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Exam (elaborations)

ASVAB Auto and Shop information Questions And Correct Answers

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  • ASVAB
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  • ASVAB

ASVAB Auto and Shop information Questions And Correct Answers Mixture of Gas and Air (the fuel mixture) - answerWhat does the Internal Combustion engine burn? 1. Intake 2. Compression 3. Power 4. Exhaust - answerWhat are the 4 strokes that make up a cycle? (in car engine) Intake - answerTh...

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  • October 15, 2024
  • 14
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • ASVAB
  • ASVAB
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sirjoel
©SIRJOEL EXAM SOLUTIONS
10/14/2024 11:14 PM


ASVAB Auto and Shop information
Questions And Correct Answers


Mixture of Gas and Air

(the fuel mixture) - answer✔What does the Internal Combustion engine burn?
1. Intake
2. Compression
3. Power

4. Exhaust - answer✔What are the 4 strokes that make up a cycle?
(in car engine)

Intake - answer✔This valve opens as the connecting rod pulls the piston down, drawing the
gas/air mix into the cylinder

Compression - answer✔The valves are closed. The connecting rod pushes the piston up,
compressing gas/air mix

Power - 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 - 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 - answer✔The name for cylinders that are arranged in one row

V - answer✔The name for cylinders that are arranged in two rows

Four-stroke, one-cycle engine - answer✔Most people refer to engines as four-cycle engines but
this is false; what are they really called?

Tachometer - answer✔Instrument in a vehicle the measures revolutions per minute; rpm

, ©SIRJOEL EXAM SOLUTIONS
10/14/2024 11:14 PM
(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 -
answer✔What must happen in order for the cycle to happen at all?

Carburetors - 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 - answer✔___ have replaced carburetors on newer cars to perform the air/fuel
mixture function.

Fuel Injector - 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 - 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 - answer✔What does the EFI computer do?

Throttle - answer✔___ 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 the throttle is advanced (opened). Thus, more fuel is
transported to the carburetor or fuel injectors. - answer✔What does a Throttle do?

Cooling system - answer✔What does the engine have because of the high temperature at which
fuel burns?
Water Jackets
Water Pump

Radiator - answer✔What are the 3 components of the engine's cooling system?

Water jackets - answer✔These surround the parts of the engine that reach the highest
temperatures

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