Four-Stroke Engine Mechanics Quiz

Component responsible for admitting the fuel-air mixture into the engine cylinder.

Component responsible for releasing exhaust gases from the engine cylinder.

The sequence of events in an internal combustion engine, consisting of four strokes: intake, compression, power, and exhaust.

A type of internal combustion engine utilizing a rotating triangle-shaped piston instead of a reciprocating one.

The rotating shaft in a Wankel engine that the rotary piston orbits around.

A sequence of events that converts fuel into mechanical energy in an internal combustion engine.

The movement of the piston downward in the cylinder, drawing in a fuel-air mixture.

The piston moves upward, compressing the fuel-air mixture into a smaller space, raising its temperature and pressure.

The ignition of the compressed fuel-air mixture, causing a rapid expansion of gases that drives the piston downward.

The piston moves upward, pushing out the burnt exhaust gases from the combustion chamber.

The mechanism that converts linear motion of the piston into rotational motion of the crankshaft.

A rotating shaft with lobes that control the opening and closing of valves in an engine.

A system that delivers fuel to an engine by spraying it directly into the combustion chamber.

The piston's movement from the top (TDC) to the bottom (BDC) of the cylinder, or vice versa.

The point where the piston changes direction at the top of the cylinder.

The point where the piston changes direction at the bottom of the cylinder.

The process of burning fuel to create energy, typically involving a spark plug to ignite the fuel-air mixture.

The process of diesel engine combustion, where the injected fuel ignites within the hot, compressed air.

The timing of fuel injection, crucial in diesel engines, usually taking place around 10-20 degrees before Top Dead Center (TDC).

A critical aspect of diesel engine operation, where fuel burns quickly and efficiently to create power.

The approximate maximum temperature reached during diesel combustion, around 1700 degrees Celsius.

A key characteristic distinguishing diesel engines from gasoline engines, where ignition is triggered by compression heat rather than a spark.

The process of removing spent exhaust gases from a cylinder by the incoming intake air, enhancing efficiency.

An engine where cylinders are arranged in a circle around a central crankshaft.

The most common type of engine for large aircraft with reciprocating engines, despite its drawbacks.

An engine with cylinders arranged in a line, often horizontally.

An in-line engine with cylinders positioned below the crankshaft.

A major advantage of in-line engines, providing a slim profile that reduces air resistance.

An in-line engine with cylinders positioned below the crankshaft improves visibility for the pilot.

Compared to other engine types, in-line engines generally weigh more relative to their power output.

Cooling becomes challenging with larger in-line engines due to increased surface area exposed to air.

The standard configuration for reciprocating engine-powered aircraft due to its low weight, small size, and efficient cooling.

A numbering system used to identify specific engine models, with the first three digits representing the displacement in cubic inches (rounded to the nearest 10).

A letter code in an engine designation that indicates the type of power section and rating.

A number (1-9) in an engine designation that specifies the design type of the nose section.

A letter in an engine designation indicating the type of accessory section.

A number in an engine designation that indicates the type of counterweight application used with the crankshaft and the mode of vibration.

The final character in an engine designation, indicating the type of magneto used with the engine.

A dual magneto is indicated by the letter 'D' in the engine designation, signifying that the engine has two magnetos.