**1.** In a cumulative compound DC motor with rated voltage applied with rated load, if the series winding part is shorted, then speed will be:

**2.** Net field current in a compound motor is given by _______

- I
_{f}(net)= I_{f}+ (N_{se}/N_{f}) I_{a} - I
_{f}(net)= I_{f}– (N_{se}/N_{f}) I_{a} - I
_{f}(net)= I_{f}+ (N_{f}/N_{se}) I_{a} - I
_{f}(net)= I_{f}– (N_{f}/N_{se}) I_{a}

**3.** A 4-pole, long shunt lap wound generator supplies 20 kW at a terminal voltage of 400 V. The armature resistance is 0.02 Ω, series field resistance is 0.04 Ω and shunt field resistance is 100 Ω. The brush drop may be taken as 1.0 V. Determine the induced EMF.

**4.** Which DC motor is more preferred for elevators?

- Shunt motor
- Series motor
- Differential compound motor
- Cumulative compound motor

**5. **With increase in armature current, speed of the cumulative compound motor _________

- Reduces slowly compare to shunt motor
- Reduces sharply compare to shunt motor
- Remains constant
- Increases in proportionality with armature current

**6. **The motor used for punching machine is subjected to

- No-load
- Continuous part load
- Continuous full load
- Intermittent load

**7. **Which DC motor is used in shears and punches?

- Shunt motor
- Series motor
- Cumulative compound motor
- Differential compound motor

**8. **Speed current characteristic of cumulative DC compound motor at larger values of armature current is similar to that of _______

- DC shunt motor
- Induction motor
- DC differential compound motor
- DC series motor

**9. **In which type of DC generator, one part of the field winding is in parallel with the armature winding while the other part is in series?

- Series
- Independently active
- Shunt
- Compound

**10. **The voltage and current in various branch in a long-shunt compound generator is given in the following network. Determine the generated EMF.

- 510 V
- 502.2 V
- 504.16 V
- 512.2 V

**11. **Where speed-current characteristic of the DC shunt motor lies with respect to DC cumulative compound motor (assume current greater than full load current)?

- Can be represented by the same curve
- Above
- Below
- Cannot be determined

**12. **DC compound motor can be started on ______

- Full Load
- No-Load
- Medium Load
- None of the above

**13. **Flywheel is used with DC compound motor to reduce the peak demand by the motor, compound motor has to be _____________

- Level compounded
- Under compounded
- Cumulatively compounded
- Differentially compounded

**14. **Torque Current characteristics of the cumulative compound DC motor is ________

- Lies above shunt motor characteristic
- Lies below shunt motor characteristic
- Lies above of series and shunt motor characteristic both
- Lies between of series and shunt motor characteristic both

**15. **Torque of the cumulative compound DC motor is ________

- Lies above shunt motor characteristic
- Lies below shunt motor characteristic
- Lies above of series and shunt motor characteristic both
- Lies between of series and shunt motor characteristic both

**16. **For strong series field, speed-torque characteristic of cumulative compound motor lies __________

- Above series motor characteristic if current is less than full load current
- Above shunt motor characteristic if current is less than full load current
- Below series motor characteristic if current is more than full load current
- Below series motor characteristic if current is less than full load current

**17. **DC motor is to drive a load that is almost zero for a certain part of the load cycle and peak value for short duration. We will select __________

- Series motor
- Shunt motor
- Compound motor
- Any DC motors

**18. **What will happen if the series field of a cumulative compound motor is short-circuited?

- Net flux will increase
- Speed will increase
- Speed will remain constant
- Speed will decrease

**19. **______ motors have applications with loads that require Pulsating Load.

- DC Series
- DC Shunt
- Cumulative Compound
- Differentially compound