DC Motors In a D.C. series motor, if the armature current is reduced by 50%, the torque of the motor will be equal to 100% of the previous value 25% of the previous value 10% of the previous value 50% of the previous value 100% of the previous value 25% of the previous value 10% of the previous value 50% of the previous value ANSWER DOWNLOAD EXAMIANS APP
DC Motors Excessive sparking at brushes may be caused due to Worn bearings Dirt on the commutator Loose coupling Misaligment of machine Worn bearings Dirt on the commutator Loose coupling Misaligment of machine ANSWER DOWNLOAD EXAMIANS APP
DC Motors The rheostatic speed control method is very Economical Efficient Suitable for getting speeds above the normal Unsuitable for rapidly changing loads Economical Efficient Suitable for getting speeds above the normal Unsuitable for rapidly changing loads ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which of the following motor has the poorest speed regulation? Cummulative compound motor Shunt motor Differentially compound motor Series motor Cummulative compound motor Shunt motor Differentially compound motor Series motor ANSWER DOWNLOAD EXAMIANS APP
DC Motors ______ motors never use belt connected loads. Shunt Series Differentially compounded Cummulative compounded Shunt Series Differentially compounded Cummulative compounded ANSWER DOWNLOAD EXAMIANS APP
DC Motors If the speed of a dc shunt motor is increased the back emf of the motor will Increase Decrease Become zero Remains same Increase Decrease Become zero Remains same ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS