Powerplant Quiz CPL
A way to detect a broken magneto primary grounding lead is to
idle the engine and momentarily turn the ignition off.
add full power, while holding the brakes, and momentarily turn off the ignition.
run on one magneto, lean the mixture, and look for a rise in manifold pressure.
Fouling of spark plugs is more apt to occur if the aircraft
gains altitude with no mixture adjustment.
descends from altitude with no mixture adjustment.
throttle is advanced very abruptly.
If the ground wire between the magneto and the ignition switch becomes disconnected, the engine
will not operate on one magneto.
cannot be started with the switch in the BOTH position.
could accidentally start if the propeller is moved with fuel in the cylinder.
For internal cooling, reciprocating aircraft engines are especially dependent on
a properly functioning cowl flap augmenter.
the circulation of lubricating oil.
the proper freon/compressor output ratio.
Detonation may occur at high-power settings when
the fuel mixture ignites instantaneously instead of burning progressively and evenly.
an excessively rich fuel mixture causes an explosive gain in power.
the fuel mixture is ignited too early by hot carbon deposits in the cylinder.
The uncontrolled firing of the fuel/air charge in advance of normal spark ignition is known as
instantaneous combustion.
detonation.
pre-ignition.
Detonation occurs in a reciprocating aircraft engine when
there is an explosive increase of fuel caused by too rich a fuel/air mixture.
the spark plugs receive an electrical jolt caused by a short in the wiring.
the unburned charge in the cylinders is subjected to instantaneous combustion.
A detuning of engine crankshaft counterweights is a source of over-stress that may be caused by
rapid opening and closing of the throttle.
carburetor ice forming on the throttle valve.
operating with an excessively rich fuel/air mixture.
Detonation can be caused by
a 'rich' mixture.
low engine temperatures.
using a lower grade of fuel than recommended.
An abnormally high engine oil temperature indication may be caused by
a defective bearing.
the oil level being too low.
operating with an excessively rich mixture.
What does FADEC do?
Allows for a higher service ceiling.
Greatly reduces the chances of engine failure.
Controls an aircraft’s engine and propeller.
What is the benefit of FADEC in a reciprocating engine?
Greatly reduces oil consumption by the engine.
Greatly reduces the chances of engine failure.
Optimized fuel-air mixture.
What action should you take if you notice high engine temperature indications?
Use an enriched fuel mixture, as well as a shallow climb angle, to increase cylinder cooling during takeoff and initial climb.
Lean the mixture.
Climb to a higher altitude.
The oil temperature gauge is indicating a low reading while flying in cold weather. What could be the likely cause?
Improper oil viscosity has been used.
The oil cap is not tight enough to form a seal.
An insufficient quantity of oil has been used.
If you increase the engine manifold pressure beyond the manufacturer's specified limits, what may happen?
Nothing, the wastegate will dump the excess pressure to the atmosphere.
The cylinder components may be weakened, and engine failure can occur as a result.
The propeller may fail due to excess RPMs.
A way to detect a broken magneto primary grounding lead is to
run on one magneto, lean the mixture, and look for a rise in manifold pressure.
add full power, while holding the brakes, and momentarily turn off the ignition.
idle the engine and momentarily turn the ignition off.
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