ABYC PRACTICE QUESTIONS EXAM
WITH CORRECT QUESTIONS AND
ANSWERS 2025
FALSE. End fittings introduce the possibility of high resistance. TE-4, Conductors - CORRECT-
ANSWERS********A sailboat's rigging is considered a reliable path to ground for lightning?
T/F?
Spark igntion Diesel Study Guide, Chapter 1 - CORRECT-ANSWERS********Gasoline
engines use what kind of ignition?
Compression ignition Diesel Study Guide, Chapter 1 - CORRECT-ANSWERS********Diesel
engines use what kind of ignition?
Gasoline engines Diesel Study Guide, Chapter 1 - CORRECT-ANSWERS********Spark
ignition are what kind of engines?
Diesel engines Diesel Study Guide, Chapter 1 - CORRECT-ANSWERS********Compression
ignition are what kind of engines?
750 degrees or more Diesel Study Guide, Chapter 1 - CORRECT-ANSWERS********How hot
must a atomized diesel get before combustion?
,TRUE, denser air has more oxygen molecules per cubic foot Diesel Study Guide, Chapter 1 -
CORRECT-ANSWERS********Cooler air is denser than ambient temperature? T/F?
A. The intake stroke only brings air into the cylinder. Diesel Study Guide, Chapter 1 -
CORRECT-ANSWERS********"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 - CORRECT-ANSWERS********What is the tool
to check engine back-pressure?
TRUE Diesel Study Guide, Chapter 2 - CORRECT-ANSWERS********When 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 - CORRECT-ANSWERS********"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 - CORRECT-
ANSWERS********"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."
WITH CORRECT QUESTIONS AND
ANSWERS 2025
FALSE. End fittings introduce the possibility of high resistance. TE-4, Conductors - CORRECT-
ANSWERS********A sailboat's rigging is considered a reliable path to ground for lightning?
T/F?
Spark igntion Diesel Study Guide, Chapter 1 - CORRECT-ANSWERS********Gasoline
engines use what kind of ignition?
Compression ignition Diesel Study Guide, Chapter 1 - CORRECT-ANSWERS********Diesel
engines use what kind of ignition?
Gasoline engines Diesel Study Guide, Chapter 1 - CORRECT-ANSWERS********Spark
ignition are what kind of engines?
Diesel engines Diesel Study Guide, Chapter 1 - CORRECT-ANSWERS********Compression
ignition are what kind of engines?
750 degrees or more Diesel Study Guide, Chapter 1 - CORRECT-ANSWERS********How hot
must a atomized diesel get before combustion?
,TRUE, denser air has more oxygen molecules per cubic foot Diesel Study Guide, Chapter 1 -
CORRECT-ANSWERS********Cooler air is denser than ambient temperature? T/F?
A. The intake stroke only brings air into the cylinder. Diesel Study Guide, Chapter 1 -
CORRECT-ANSWERS********"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 - CORRECT-ANSWERS********What is the tool
to check engine back-pressure?
TRUE Diesel Study Guide, Chapter 2 - CORRECT-ANSWERS********When 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 - CORRECT-ANSWERS********"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 - CORRECT-
ANSWERS********"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."
