1
Asvab auto and shop information latest 2025 version
revised questions and verified correct answers
(accurate solutions) already passed highest test
graded a+.Mixture of Gas and Air
(the fuel mixture) - ...(ANSWERS)....What does the Internal Combustion engine
burn?
1. Intake
2. Compression
3. Power
4. Exhaust - ...(ANSWERS)....What are the 4 strokes that make up a cycle?
(in car engine)
Intake - ...(ANSWERS)....This valve opens as the connecting rod pulls the piston
down, drawing the gas/air mix into the cylinder
Compression - ...(ANSWERS)....The valves are closed. The connecting rod pushes
the piston up, compressing gas/air mix
Power - ...(ANSWERS)....The spar plug ignites the gas/air mix, forcing the piston
down. That pushes down on the connecting rod, turning the crankshaft; the
crankshaft turns the flywheel, which keeps the engine going
Exhaust - ...(ANSWERS)....The ___ valve opens as the connecting rod moves the
piston back up, pushing out the exploded gases. The valves are times, of course,
using pus rods attached to the camshaft.
Inline - ...(ANSWERS)....The name for cylinders that are arranged in one row
V - ...(ANSWERS)....The name for cylinders that are arranged in two rows
Four-stroke, one-cycle engine - ...(ANSWERS)....Most people refer to engines as
four-cycle engines but this is false; what are they really called?
, 2
Tachometer - ...(ANSWERS)....Instrument in a vehicle the measures revolutions
per minute; rpm
(e.g. when this displays 4,800 rpm, that means the engine is performing 4,800
cycles every minute)
Fuel must be properly mixed with air and transported within the cylinder at the
proper time - ...(ANSWERS)....What must happen in order for the cycle to happen
at all?
Carburetors - ...(ANSWERS)....___ are used (pre 1990) to mix the fuel and air
mechanically. As air moves quickly through this, it creates a vacuum, which draws
more and more fuel into the mixture
Fuel Injectors - ...(ANSWERS)....___ have replaced carburetors on newer cars to
perform the air/fuel mixture function.
Fuel Injector - ...(ANSWERS)....The ___ acts as the fuel-dispensing nozzle. It injects
liquid fuel directly in to the engine's air stream.
(In almost all cases it requires an external pump)
Electronic Fuel Injection computer - ...(ANSWERS)....EFI computer stands for ___?
Determines the amount of fuel entering the engine: receives information from
the sensors in the fuel, air, and exhaust system, and from that information, it
determines how much fuel the engine needs to operate at optimum levels -
...(ANSWERS)....What does the EFI computer do?
Throttle - ...(ANSWERS)....___ is mechanically connected to the carburetor
OR
___ is electronically connected to the EFI computer
Advancing (opening) the throttle causes more fuel to be transferred to the
carburetor or the fuel injectors. The accelerator (gas pedal) is connected to the
throttle by mechanical linkages. The harder you push on the gas pedal, the farther
, 3
the throttle is advanced (opened). Thus, more fuel is transported to the
carburetor or fuel injectors. - ...(ANSWERS)....What does a Throttle do?
Cooling system - ...(ANSWERS)....What does the engine have because of the high
temperature at which fuel burns?
Water Jackets
Water Pump
Radiator - ...(ANSWERS)....What are the 3 components of the engine's cooling
system?
Water jackets - ...(ANSWERS)....These surround the parts of the engine that reach
the highest temperatures
(engine cooling system)
Water Pump - ...(ANSWERS)....This circulates water through the water jackets
(engine cooling system)
Radiator - ...(ANSWERS)....(engine cooling system)
While the water circulates, it absorbs heat from the engine and then passes
through the ___, where outside air cools the water.
Antifreeze - ...(ANSWERS)....___ (a coolant) raises the boiling point of water
(which keeps water from boiling away) and lowers its freezing point (which keeps
the system from freezing up during cold weather)
Antifreeze - ...(ANSWERS)....___ is usually mixed with the water in an engine
cooling system
Oil Pump - ...(ANSWERS)....A ___ circulates oil through the engine; oil flows
through the crankshaft and connecting rods, lubricating it as it goes.
Friction & Heat - ...(ANSWERS)....Lubrication (from the oil pump) reduces ___,
which in turn reduces ___.
Asvab auto and shop information latest 2025 version
revised questions and verified correct answers
(accurate solutions) already passed highest test
graded a+.Mixture of Gas and Air
(the fuel mixture) - ...(ANSWERS)....What does the Internal Combustion engine
burn?
1. Intake
2. Compression
3. Power
4. Exhaust - ...(ANSWERS)....What are the 4 strokes that make up a cycle?
(in car engine)
Intake - ...(ANSWERS)....This valve opens as the connecting rod pulls the piston
down, drawing the gas/air mix into the cylinder
Compression - ...(ANSWERS)....The valves are closed. The connecting rod pushes
the piston up, compressing gas/air mix
Power - ...(ANSWERS)....The spar plug ignites the gas/air mix, forcing the piston
down. That pushes down on the connecting rod, turning the crankshaft; the
crankshaft turns the flywheel, which keeps the engine going
Exhaust - ...(ANSWERS)....The ___ valve opens as the connecting rod moves the
piston back up, pushing out the exploded gases. The valves are times, of course,
using pus rods attached to the camshaft.
Inline - ...(ANSWERS)....The name for cylinders that are arranged in one row
V - ...(ANSWERS)....The name for cylinders that are arranged in two rows
Four-stroke, one-cycle engine - ...(ANSWERS)....Most people refer to engines as
four-cycle engines but this is false; what are they really called?
, 2
Tachometer - ...(ANSWERS)....Instrument in a vehicle the measures revolutions
per minute; rpm
(e.g. when this displays 4,800 rpm, that means the engine is performing 4,800
cycles every minute)
Fuel must be properly mixed with air and transported within the cylinder at the
proper time - ...(ANSWERS)....What must happen in order for the cycle to happen
at all?
Carburetors - ...(ANSWERS)....___ are used (pre 1990) to mix the fuel and air
mechanically. As air moves quickly through this, it creates a vacuum, which draws
more and more fuel into the mixture
Fuel Injectors - ...(ANSWERS)....___ have replaced carburetors on newer cars to
perform the air/fuel mixture function.
Fuel Injector - ...(ANSWERS)....The ___ acts as the fuel-dispensing nozzle. It injects
liquid fuel directly in to the engine's air stream.
(In almost all cases it requires an external pump)
Electronic Fuel Injection computer - ...(ANSWERS)....EFI computer stands for ___?
Determines the amount of fuel entering the engine: receives information from
the sensors in the fuel, air, and exhaust system, and from that information, it
determines how much fuel the engine needs to operate at optimum levels -
...(ANSWERS)....What does the EFI computer do?
Throttle - ...(ANSWERS)....___ is mechanically connected to the carburetor
OR
___ is electronically connected to the EFI computer
Advancing (opening) the throttle causes more fuel to be transferred to the
carburetor or the fuel injectors. The accelerator (gas pedal) is connected to the
throttle by mechanical linkages. The harder you push on the gas pedal, the farther
, 3
the throttle is advanced (opened). Thus, more fuel is transported to the
carburetor or fuel injectors. - ...(ANSWERS)....What does a Throttle do?
Cooling system - ...(ANSWERS)....What does the engine have because of the high
temperature at which fuel burns?
Water Jackets
Water Pump
Radiator - ...(ANSWERS)....What are the 3 components of the engine's cooling
system?
Water jackets - ...(ANSWERS)....These surround the parts of the engine that reach
the highest temperatures
(engine cooling system)
Water Pump - ...(ANSWERS)....This circulates water through the water jackets
(engine cooling system)
Radiator - ...(ANSWERS)....(engine cooling system)
While the water circulates, it absorbs heat from the engine and then passes
through the ___, where outside air cools the water.
Antifreeze - ...(ANSWERS)....___ (a coolant) raises the boiling point of water
(which keeps water from boiling away) and lowers its freezing point (which keeps
the system from freezing up during cold weather)
Antifreeze - ...(ANSWERS)....___ is usually mixed with the water in an engine
cooling system
Oil Pump - ...(ANSWERS)....A ___ circulates oil through the engine; oil flows
through the crankshaft and connecting rods, lubricating it as it goes.
Friction & Heat - ...(ANSWERS)....Lubrication (from the oil pump) reduces ___,
which in turn reduces ___.
