COMPETENCE 9 – Maintenance and Repair of Shipboard Machinery and Equipment
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#1. A ballast pump, with a capacity of 200 gpm, takes suction on a tank containing 300 long tons of sea water ballast. How much ballast will remain in the tank after pumping for one hour?
Incorrect!
#2. Boiler tube failures can result from:
Incorrect!
#3. An advantage of aluminum pistons, when compared to cast iron piston is:
Incorrect!
#4. Advances in metallurgy and improved methods of boiler tube fabrication has led to lighter tubes with wall thicknesses in the vicinity of 0.1 inches. A characteristic of these thin walled tubes is:
Incorrect!
#5. A refrigeration system compressor crankcase is sweating or unusually cold. This is an indication of:
Incorrect!
#6. A diesel engine exposed to widely varying ambient temperatures should use a lubricating oil with:
Incorrect!
#7. Babbitt is a metal alloy commonly used for lining:
Incorrect!
#8. Before doing any work on a hydraulic system equipped with accumulators, you should:
Incorrect!
#9. A wrench that completely surrounds a nut, or bolt head is a/an:
Incorrect!
#10. A diesel engine is warmed up and white vapor is noted in the exhaust, this could indicate:
Incorrect!
#11. A work piece has been mounted between centers and a test cut machined at each end to check alignment of the lathe centers. If the test cut on the tailstock end is deeper than the test cut on the headstock end, the tailstock must be moved:
Incorrect!
#12. Diesel engine piston seizure can be caused by.
Incorrect!
#13. Air leaks through the inner or outer casing of a boiler could result in:
Incorrect!
#14. Bluish smoke in the exhaust of an operating diesel engine can be caused by:
Incorrect!
#15. A roller bearing should normally be filled to what fraction of its space cavity?
Incorrect!
There are 15 questions for the actual examination for Competence 9 for OIC-EW with a passing rate of 70%. This means that you are only allowed to make 4 mistakes.
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