windings have thin leads armature winding has thick leads whereas field winding has thin leads armature winding has thin leads whereas field winding has thick leads both the windings have thick leads both the windings have thin leads armature winding has thick leads whereas field winding has thin leads ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 220 V DC machine has an armature resistance 1Ω. If the full load current is 20 A, the difference of induced voltage and generator is 60 V. 20 V. 0 V. 40 V. 60 V. 20 V. 0 V. 40 V. ANSWER DOWNLOAD EXAMIANS APP
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