COMPETENCE 6 – Operate Electrical, Electronic and Control Systems
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#1. An AC generator operating in parallel loses its excitation without tripping the circuit breaker. What will be the result?
Incorrect!
#2. An accidental path of low resistance which by passes the intended resistance and passes an abnormal amount of current is known as what?
Incorrect!
#3. An AC generator produces 60 Hz at1800 RPM. If the generator speed is increased to 1830 RPM, what will happen to the frequency in Hz?
Incorrect!
#4. A single-phase split-phase induction motor will only start if you spin the rotor rapidly with the line switch closed. After starting, its speed fluctuates between very slow and half-speed. What motor component most likely is faulty?
Incorrect!
#5. A main switchboard for an AC electrical distribution system is different from a main switchboard for a DC distribution system in that it will be provided with which of the following meters?
Incorrect!
#6. A circuit that has a conductor in electrical contact with the hull of a ship is called what?
Incorrect!
#7. A generator has been exposed to water and needs to be checked before it can be operated safely. After performing the necessary procedures for drying the generator, what test needs to be performed before safe operation can resume?
Incorrect!
#8. A capacitor is to be tested with a digital multimeter set up to measure ohms. If the meter is connected to a shorted capacitor, how would the meter display respond?
Incorrect!
#9. A voltage amplifier has a calculated voltage gain of 10. Which statement correctly states the gain?
Incorrect!
#10. AC circuits can possess characteristics of resistance, inductance, and capacitance. In terms of units of measure, how is the capacitive reactance of the circuit expressed?
Incorrect!
#11. A single-phase capacitor-start induction motor starts, comes up to about 75% rated speed, slows down to a lower speed, and accelerates again. Where is the problem most likely to be?
Incorrect!
#12. An electrical connection between the wiring of an electric motor and its metal frame is known as what?
Incorrect!
#13. A current-carrying conductor making electrical contact with a wiring conduit will be indicated by a change on the switchboard from the norm. Assuming that the distribution system is an ungrounded system, what will change?
Incorrect!
#14. A capacitive AC circuit has fixed capacitors connected in series. If the line voltage remains constant, what factor can allow the capacitive reactance of the circuit to be varied?
Incorrect!
#15. An accidental path of low resistance by passing the intended path and allowing passage of an abnormally high amount of current is known as what?
Incorrect!
#16. An accidental ground in a motor can be defined as an electrical connection between the wiring of the motor and what other aspect of the motor installation?
Incorrect!
#17. According to the 46 CFR, Subchapter J (Electrical Engineering) requires which of the listed features to open the power circuit to a motor due to low voltage and re-close automatically when the voltage is restored to normal?
Incorrect!
#18. According to 46 CFR, Subchapter J(Electrical Engineering), the type of control circuit logic associated with auxiliaries vital to the operation of propulsion equipment, where automatic restart after a voltage failure would not create a hazard, is termed what?low voltage protection
Incorrect!
#19. A thermal-magnetic circuit breaker for a 300 KW alternator is rated at 500 amperes at full continuous load. Which of the following conditions will trip the breaker?
Incorrect!
#20. Ammeters and voltmeters used in sinusoidal AC power systems indicate which of the following values of the waveforms measured?
Incorrect!
There are 20 questions for the actual examination for Competence 6 for OIC-EW with a passing rate of 70%. This means that you are only allowed to make 6 mistakes.
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