Which stroke of the reciprocating engine provides power output?
Compression stroke.
Power stroke.
Exhaust stroke.
How is engine operation controller on an engine equipped with a constant-speed propeller?
The throttle controls power output as registered on the manifold pressure gauge and the propeller control regulates engine RPM.
The throttle controls power output as registered on the manifold pressure gauge and the propeller control regulates a constant blade angle.
The throttle controls engine RPM as registered on the tachometer and the mixture control regulates the power output.
What type fuel can be substituted for an aircraft if the recommended octane is not available?
The next higher octane aviation gas.
The next lower octane aviation gas.
Unleaded automotive gas of the same octane rating.
If the grade of fuel used in an aircraft engine is lower than specified for the engine, it will most likely cause:
a mixture of fuel and air that is not uniform in all cylinders.
detonation.
lower cylinder head temperatures.
Applying carburetor heat will:
enrich the fuel/air mixture.
result in more air going through the carburetor.
not affect the fuel/air mixture.
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Generally speaking, the use of carburetor heat tends to:
have no effect on engine performance.
increase engine performance.
decrease engine performance.
Which condition is most favorable to the development of carburetor icing?
Temperature between -7℃ and 21℃ and high humidity.
Temperature between 0℃ and 11℃ andlowhumidity.
Any temperature below freezing and a relative humidity of less than 50 percent.
The presence of carburetor ice in an aircraft equipped with a fixed-pitch propeller can be verified by applying carburetor heat and noting:
a decrease in RPM and then a gradual increase in RPM.
an increase in RPM and then a gradual decrease in RPM.
a decrease in RPM and then a constant RPM indication.
If an aircraft is equipped with a fixed-pitch propeller and a float-type carburetor, the first indication of carburetor ice would most likely be :
loss of RPM
engine roughness
a drop in oil temperature and cylinder head temperature
The operating principle of float-type carburetors is based on the :
difference in air pressure at the venturi throat and the air inlet.
automatic metering of air at the venturi as the aircraft gains altitude.
increase in air velocity in the throat of a venturi causing an increase in air pressure.
