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CEF Level 4 - Test & Answer Marine Engine Hit What are the causes of marine engine failures? Marine engine failure can be caused when there are any number of problems inside the engine. As one example, the piston rings are designed to seal oil in order to reduce friction. When they become worn or break down, it leads to leaks in the crankcase. Another example is when metal shavings accumulate in fuel injectors and clog them up, leading to poor performance or no performance at all. How do you prepare for a marine engine examination? The DCVLE establishes specific standards for training competency that include classroom hours per year and practical experience requirement hours per year. The competency must be learned within the first four years of employment. However, provisions are made for remedial training or supplementing an experience requirement. When you take a test on a marine engine, what do you need to bring with you? The DNV examiners will ask you to prepare and bring along some information about your engine and the vessel it's on. This is done to make sure that they understand how it works and can give accurate answers. They may also ask you to go out on your vessel and give them some open-ended practical questions regarding your engine and its operation. These types of activities make up the practical portion of the test, as opposed to having them sit in a classroom all day long. When you take a marine engine test, how much time do you have? The competency testing is made up of two parts: written and practical. Both the written and practical tests are similar in that they each take 45 minutes to 2 hours to complete. If the examiners ask you to prepare for a practical test, they will tell you what they want your boat to accomplish during this portion of the test. The duration may be anywhere from 30 minutes to over an hour, depending on how long it takes them to finish their testing and get out of your vessel. What kind of questions will be asked on a CEF examination? Most questions will be multiple-choice and related to the specific competencies pertaining to the engine. Other questions may include identification of a problem, followed by a list of possible solutions. What kind of warning signs do you look for in a marine engine? Many times when an engine is going bad, it will start to make strange noises, such as tapping or knocking. How often should you use your throttle in order to keep the engine in good condition? If your boat is equipped with an electronic throttle that can be set with a dash-mounted switch, then you should use the throttle at least once every 10 minutes. If your boat does not have this feature, then check the manual to find out how often you need to adjust the throttle. When should you run your engine at certain speeds? The engine's RPM should match the boat's speed. Speed should be adjusted according to how much fuel you are using at each speed. Why is it important to change out your spark plugs so often? You should have your spark plugs replaced about every 1,000 to 3,000 hours of operation. If you take the test first, then wait for guidance before doing this service. What causes your engine's backup alarm to sound off? An intermittent fault may lead to a backup alarm sounding off when the throttle is pulled out of idle and released. cfa1e77820