HEAVY DUTY DIESEL (MICHIGAN SOS
TEST STUDY) 2 (35 QUESTIONS)
oOn a typical diesel subsystem, what system would most likely be used at the lowest pressure when the
engine is running? - Primary filter
Where is the secondary fuel filter usually located? - on the side of the transfer pump
Besides fue4l storage, the fuel tank may play an important role in a high-flow fuel system as a: - Heat
exchanger
What could be used to test the low-pressure side of a typical diesel fuel subsystem for inlet restriction? -
Negative pressure gauge
Which of the following should fuel subsystem charging pressures be measured with?
a.) Diagnostic sight glass
b.) H20 manometer
c.) HG manometer
d.) Accurate pressure gauge - D
What type of fuel transfer pump is more commonly used by electronically managed engine/fuel
systems? - Gear pumps
What type of pumping principle is used by a typical hand primer pump? - Single acting plunger
Charging pressure rise is usually directly related to what? - Increased RPM
What is the purpose of the air inlet system? - To provide clean air to engine and optimize air flow
What is the function of the charge air cooler? - to lower the temperature of incoming air before it enters
the cylinders
Where does air flow begin? - Intake Air duct
What component increases the volume of air entering the engine?
a.) Air filter
b.) Charge air cooler
c.) Turbocharger
d.) Throttle body - Turbocharger
What drives the turbocharger? - Hot expanding exhaust gases
What can reduce the possibility of turbocharger bearing damage?
TEST STUDY) 2 (35 QUESTIONS)
oOn a typical diesel subsystem, what system would most likely be used at the lowest pressure when the
engine is running? - Primary filter
Where is the secondary fuel filter usually located? - on the side of the transfer pump
Besides fue4l storage, the fuel tank may play an important role in a high-flow fuel system as a: - Heat
exchanger
What could be used to test the low-pressure side of a typical diesel fuel subsystem for inlet restriction? -
Negative pressure gauge
Which of the following should fuel subsystem charging pressures be measured with?
a.) Diagnostic sight glass
b.) H20 manometer
c.) HG manometer
d.) Accurate pressure gauge - D
What type of fuel transfer pump is more commonly used by electronically managed engine/fuel
systems? - Gear pumps
What type of pumping principle is used by a typical hand primer pump? - Single acting plunger
Charging pressure rise is usually directly related to what? - Increased RPM
What is the purpose of the air inlet system? - To provide clean air to engine and optimize air flow
What is the function of the charge air cooler? - to lower the temperature of incoming air before it enters
the cylinders
Where does air flow begin? - Intake Air duct
What component increases the volume of air entering the engine?
a.) Air filter
b.) Charge air cooler
c.) Turbocharger
d.) Throttle body - Turbocharger
What drives the turbocharger? - Hot expanding exhaust gases
What can reduce the possibility of turbocharger bearing damage?
