ABYC Practice Questions and Correct Answers

ABYC Practice Questions and Correct Answers 100% Verified A sailboat's rigging is considered a reliable path to ground for lightning? T/F? - Correct Answer FALSE.End fittings introduce the possibility of high resistance. TE-4, Conductors Gasoline engines use what kind of ignition? - Correct Answer Spark igntion Diesel Study Guide, Chapter 1 Diesel engines use what kind of ignition? - Correct Answer Compression ignition Diesel Study Guide, Chapter 1 Spark ignition are what kind of engines? - Correct Answer Gasoline engines Diesel Study Guide, Chapter 1 Compression ignition are what kind of engines? - Correct Answer Diesel engines Diesel Study Guide, Chapter 1 How hot must a atomized diesel get before combustion? - Correct Answer 750 degrees or more Diesel Study Guide, Chapter 1 Cooler air is denser than ambient temperature? T/F? - Correct Answer TRUE, denser air has more oxygen molecules per cubic foot Diesel Study Guide, Chapter 1 "One of the primary differences between the gasoline-fueled engine four-stroke cycle and the diesel

four-stroke cycle is:

• The intake stroke only brings air into the cylinder.
• The compression ratio of the diesel engine is much lower than the same sized gasoline engine.
• Fuel gets atomized by the high heat with a diesel engine.
• The diesel fuel is more volatile than the gasoline." - Correct Answer A. The intake stroke only brings

air into the cylinder. Diesel Study Guide, Chapter 1 What is the tool to check engine back-pressure? - Correct Answer Manometer Diesel Study Guide, Chapter 2 1 / 2

When checking engine back-pressure, the engine must be under load to get a valid reading. T/F? - Correct Answer TRUE Diesel Study Guide, Chapter 2 "When choosing materials, we want them to be as close as possible on the Galvanic Series. What is the recommended separation of corrosion potential?

A. 200V

• 2000mV
• 200mV
• 2V" - Correct Answer C. 200mV Diesel Study Guide, Chapter 2, pg 23

"In setting up a piping system for exhaust gases, the number of sharp bends should be kept to a

minimum to:

• raise exhaust gas temperature.
• permit use of a larger diameter pipe.
• eliminate the need for a silencer.
• prevent excessive exhaust back-pressure." - Correct Answer D. prevent excessive exhaust back-

pressure. Diesel Study Guide, Chapter 2 "An engine equipped with an exhaust-mixing elbow is installed below the waterline. What device must be installed in the raw water discharge hose ahead of the mixing elbow?

• Manometer.
• Flow diverter.
• Siphon break.
• Flapper valve." - Correct Answer C. Siphon break. Diesel Study Guide, Chapter 2

"Upon inspection of the wet exhaust system, the technician notices that the exhaust hose is burned near the elbow. Technician A says that replacing the hose will correct the problem. Technician B says that the problem is most likely with the cooling system. Which technician is correct?

• Technician A.
• Technician B.
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