1 | Page
ASVAB AUTO AND SHOP INFORMATION UPDATED
EXAM 2026 100% PASS ASSURED
EXAMINATION SOLUTIONS
Mixture of Gas and Air
(the fuel mixture) - correct answer- What does
the Internal Combustion engine burn?
1. Intake
2. Compression
3. Power
4. Exhaust - correct answer- What are the 4
strokes that make up a cycle?
(in car engine)
Intake - correct answer- This valve opens as
the connecting rod pulls the piston down,
drawing the gas/air mix into the cylinder
Compression - correct answer- The valves are
closed. The connecting rod pushes the piston
up, compressing gas/air mix
,2 | Page
Power - correct answer- 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 - correct answer- 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 - correct answer- The name for
cylinders that are arranged in one row
V - correct answer- The name for cylinders
that are arranged in two rows
Four-stroke, one-cycle engine - correct
answer- Most people refer to engines as four-
cycle engines but this is false; what are they
really called?
,3 | Page
Tachometer - correct answer- 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 - correct answer- What must happen in
order for the cycle to happen at all?
Carburetors - correct answer- ___ 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 - correct answer- ___ have
replaced carburetors on newer cars to perform
the air/fuel mixture function.
, 4 | Page
Fuel Injector - correct answer- 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 - correct
answer- 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
- correct answer- What does the EFI computer
do?
Throttle - correct answer- ___ is mechanically
connected to the carburetor
OR
___ is electronically connected to the EFI
computer
ASVAB AUTO AND SHOP INFORMATION UPDATED
EXAM 2026 100% PASS ASSURED
EXAMINATION SOLUTIONS
Mixture of Gas and Air
(the fuel mixture) - correct answer- What does
the Internal Combustion engine burn?
1. Intake
2. Compression
3. Power
4. Exhaust - correct answer- What are the 4
strokes that make up a cycle?
(in car engine)
Intake - correct answer- This valve opens as
the connecting rod pulls the piston down,
drawing the gas/air mix into the cylinder
Compression - correct answer- The valves are
closed. The connecting rod pushes the piston
up, compressing gas/air mix
,2 | Page
Power - correct answer- 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 - correct answer- 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 - correct answer- The name for
cylinders that are arranged in one row
V - correct answer- The name for cylinders
that are arranged in two rows
Four-stroke, one-cycle engine - correct
answer- Most people refer to engines as four-
cycle engines but this is false; what are they
really called?
,3 | Page
Tachometer - correct answer- 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 - correct answer- What must happen in
order for the cycle to happen at all?
Carburetors - correct answer- ___ 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 - correct answer- ___ have
replaced carburetors on newer cars to perform
the air/fuel mixture function.
, 4 | Page
Fuel Injector - correct answer- 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 - correct
answer- 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
- correct answer- What does the EFI computer
do?
Throttle - correct answer- ___ is mechanically
connected to the carburetor
OR
___ is electronically connected to the EFI
computer
