ASVAB- Automotive Information Exam Questions with Verified Solutions Latest Version 2025 (Already
Passed)
Systems. - Answers Combinations of parts that work together to perform a particular function.
Engine System. - Answers Generate power to drive the vehicle's wheels & various accessories.
Combustion Systems. - Answers Comprise the fuel system, which ensures that correct amounts of air &
fuel are available for efficient combustion in the engine.
Ignition System. - Answers Generates & times the spark that initiates combustion.
Exhaust System. - Answers Forms a "pipeline" for waste gases to be removed from the engine & then
dissipated to the open atmosphere.
Electrical & Control System. - Answers Includes the electric system.
- starting, charging, lighting, brakes, suspension.
Chassis Systems. - Answers Made up of the drivetrain system, which transmits power from the engine to
the vehicle's drive wheels.
Internal Combustion Engine. - Answers Type of engine used in automobiles.
Combustion. - Answers Rapid burning of an air-fuel mixture.
Internal Combustion. - Answers fuel is burned internally & the resulting heat is used directly to the
power.
Types of Fuels. - Answers Gas, diesel fuel, propane, natural gas, & alcohol.
Present Elements Before Combustion. - Answers Air, fuel, & a heat source that can be used to ignite the
air-fuel mixture.
Chemical Energy. - Answers What internal combustion engines convert to.
Heat Energy. - Answers What chemical energy is converted to in the fuel & air.
Mechanical Energy. - Answers What heat energy is then converted into.
Engine Block. - Answers forms the framework for the engine cylinders & reciprocating assembly.
Piston. - Answers Cylindrically shaped object with a solid crown (top) that moves up & down in the
engine's cylinders.
Cylinder. - Answers Forms a guide for the piston to move in; allows the piston to move up & down as the
engine completes its cycle.
Piston Rings. - Answers Seal the piston to the cylinder & prevent combustion gases from leaking past.
, Oil Rings. - Answers Prevent oil from the engine crankcase from making its way into the combustion
chamber.
Wrist Pin. - Answers Connects the piston/wrist pin assembly to the engine's crankshaft.
Crankshaft. - Answers Converts the linear (straight line) motion of the piston into rotary motion, which
can then be used to power a vehicle or drive an accessory.
Cylinder Head. - Answers Located above the piston, it houses the combustion chamber, the intake &
exhaust valves, & the intake & exhaust ports.
Combustion Chambers. - Answers Located in the cylinder head directly above the piston, it is where the
actual combustion of the air-fuel mixture takes place.
Intake Valve. - Answers Allows the air-fuel mixture to be drawn into the combustion chamber.
Exhaust Valve. - Answers Allows waste gases to be removed from the combustion chamber.
Camshaft. - Answers Responsible for the opening & closing of the engine's intake & exhaust valves.
Four-Stroke Cycle. - Answers Takes four strokes of the piston to complete one cycle of events.
Top Dead Center (TDC). - Answers Stroke of piston movement from the top of its travel to in the
cylinder.
Bottom Dead Center (BDC). - Answers Piston movement from the bottom of its travel & goes back to the
TDC.
Intake Stroke. - Answers Where the four-stroke cycle begins.
Compression Stroke. - Answers Pistons start moving upward in the cylinder while both of the engine's
valves are closed.
Power Stroke. - Answers Flame further heats the gases in the combustion chamber & the resulting rapid
expansion of these gases pushes on the piston as it passes TDC & then continues downward on the third
stroke of the cycle.
Four-Stroke Cycle. - Answers Intake -> Compression -> Power ->Exhaust.
Exhaust Stroke. - Answers Pistons once again returns from BDC to TDC while the exhaust valve is open.
Cylinder Arrangement. - Answers Position of the various cylinders relative to each other.
Inline. - Answers All fo the engine's cylinders are lined up in a row.
Horizontally Opposed or Flat. - Answers Has all of the cylinders lying in a horizontal plane, with half of
the cylinders facing away from the other half & the crankshaft located between them.
Passed)
Systems. - Answers Combinations of parts that work together to perform a particular function.
Engine System. - Answers Generate power to drive the vehicle's wheels & various accessories.
Combustion Systems. - Answers Comprise the fuel system, which ensures that correct amounts of air &
fuel are available for efficient combustion in the engine.
Ignition System. - Answers Generates & times the spark that initiates combustion.
Exhaust System. - Answers Forms a "pipeline" for waste gases to be removed from the engine & then
dissipated to the open atmosphere.
Electrical & Control System. - Answers Includes the electric system.
- starting, charging, lighting, brakes, suspension.
Chassis Systems. - Answers Made up of the drivetrain system, which transmits power from the engine to
the vehicle's drive wheels.
Internal Combustion Engine. - Answers Type of engine used in automobiles.
Combustion. - Answers Rapid burning of an air-fuel mixture.
Internal Combustion. - Answers fuel is burned internally & the resulting heat is used directly to the
power.
Types of Fuels. - Answers Gas, diesel fuel, propane, natural gas, & alcohol.
Present Elements Before Combustion. - Answers Air, fuel, & a heat source that can be used to ignite the
air-fuel mixture.
Chemical Energy. - Answers What internal combustion engines convert to.
Heat Energy. - Answers What chemical energy is converted to in the fuel & air.
Mechanical Energy. - Answers What heat energy is then converted into.
Engine Block. - Answers forms the framework for the engine cylinders & reciprocating assembly.
Piston. - Answers Cylindrically shaped object with a solid crown (top) that moves up & down in the
engine's cylinders.
Cylinder. - Answers Forms a guide for the piston to move in; allows the piston to move up & down as the
engine completes its cycle.
Piston Rings. - Answers Seal the piston to the cylinder & prevent combustion gases from leaking past.
, Oil Rings. - Answers Prevent oil from the engine crankcase from making its way into the combustion
chamber.
Wrist Pin. - Answers Connects the piston/wrist pin assembly to the engine's crankshaft.
Crankshaft. - Answers Converts the linear (straight line) motion of the piston into rotary motion, which
can then be used to power a vehicle or drive an accessory.
Cylinder Head. - Answers Located above the piston, it houses the combustion chamber, the intake &
exhaust valves, & the intake & exhaust ports.
Combustion Chambers. - Answers Located in the cylinder head directly above the piston, it is where the
actual combustion of the air-fuel mixture takes place.
Intake Valve. - Answers Allows the air-fuel mixture to be drawn into the combustion chamber.
Exhaust Valve. - Answers Allows waste gases to be removed from the combustion chamber.
Camshaft. - Answers Responsible for the opening & closing of the engine's intake & exhaust valves.
Four-Stroke Cycle. - Answers Takes four strokes of the piston to complete one cycle of events.
Top Dead Center (TDC). - Answers Stroke of piston movement from the top of its travel to in the
cylinder.
Bottom Dead Center (BDC). - Answers Piston movement from the bottom of its travel & goes back to the
TDC.
Intake Stroke. - Answers Where the four-stroke cycle begins.
Compression Stroke. - Answers Pistons start moving upward in the cylinder while both of the engine's
valves are closed.
Power Stroke. - Answers Flame further heats the gases in the combustion chamber & the resulting rapid
expansion of these gases pushes on the piston as it passes TDC & then continues downward on the third
stroke of the cycle.
Four-Stroke Cycle. - Answers Intake -> Compression -> Power ->Exhaust.
Exhaust Stroke. - Answers Pistons once again returns from BDC to TDC while the exhaust valve is open.
Cylinder Arrangement. - Answers Position of the various cylinders relative to each other.
Inline. - Answers All fo the engine's cylinders are lined up in a row.
Horizontally Opposed or Flat. - Answers Has all of the cylinders lying in a horizontal plane, with half of
the cylinders facing away from the other half & the crankshaft located between them.
