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ASVAB Auto and Shop information
Questions and Correct Answers/ Latest
Update / Already Graded
What does the Internal Combustion engine burn?
Ans: Mixture of Gas and Air
(the fuel mixture)
What are the 4 strokes that make up a cycle?
(in car engine)
Ans: 1. Intake
2. Compression
3. Power
4. Exhaust
This valve opens as the connecting rod pulls the piston down, drawing
the gas/air mix into the cylinder
Ans: Intake
The valves are closed. The connecting rod pushes the piston up,
compressing gas/air mix
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Ans: Compression
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
Ans: Power
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.
Ans: Exhaust
The name for cylinders that are arranged in one row
Ans: Inline
The name for cylinders that are arranged in two rows
Ans: V
Most people refer to engines as four-cycle engines but this is false;
what are they really called?
Ans: Four-stroke, one-cycle engine
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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)
Ans: Tachometer
What must happen in order for the cycle to happen at all?
Ans: Fuel must be properly mixed with air and transported
within the cylinder at the proper time
___ 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
Ans: Carburetors
___ have replaced carburetors on newer cars to perform the air/fuel
mixture function.
Ans: Fuel Injectors
The ___ acts as the fuel-dispensing nozzle. It injects liquid fuel directly
in to the engine's air stream.
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(In almost all cases it requires an external pump)
Ans: Fuel Injector
EFI computer stands for ___?
Ans: Electronic Fuel Injection computer
What does the EFI computer do?
Ans: 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
___ is mechanically connected to the carburetor
OR
___ is electronically connected to the EFI computer
Ans: Throttle
What does a Throttle do?
Ans: 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
All rights reserved © 2025/ 2026 |
ASVAB Auto and Shop information
Questions and Correct Answers/ Latest
Update / Already Graded
What does the Internal Combustion engine burn?
Ans: Mixture of Gas and Air
(the fuel mixture)
What are the 4 strokes that make up a cycle?
(in car engine)
Ans: 1. Intake
2. Compression
3. Power
4. Exhaust
This valve opens as the connecting rod pulls the piston down, drawing
the gas/air mix into the cylinder
Ans: Intake
The valves are closed. The connecting rod pushes the piston up,
compressing gas/air mix
All rights reserved © 2025/ 2026 |
, Page |2
Ans: Compression
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
Ans: Power
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.
Ans: Exhaust
The name for cylinders that are arranged in one row
Ans: Inline
The name for cylinders that are arranged in two rows
Ans: V
Most people refer to engines as four-cycle engines but this is false;
what are they really called?
Ans: Four-stroke, one-cycle engine
All rights reserved © 2025/ 2026 |
, Page |3
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)
Ans: Tachometer
What must happen in order for the cycle to happen at all?
Ans: Fuel must be properly mixed with air and transported
within the cylinder at the proper time
___ 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
Ans: Carburetors
___ have replaced carburetors on newer cars to perform the air/fuel
mixture function.
Ans: Fuel Injectors
The ___ acts as the fuel-dispensing nozzle. It injects liquid fuel directly
in to the engine's air stream.
All rights reserved © 2025/ 2026 |
, Page |4
(In almost all cases it requires an external pump)
Ans: Fuel Injector
EFI computer stands for ___?
Ans: Electronic Fuel Injection computer
What does the EFI computer do?
Ans: 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
___ is mechanically connected to the carburetor
OR
___ is electronically connected to the EFI computer
Ans: Throttle
What does a Throttle do?
Ans: 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
All rights reserved © 2025/ 2026 |
