ABYC Practice Questions and Answers Fully Solved

ABYC Practice Questions

FALSE. End fittings introduce the possibility of high resistance. TE-4, Conductors -
answer A sailboat's rigging is considered a reliable path to ground for lightning? T/F?

Spark ignition Diesel Study Guide, Chapter 1 - answer Gasoline engines use what kind
of ignition?

Compression ignition Diesel Study Guide, Chapter 1 - answer Diesel engines use what
kind of ignition?

Gasoline engines Diesel Study Guide, Chapter 1 - answer Spark ignition are what kind
of engines?

Diesel engines Diesel Study Guide, Chapter 1 - answer Compression ignition are what
kind of engines?

750 degrees or more Diesel Study Guide, Chapter 1 - answer How hot must a atomized
diesel get before combustion?

TRUE, denser air has more oxygen molecules per cubic foot Diesel Study Guide,
Chapter 1 - answer Cooler air is denser than ambient temperature? T/F?

A. The intake stroke only brings air into the cylinder. Diesel Study Guide, Chapter 1 -
answer “One of the primary differences between the gasoline-fueled engine four-stroke
cycle and the diesel four-stroke cycle is:
A. The 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."

Manometer Diesel Study Guide, Chapter 2 - answerWhat is the tool to check engine
back-pressure?

TRUE Diesel Study Guide, Chapter 2 - answerWhen checking engine back-pressure,
the engine must be under load to get a valid reading. T/F?

C. 200mV Diesel Study Guide, Chapter 2, pg 23 - answer"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

, B. 2000mV
C. 200mV
D. 2V"

D. prevent excessive exhaust back-pressure. Diesel Study Guide, Chapter 2 -
answer"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."

C. Siphon break. Diesel Study Guide, Chapter 2 - answer"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?
A. Manometer.
B. Flow diverter.
C. Siphon break.
D. Flapper valve."

B. Technician B. Diesel Study Guide, Chapter 2 - answer"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?
A. Technician A.
B. Technician B.
C. Both technicians are correct.
D. Neither technician is correct."

A clear hose Diesel Study Guide, Chapter 3 - answerWhat is a good trick to see if a
seacock is suffering from aeration?

B. Milky Diesel Study Guide, Chapter 3 - answer"Water in oil will cause the oil to look:
A. Dark black
B. Milky
C. Translucent
D. Fluffy brown"

False. Diesel Study Guide, Chapter 3 - answerAlways use Teflon tape on the threads of
pencil zincs. T/F?

Wire reinforced Diesel Study Guide, Chapter 3 - answerHose from the seacock to the
sea strainer should be ____ ________.

C. checking all downstream components for impeller pieces Diesel Study Guide,
Chapter 3 - answer"Replacement of a seawater pump impeller should normally include: