ABYC Diesel Engine Certification Exam with complete solutions

B. 15 inches Based on ABYC standards, minimum spacing between hull vent openings and fuel fill or vent fittings should be: A. 9 inches B. 15 inches C. 24 inches D. 36 inches D. 36% The thermal efficiency of a diesel engine is such that typical heat converted to useful power is approximately _______% of the total heat A. 22 B. 45 C. 15 D. 36 Brainpower Read More A. The diesel intake stroke only brings air into the cylinder One of the primary differences between the gasoline engine four stroke cycle and the diesel four-stroke cycle is: A. The diesel intake stroke only brings air into the cylinder B. The compression ratio of the diesel engine is much lower than the same sized gasoline engine C. Fuel gets atomized by the high heat with a diesel engine D. The diesel fuel is more volatile than the gasoline C. Lower engine room temperature. Temperature controlled engine room exhaust blowers in diesel powered boat are primarily used to: A. heat the boats cabin B. ventilate the boats fire suppression system C. lower engine room temperature D. reduce exhaust back pressure B. Heat With some diesels there may be a need to ________ incoming air to the combustion chambers to assist in cold starting A. Pressurize B. heat C. humidify D. atomize D. Prevent excessive back pressure In setting up a piping system for exhaust gases, the number of sharp bends should be kept to a minimum to A. raise exhaust gas temperature B. permit use of a larger diameter pipe C. eliminate the need for a silencer D. prevent excessive exhaust back-pressure D. US Coast Guar