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EOPA Study Materials | Questions & Answers (100 %Score) Latest Updated 2024/2025 Comprehensive Questions A+ Graded Answers | 100% Pass
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EOPA Study Materials | Questions & Answers (100 %Score) Latest Updated 2024/2025 Comprehensive Questions A+ Graded Answers | 100% Pass

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  • August 3, 2024
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  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • eopa study materials questions answers 100 s

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EOPA Study Materials | Questions & Answers (100 %Score) Latest Updated 2024/2025
Comprehensive Questions A+ Graded Answers | 100% Pass


engine - A(n) _____ is a device that changes the chemical energy in fuel to mechanical energy.



cylinder - The bore in which a piston travels



piston - An engine part that slides back and forth in a cylinder



connecting rod - An engine part that links a piston to the crankshaft



crankshaft - An engine part that converts reciprocating motion created by the engine pistons to rotating
motion



intake - the cylinder must be filled with a flammable mixture of air and fuel during this event that occurs
in an internal combustion engine



compression - the mixture of air and fuel must be compressed into a smaller space and then ignited by a
spark



power - once the air and fuel mixture is ignited, the force of expanding, burning mixture can be used for
power production



exhaust - the burned mixture must be removed from the cylinder during this event that occurs in an
internal combustion engine



stroke - A _____ refers to the full travel of the piston in the cylinder.



intake stroke - the first of four strokes, the intake valve opens, the exhaust valve closes, and the piston
travels downward in the cylinder until it reaches bottom dead center.

, compression stroke - both valves are closed. The air and fuel that entered the cylinder during the first
stroke are being compressed into a small space between the combustion chamber of the cylinder head
and the top of the piston.



power stroke - the piston will be pushed down by the expanding gases created by the burning of the air
and fuel mixture. Both valves remain closed until the piston reaches bottom dead center.



exhaust stroke - the exhaust valve opens and the piston pushes the burned air and fuel out of the open
valve as it moves up to the tip of the cylinder.



flywheel - A _____ is a device used to store rotational energy.



camshaft - The _____ is a lobed shaft that is used to open and close the valves.



differences between a two-stroke and four-stroke engine cycle - The two-stroke engine completes the
cycle in one revolution of the crankshaft, whereas the four-stroke engine needs two revolutions of the
crankshaft to complete a cycle. Oil must also be mixed with the fuel in a two-stroke engine. Four-stroke
engines have an oil reservoir.



reed valves - In some two-stroke engines, the _____ prevent the air-fuel mixture from being forced back
out through the intake port during the power stroke.



cylinder head - The _____ seals the combustion chamber



valve timing - ____________ is accomplished through through the rotary motion of the camshaft.



venturi - A carburetor jet is a tiny hole in the _____, which is a narrow point in the carburetor throat.



running lean - the engine is not receiving enough fuel.



ignition coil - A(n) _____ is a device that transforms low-voltage current into high-voltage current that
can cause a spark to ignite the fuel and air mixture in an engine.

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