CDC X2T35X Exam Already Graded A+ Latest Update
2024-2025
How does an automatic transmission oil cooler work? - ANSWER>>The transmission oil
cooler is a small tank enclosed in one of the main radiator tanks. Since the transmission
fluid is hotter than the engine coolant, heat is removed from the fluid as it passes
through the radiator and cooler.
List the four functions of the radiator cap. - ANSWER>>(1) Seals the top of the radiator
filler neck to prevent leakage.
(2) Pressurizes the system to raise the boiling point of coolant.
(3) Relieves excess pressure to protect against system damage.
(4) Allows coolant flow between the radiator and the coolant reservoir (in closed
systems).
Why is the radiator shroud used? - ANSWER>>It helps ensure that the fan pulls air
through the radiator. Without it, the engine could overheat.
List four functinons of antifreeze. - ANSWER>>(1) Prevents winter freeze up.
(2) Prevents rust and corrosion.
(3) Lubricates the water pump.
(4) Cools the engine.
How is a block heater helpful with a diesel engine. - ANSWER>>The block heater keeps
the engine warm when the vehicle is not being used. It can be helpful with diesel
engines because diesel engines are harder to start in cold weather.
A hybrid vehicle cooling system removes heat from what three main electric powertrain
components? - ANSWER>>(1) HV battery
(2) HV PCM
(3) Motor-generator
, An engine's operating temperature is usually between? - ANSWER>>180F and 210F
When a thermostat is closed, which of these permits coolant circulation through the
engine?
(A) Bypass hose
(B) Bypass valve
(C) Both
(D) None - ANSWER>>(C) Both
Supercharger cooling systems are being discussed, Technician A says that hot air
carries more oxygen for combustion than an equal amount of cooler air. Technician B
says that such and a system often uses its own electric pump, hoses, and radiator to
pump cool antifreeze through the supercharger intercooler. Who is right? -
ANSWER>>B only
List seven items to look for when performing a visual inspection on a cooling system. -
ANSWER>>(1) Coolant Leaks.
(2) Loose or missing fan belt.
(3) Low coolant level.
(4) Abnormal water pump noises.
(5) Leaves and debris covering the outside of the radiator.
(6) Coolant in the oil (oil look white and milky).
(7) Combustion leakage into the coolant (air bubbles in coolant).
What can happen if you remove a radiator cap with the coolant at operating
temperature? - ANSWER>>The pressure release can make the coolant begin to boil
and expland into steam vapor. Boiling coolant could spurt out of the filler neck, causing
severe burns.
A _______ test checks for the presence of combustion gases in the engine coolant,
indicating an engine problem. - ANSWER>>Combustion leak.
2024-2025
How does an automatic transmission oil cooler work? - ANSWER>>The transmission oil
cooler is a small tank enclosed in one of the main radiator tanks. Since the transmission
fluid is hotter than the engine coolant, heat is removed from the fluid as it passes
through the radiator and cooler.
List the four functions of the radiator cap. - ANSWER>>(1) Seals the top of the radiator
filler neck to prevent leakage.
(2) Pressurizes the system to raise the boiling point of coolant.
(3) Relieves excess pressure to protect against system damage.
(4) Allows coolant flow between the radiator and the coolant reservoir (in closed
systems).
Why is the radiator shroud used? - ANSWER>>It helps ensure that the fan pulls air
through the radiator. Without it, the engine could overheat.
List four functinons of antifreeze. - ANSWER>>(1) Prevents winter freeze up.
(2) Prevents rust and corrosion.
(3) Lubricates the water pump.
(4) Cools the engine.
How is a block heater helpful with a diesel engine. - ANSWER>>The block heater keeps
the engine warm when the vehicle is not being used. It can be helpful with diesel
engines because diesel engines are harder to start in cold weather.
A hybrid vehicle cooling system removes heat from what three main electric powertrain
components? - ANSWER>>(1) HV battery
(2) HV PCM
(3) Motor-generator
, An engine's operating temperature is usually between? - ANSWER>>180F and 210F
When a thermostat is closed, which of these permits coolant circulation through the
engine?
(A) Bypass hose
(B) Bypass valve
(C) Both
(D) None - ANSWER>>(C) Both
Supercharger cooling systems are being discussed, Technician A says that hot air
carries more oxygen for combustion than an equal amount of cooler air. Technician B
says that such and a system often uses its own electric pump, hoses, and radiator to
pump cool antifreeze through the supercharger intercooler. Who is right? -
ANSWER>>B only
List seven items to look for when performing a visual inspection on a cooling system. -
ANSWER>>(1) Coolant Leaks.
(2) Loose or missing fan belt.
(3) Low coolant level.
(4) Abnormal water pump noises.
(5) Leaves and debris covering the outside of the radiator.
(6) Coolant in the oil (oil look white and milky).
(7) Combustion leakage into the coolant (air bubbles in coolant).
What can happen if you remove a radiator cap with the coolant at operating
temperature? - ANSWER>>The pressure release can make the coolant begin to boil
and expland into steam vapor. Boiling coolant could spurt out of the filler neck, causing
severe burns.
A _______ test checks for the presence of combustion gases in the engine coolant,
indicating an engine problem. - ANSWER>>Combustion leak.
