COMPETENCE 7 – Maintenance and Repair of Electronics and Electrical Equipment
#1. If all three ground-detection lamps continue to burn at equal intensity after the test button is depressed and released, which of the listed conditions is indicated?
Incorrect!
#2. How would you increase the frequency of an operating AC generator?
Incorrect!
#3. If a magnetic controller relay fails to drop out when the coil voltage is removed from the relay, what is the probable cause?
Incorrect!
#4. If many turns of an alternating current coil for a contactor become short circuited, what will happen to the coil?
Incorrect!
#5. If a short circuit in the armature of a DC motor occurs what would be the result?
Incorrect!
#6. If a DC motor runs faster than designed, with all other conditions being normal, what could be the possible cause?
Incorrect!
#7. If an electric motor fails to start, what should you check FIRST?
Incorrect!
#8. If field excitation is suddenly lost to an alternator operating in parallel with another alternator, what will happen to the alternator that has experienced a loss of field excitation?
Incorrect!
#9. If the centrifugal switch or relay used for cutting out the starting winding of a split-phase induction motor fails to open once the motor is in operation, what will be the result?
Incorrect!
#10. Humming or buzzing of electric contacts is a symptom of what condition?
Incorrect!
#11. Hysteresis is one cause of electrical power loss associated with electricity generation equipment. What phenomenon results in hysteresis?
Incorrect!
#12. If an unloaded DC compound motor’s shunt field were weakened by excessive rheostat resistance or by an open circuit, how would the motor respond?
Incorrect!
#13. If the excitation of an alternator operating in parallel is decreased below normal and the other above normal, what will be the result on the alternator with the excitation decreased below normal?
Incorrect!
#14. If the contacts of a motor starter or controller fail to drop out when the ’stop’ button is depressed, what could be the cause?
Incorrect!
#15. If a magnetic controller contact fails to pick up when the operating coil is energized, what could be one possible cause?
Incorrect!
There are 15 questions for the actual examination for Competence 7 for OIC-EW with a passing rate of 70%. This means that you are only allowed to make 4 mistakes.
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