Electrical Machines The sparking at the the brushes, in a DC machines is due to high resistance of carbon brushes. armature reaction. reactance voltage. presence of commutator. high resistance of carbon brushes. armature reaction. reactance voltage. presence of commutator. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For the same power output rating and full load speed, the motor will have poorest starting torque, is Cummulative compound. Series. Shunt. Differential compound. Cummulative compound. Series. Shunt. Differential compound. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In most condition which frame of motor will be preferred? Open type. Splash proof. Totally enclosed fan coiled. Drip proof. Open type. Splash proof. Totally enclosed fan coiled. Drip proof. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The direction of rotation of a DC motor can be determent by Flemings left hand rule. Amperes law. Lenzs law. Flemings right hand rule. Flemings left hand rule. Amperes law. Lenzs law. Flemings right hand rule. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A large series motor is never started without some mechanical on it because otherwise it will Develop excessive speed and damage itself. Draw too much current. Produce sparking at brushes. Open fuse or circuit breaker. Develop excessive speed and damage itself. Draw too much current. Produce sparking at brushes. Open fuse or circuit breaker. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The current drawn by the armature of DC motor is directly proportional to The torque required. None of above. The voltage across the terminals. The speed of motor. The torque required. None of above. The voltage across the terminals. The speed of motor. ANSWER DOWNLOAD EXAMIANS APP
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