This Blog is dedicated to all Marine Engineers preparing for MEO class IV exams. The questions covers all functions (Ship Stability, Marine Electro Technology, Marine Engineering Knowledge, Marine Safety and Marine engineering Practice).
2. In a diesel electric plant, raising the generator's field excitation will cause the DC propulsion motor to __________. increase in speed decrease in speed affect generator speed only affect main motor speed if done in conjunction with higher generator engine speeds
3. Which of the following statements best describes the material known as varnished cambric? Felted asbestos sealed with varnish. Cotton cloth coated with insulating varnish. Rubber insulation coated with a layer of tin. Paper impregnated with mineral oil, specially wrapped with nonmetallic tape, and coated with varnish.
4. A synchronous motor maintains synchronism with the rotating field because _____________. field strength varies directly with rotors Slip DC current applied to the rotor coils causes the rotor magnets to lock in with the rotating flux of the stator the stator poles are dragged around due to the flux created by the excitation current the stator flux rotates in the opposite direction
5. A low voltage protection circuit is used in electric motor starting equipment Trip circuit contractor when the motor overspeed due to low voltage Trip circuit contractor when the motor develops short circuit due to low voltage Allows the motor to restart automatically on restoration of voltage without manual resetting prevent motor from restarting automatically
Score = Correct answers:
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