Powerplant Quiz Sport Pilot

The uncontrolled firing of the fuel/air charge in advance of normal spark ignition is known as
combustion.
detonation.
pre-ignition.
A disconnected ground wire from a magneto to the ignition switch:
Will cause no observable problem in the aircraft’s operation or shutdown.
Will cause a fire in the engine compartment.
Could allow the engine to continue to run after the ignition switch is turned off.
What should be the first action after starting an aircraft engine?
Place the magneto or ignition switch momentarily in the OFF position to check for proper grounding.
Adjust for proper RPM and check for desired indications on the engine gauges.
Test each brake and the parking brake.
Combusted fuel is expelled from the cylinder of a two-cycle engine through an:
exhaust valve.
exhaust port.
intake port.
Air-cooled engines dissipate heat:
by collecting hot exhaust in a shroud that's passed into the cabin.
from air passing through a coolant heat exchanger.
through cooling fins on the cylinder.
One purpose of the dual ignition system on an aircraft engine is to provide for
balanced cylinder head pressure.
improved engine performance.
uniform heat distribution.
Two-cycle engine power and fuel economy can be greatly hindered when:
carburetor heat is not used at full throttle.
one-way pressure valves, or poppet valves, open when the pressure drops within the crankcase.
exhaust systems are installed that are not specifically tuned for an aviation engine.
The order of operation regarding the strokes of a typical four-stroke per cycle airplane engine is:
Compression, intake, power, and exhaust.
Intake, compression, power, and exhaust.
Power, compression, intake, and exhaust.
What action can a pilot take to aid in cooling an engine that is overheating during a climb?
Increase climb speed and increase RPM.
Reduce rate of climb and increase airspeed.
Reduce climb speed and increase RPM.
Most of the heat caused by internal combustion is eliminated via:
The exhaust system.
Air directed around the engine by the use of engine baffles.
Oil circulating through the oil cooler.
Why do most standard certificated aircraft incorporate a dual ignition system with two individual magnetos, separate sets of wires, and spark plugs?
To increase reliability of the ignition system.
The engine will not run properly with only one magneto.
To ensure engine balance.
After starting an airplane engine, what should a pilot verify on the oil pressure gauge?
The oil pressure should remain the same.
The oil pressure should drop.
The oil pressure should rise.
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