1. The principle of operation and the role of the oil mist detector in the crankcase.

2. Roles of the current transformer.

3. DG and ME protections.

4. Critical ship equipment.

5. How does the engine rotate and who and how does it operate (refers to slipping)?Explain the principle of operation of the unified motor overload protection device?

6. Explain the principle of operation of the automatic power switching device UPP-1?

7. Explain the need for motor overload protection?

8. Explain how the motor is protected against overload by the traditional method. What are the disadvantages of such protection?

9. Explain the principles laid down in modern systems for protecting motors against overload?

10. Explain the concepts of motor protection against overload with direct temperature control.

11. Explain the principle of operation of the ship insulation resistance monitoring devices (electron).

12. Explain the principle of the organization of the operation of the ship insulation resistance monitoring devices?

13. Converters, their role.

14. How to change the speed of an electric motor (3 methods).

15. Navigation devices.

16. Main switchboard protections.

17. Boiler protections.

18. Explain the operation of the light signaling device?

19. What is the need to protect the motors from unacceptable voltage reduction, how ?

20. Explain how electric motors are protected against unacceptable voltage reduction with a voltage relay. At what parameters of the contactors is this protection assigned to the voltage relay?

21. What are the principles laid down in modern systems for protecting electric motors against over-current

22. Explain how electric motors are protected against unacceptable voltage reduction by means of contactors. What parameters should a contactor have to be able to realize this protection??

23. Explain how protection against unacceptable reduction of electric motors of responsible consumers is implemented?

24. Explain how electric motors are protected from external short circuit, how are they organized?

25. Protection systems.

26. Known types of breakers.

27. Types of fuses.

28. Difference between contactor and relay.

29. In what situations does ME stop.

30. Explain how generator overload protection is organized?

31. Explain how the protection of generators against reverse power is organized?

32. Explain how protection of generators against unacceptable voltage reduction is organized?

33. Explain how the current settings of the circuit breakers are organized when organizing selective protection.

34. Explain how the testing of circuit breakers is perform according to the maximum switching capacity.

35. Explain how is the (detuning) of the protection relay against unacceptable undervoltage reduction due to a short circuit?

36. Draw the protective characteristics of the installation machines and selective machines with a fixed time delay

37. Draw the protective characteristics of the generator machines with adjustable time delay.

38. Explain the principle of operation of the multivibrator of the light signaling device.

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