ABYC Diesel CORRECT QUESTIONS & SOLUTIONS(GRADED A)
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Course
ABYC Diesel
Institution
ABYC Diesel
A dirty air filter may cause:
-a decrease in fuel consumption
-white exhaust smoke
-a loss of power
-hotter exhaust temperatures - ANSWER a loss of power
Diesel exhaust systems produce small amounts of a dangerous gas. The gas is:
-carbon dioxide
-carbon monoxide
-sulfur dioxide
-hydroca...
ABYC Diesel CORRECT QUESTIONS &
SOLUTIONS(GRADED A)
A dirty air filter may cause:
-a decrease in fuel consumption
-white exhaust smoke
-a loss of power
-hotter exhaust temperatures - ANSWER a loss of power
Diesel exhaust systems produce small amounts of a dangerous gas. The gas is:
-carbon dioxide
-carbon monoxide
-sulfur dioxide
-hydrocarbon - ANSWER carbon monoxide
Which of the following type wet exhaust below the waterline?
-phase cancellation muffler
-waterlift
-surge tube
-inline muffler - ANSWER waterlift
Which of the following is typically performed as part of the routine maintenance inspection of the
seawater system?
-removal of the exhaust risers
-inspection of fresh water circulating pump for missing blades
-inspection of seacock for correct operation
-removal of engine exhaust manifold for internal inspection - ANSWER inspection of seacock for correct
operation
, During operation of the boat a technician notes an oil slick at the exhaust outlet. This lost likely indicates
that:
-the engine oil level is too high
-there is a leak in a raw water oil cooler
-incorrect engine oil was used
-the engine is running too lean - ANSWER there is a leak in the raw water oil cooler
During an inspection of a closed cooling system the technician finds oil mixed in with the cooling
solution. What step should be taken next?
-remove the heat exchanger for servicing
-identify and test any oil coolers in the system
-flush the cooling system
-take a sample of the coolant for testing - ANSWER identify and test any oil coolers in the system
An average charging circuit voltage on a 12-volt lead acid system is ________.
-7.5 to 8.4
-11.5 to 13.3
-13.8 to 14.8
-14.9 to 16.1 - ANSWER 13.8 to 14.8
Compared to gasoline, diesel fuel is more susceptible to
-microbe contamination
-algae growth contamination
-phase separation
-silicate dropout - ANSWER microbe contamination
The most frequent cause of diesel engine problems is due to
-improper air source
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