DC Motors » Exercise - 1 1. The direction of rotation of a D.C. series motor can be changed by : (a) interchanging supply terminals (b) interchanging field terminals (c) either of (a) and (b) above (d) None of the above 2. If a D.C. motor is to be selected for conveyors, which motor would be preferred ? (a) Series motor (b) Shunt motor (c) Differentially compound motor (d) Cumulative compound motor 3. Which D.C. motor will be preferred for machine tools ? (a) Series motor (b) Shunt motor (c) Cumulative compound motor (d) Differential compound motor 4. Differentially compound D.C. motors can find applications requiring : (a) high starting torque (b) low starting torque (c) variable speed (d) frequent on-off cycles 5. Which D.C. motor is preferred for elevators ? (a) Shunt motor (b) Series motor (c) Differential compound motor (d) Cumulative compound motor
DC Motors » Exercise - 12. If a D.C. motor is to be selected for conveyors, which motor would be preferred ? (a) Series motor (b) Shunt motor (c) Differentially compound motor (d) Cumulative compound motor
DC Motors » Exercise - 15. Which D.C. motor is preferred for elevators ? (a) Shunt motor (b) Series motor (c) Differential compound motor (d) Cumulative compound motor
Servomotors » Exercise - 12. One of the basic requirements of a servomotor is that it must produce high torque at all : (a) loads (b) frequencies (c) speeds (d) voltages
Two Port Network » Exercise - 12. The number of possible combination generated by four variables taken two at a time in a two-port network is : (a) four (b) two (c) six (d) none of these
DC Motors » Exercise - 1 1. The direction of rotation of a D.C. series motor can be changed by : (a) interchanging supply terminals (b) interchanging field terminals (c) either of (a) and (b) above (d) None of the above 2. If a D.C. motor is to be selected for conveyors, which motor would be preferred ? (a) Series motor (b) Shunt motor (c) Differentially compound motor (d) Cumulative compound motor 3. Which D.C. motor will be preferred for machine tools ? (a) Series motor (b) Shunt motor (c) Cumulative compound motor (d) Differential compound motor 4. Differentially compound D.C. motors can find applications requiring : (a) high starting torque (b) low starting torque (c) variable speed (d) frequent on-off cycles 5. Which D.C. motor is preferred for elevators ? (a) Shunt motor (b) Series motor (c) Differential compound motor (d) Cumulative compound motor