Electrical Machines Maximum allowable moisture content of power transformer insulating oil is generally taken as 45 ppm. 25 ppm. 35 ppm. 20 ppm. 45 ppm. 25 ppm. 35 ppm. 20 ppm. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The air gap between the yoke and armature is dc machine is kept very small All of these to achieve a stronger magnetic field. to avoid over heating. to avoid locking of the armature. All of these to achieve a stronger magnetic field. to avoid over heating. to avoid locking of the armature. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Sparkless commutation can be achieved by employing inter poles. any one or more of the above methods. compensating winding. high resistance carbon brushes. inter poles. any one or more of the above methods. compensating winding. high resistance carbon brushes. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The direction of rotation of a DC motor can be determent by Lenzs law. Flemings left hand rule. Flemings right hand rule. Amperes law. Lenzs law. Flemings left hand rule. Flemings right hand rule. Amperes law. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Hysteresis loss is proportional to f2. f. f3. f1.5. f2. f. f3. f1.5. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a star - delta starting of an IM resistance is inserted in the rotor. line voltage is 57.7 % of stator voltage. reduced voltage is applied to the stator. applied voltage per stator phase is 57.7 % of a line volt resistance is inserted in the rotor. line voltage is 57.7 % of stator voltage. reduced voltage is applied to the stator. applied voltage per stator phase is 57.7 % of a line volt ANSWER DOWNLOAD EXAMIANS APP
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