ABYC DIESEL CERTIFICATION EXAM WITH
VERIFIED QUESTIONS AND ANSWERS||
GUARANTEED PASS
A customer complains the engine idle is rough. Tech a says air in the fuel
system may be the cause. Tech b says the fuel shut off solenoid is not operating.
Who is right - ANSWER-Tech a
All times injection pumps are time to - ANSWER-As per engine service manual
What would happen if a high pressure fuel line was replaced with a line longer
than the original line - ANSWER-The timing would change because of the
extension of the fuel line
Modern battery testing techniques would include the use of a - ANSWER-
DVOM
When changing the primary fuel filter on a diesel engine, they technician
discovers black stringy material and the filter. The condition is most likely
caused by - ANSWER-Fuel contamination
Which fuel indicators are permitted by abyc standards h33 - ANSWER-
Dipstick, electronic center, sight gauge
A customer complains of white smoke only when the engine is cold. Technician
a says this could be caused by a faulty preheat device. Technician b says the
white smoke is caused by partially vaporized fuel. Who is right - ANSWER-
Both techs
, during a sea trial with mechanical Governor engines do you find the port engine
will not come up to full load, your notes show the high idle on the port engine
was 300 RPM below specs. The most likely answer is - ANSWER-Throttle
linkage adjustment
You are troubleshooting a sudden oil leak on a low our mechanical engine, the
customer complains that the dipstick is being pushed out of the block and oil is
leaking from the front crankshaft seal. The most likely answer is - ANSWER-
Plugged crankcase breather
The owner is complaining of low power. On a sea trial under full load you
measure exhaust gas temperature and boost pressure. You explain to the owner
you feel he might have a cylinder not putting out full power because -
ANSWER-The boost and temperature are both below specification
The owner is complaining of low top end speed. On a sea trial under a full load
you measure exhaust gas temperature and boost pressure. You explain to the
owner you feel the engine is overloaded based on - ANSWER-The boost is
lower than specification and the temperature is above specification
The operator of a diesel boat has a complaint of low power and no smoke the
technician should first check the - ANSWER-Fuel pressure
Add high-speed the raw water pressure shows heavy fluctuation as indicated on
a pressure gauge. A possible cause would be - ANSWER-Debris in the sea
water pick up
A ruptured oil cooler core may result in - ANSWER-Water in the oil system or
oil in the water system
Which of these should be done first to find the cause of a misfire on a diesel
engine - ANSWER-Find the misfiring cylinder
VERIFIED QUESTIONS AND ANSWERS||
GUARANTEED PASS
A customer complains the engine idle is rough. Tech a says air in the fuel
system may be the cause. Tech b says the fuel shut off solenoid is not operating.
Who is right - ANSWER-Tech a
All times injection pumps are time to - ANSWER-As per engine service manual
What would happen if a high pressure fuel line was replaced with a line longer
than the original line - ANSWER-The timing would change because of the
extension of the fuel line
Modern battery testing techniques would include the use of a - ANSWER-
DVOM
When changing the primary fuel filter on a diesel engine, they technician
discovers black stringy material and the filter. The condition is most likely
caused by - ANSWER-Fuel contamination
Which fuel indicators are permitted by abyc standards h33 - ANSWER-
Dipstick, electronic center, sight gauge
A customer complains of white smoke only when the engine is cold. Technician
a says this could be caused by a faulty preheat device. Technician b says the
white smoke is caused by partially vaporized fuel. Who is right - ANSWER-
Both techs
, during a sea trial with mechanical Governor engines do you find the port engine
will not come up to full load, your notes show the high idle on the port engine
was 300 RPM below specs. The most likely answer is - ANSWER-Throttle
linkage adjustment
You are troubleshooting a sudden oil leak on a low our mechanical engine, the
customer complains that the dipstick is being pushed out of the block and oil is
leaking from the front crankshaft seal. The most likely answer is - ANSWER-
Plugged crankcase breather
The owner is complaining of low power. On a sea trial under full load you
measure exhaust gas temperature and boost pressure. You explain to the owner
you feel he might have a cylinder not putting out full power because -
ANSWER-The boost and temperature are both below specification
The owner is complaining of low top end speed. On a sea trial under a full load
you measure exhaust gas temperature and boost pressure. You explain to the
owner you feel the engine is overloaded based on - ANSWER-The boost is
lower than specification and the temperature is above specification
The operator of a diesel boat has a complaint of low power and no smoke the
technician should first check the - ANSWER-Fuel pressure
Add high-speed the raw water pressure shows heavy fluctuation as indicated on
a pressure gauge. A possible cause would be - ANSWER-Debris in the sea
water pick up
A ruptured oil cooler core may result in - ANSWER-Water in the oil system or
oil in the water system
Which of these should be done first to find the cause of a misfire on a diesel
engine - ANSWER-Find the misfiring cylinder
