COMPETENCE 6 – Operate Electrical, Electronic and Control Systems
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#1. At high discharge rates, why are nickel-cadmium storage batteries superior to lead-acid batteries?
Incorrect!
#2. An increase in which of the listed conditions will increase the speed of a synchronous electric motor?
Incorrect!
#3. By what means does a molded-case circuit breaker provides protection against short circuits?
Incorrect!
#4. An insulation resistance test is performed on a particular piece of electric equipment. In addition to the resistance reading and date of test, what information listed below should be entered in the electrical log?
Incorrect!
#5. By what means is the frequency of an alternator adjusted from the main switchboard?
Incorrect!
#6. By what means is a constant output voltage from an AC generator maintained?
Incorrect!
#7. Capacitance is the property of an electric circuit opposing a change in what value of a circuit?
Incorrect!
#8. Besides voltage and frequency, what other factor must be the same when alternators are operating in parallel?
Incorrect!
#9. An electro-magnetic relay is most commonly used for what purpose?
Incorrect!
#10. Compared to the fuse being replaced, what should be the characteristic of the replacement fuse for a fuse that blows often?
Incorrect!
#11. By what means is the voltage of an operating AC turbo generator raised or lowered?
Incorrect!
#12. By what mechanism does a reverse-power relay prevent AC generator motorization?
Incorrect!
#13. Capacitors can be used in electric distribution systems to improve power factor. This is accomplished by seesawing energy between the capacitor and what device or devices?
Incorrect!
#14. As load is added to an AC generator provided with constant field excitation, the prime mover slows down. What immediate effect will this have on frequency and voltage?
Incorrect!
#15. Compared to conventional alternators, brushless alternators are designed to operate without the use of what?
Incorrect!
#16. Consider a series circuit employing two resistors. What is true about the resistance value of the second resistor compared to the first when the voltage drop across the first resistor is one half the source voltage?
Incorrect!
#17. By what means is the division of the reactive kVAR load between paralleled AC generators automatically controlled?
Incorrect!
#18. By what means is the rotation of a three-phase induction motor reversed?
Incorrect!
#19. Besides voltage regulation, what is a function of the voltage regulators used with AC generators?
Incorrect!
#20. Compared to the original wire, what will be the resistance of a replacement wire having twice the length and one-half the cross-sectional area of the original?
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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