ABYC DIESEL EXAM QUESTIONS
WITH CORRECT DETAILED
ANSWERS
The first component to check when testing a 12-volt direct current starting circuit is the
-switch
-regulator
-battery
-wiring - Answer-battery
An average charging circuit voltage on a 12-volt lead acid system is ________.
-7.5 to 8.4
-11.5 to 13.3
-13.8 to 14.8
-14.9 to 16.1 - Answer-13.8 to 14.8
Compared to gasoline, diesel fuel is more susceptible to
-microbe contamination
-algae growth contamination
-phase separation
-silicate dropout - Answer-microbe contamination
The most frequent cause of diesel engine problems is due to
-improper air source
-engine improperly tuned
-fuel contamination
-high operating temperature - Answer-fuel contamination
A leak in piping connections between the turbocharger and engine intake manifold could
cause the engine to
-miss
-burn oil
-emit dark or black exhaust
-overheat - Answer-emit dark or black exhaust
What color smoke indicates excessive lube oil consumption in a diesel engine?
-blue
-white
-black
-gray - Answer-blue
WITH CORRECT DETAILED
ANSWERS
The first component to check when testing a 12-volt direct current starting circuit is the
-switch
-regulator
-battery
-wiring - Answer-battery
An average charging circuit voltage on a 12-volt lead acid system is ________.
-7.5 to 8.4
-11.5 to 13.3
-13.8 to 14.8
-14.9 to 16.1 - Answer-13.8 to 14.8
Compared to gasoline, diesel fuel is more susceptible to
-microbe contamination
-algae growth contamination
-phase separation
-silicate dropout - Answer-microbe contamination
The most frequent cause of diesel engine problems is due to
-improper air source
-engine improperly tuned
-fuel contamination
-high operating temperature - Answer-fuel contamination
A leak in piping connections between the turbocharger and engine intake manifold could
cause the engine to
-miss
-burn oil
-emit dark or black exhaust
-overheat - Answer-emit dark or black exhaust
What color smoke indicates excessive lube oil consumption in a diesel engine?
-blue
-white
-black
-gray - Answer-blue
