Review for 2024-2025 Posttest GF

Which events occur during a four-stroke reciprocating engine cycle? Select all that apply. (7.A.1)

• A fuel and air mixture is converted into oxygen.
• A fuel and air mixture is sucked into the cylinder through the intake valve.
• A fuel and air mixture is ignited.
• A fuel and air mixture is ejected through the exhaust valve.
• A fuel and air mixture is compressed.

The _________ is the source of ignition in most reciprocating engines. (7.A.1)

• intake port
• spark plug
• cylinder head
• piston

Which of the following is NOT true of a cruise propeller? (7.A.2)

• They have a higher pitch.
• They produce lower RPM.
• They are more effective at higher power.
• They are more efficient for long-range cruising.

Which of the following would decrease the propeller pitch? (7.A.2)

• The pilot increases propeller RPM.
• The pilot makes a 1 G turn.
• The pilot uses the elevator to change the pitch.
• The pilot goes from a climb to cruising altitude.

A carburetor mixes fuel and air before sending it to the intake manifold while a fuel injection system delivers fuel and air __________. (7.A.3)

• directly to the intake valve
• directly to the cylinder
• directly to the fuel pump
• directly to the carburetor

In which situation would a pilot set the fuel-air mixture to a “full rich” position? (7.A.3)

• At high altitudes where the air density is high.
• At high altitudes where the air density is low.
• At low altitudes where the air density is low.
• At low altitudes where the air density is high.

__________ occurs when the correct fuel is used for the engine type and when the spark plugs are precisely timed. (7.A.4)

• Normal combustion
• Detonation
• Pre-ignition
• All of the above

When the engine is running, the __________ of the electrical current the spark plugs need to ignite the fuel-air mixture. (7.A.4)

• batteries provide all
• magnetos provide all
• ground power unit provides all
• magnetos provide some

What could be the source of a low oil pressure gauge reading? (7.A.4)

• Not enough oil in the sump
• Oil pump failure
• Leaking oil line
• All of the above

A supercharger _________. (7.A.5)

• adds no additional load on the engine
• is more efficient than a turbocharger
• has a lower throttle response than a turbocharger
• is less efficient than a turbocharger