Lesson 2 — Aircraft Systems Flashcards
What action can a pilot take to aid in cooling an engine that is overheating during a climb?
A—Lean the mixture to best power condition.
B—Increase rpm and reduce climb speed.
C—Reduce rate of climb and increase airspeed.
C
A precaution for the operation of an engine equipped with a constant-speed propeller is to
A—avoid high RPM settings with high manifold pressure.
B—avoid high manifold pressure settings with low RPM.
C—always use a rich mixture with high RPM settings.
B
Filling the fuel tanks after the last flight of the day is considered a good operating procedure because this will
A—force any existing water to the top of the tank away from the fuel lines to the engine.
B—prevent expansion of the fuel by eliminating airspace in the tanks.
C—prevent moisture condensation by eliminating airspace in the tanks.
C
Which condition is most favorable to the development of carburetor icing?
A—Any temperature below freezing and a relative humidity of less than 50 percent.
B—Temperature between 32 and 50ºF and low humidity.
C—Temperature between 20 and 70ºF and high humidity.
C
The uncontrolled firing of the fuel/air charge in advance of normal spark ignition is known as
A—combustion
B—preignition
C—detonation
B
If the engine oil temperature and cylinder head temperature gauges have exceeded their normal operating range, the pilot may have been
A—operating with the mixture set too rich
B—using fuel that has a higher-than-specified fuel rating.
C—operating with too much power and with the mixture set too lean.
C
If an engine continues to run after the ignition switch is turned to the OFF position, the probable cause may be
A—the mixture is too lean and this causes the engine to diesel.
B—a broken magneto ground wire.
C—fouled spark plugs.
B
Detonation occurs in a reciprocating aircraft engine when
A—hot spots in the combustion chamber ignite the fuel/air mixture in advance of normal ignition.
B—there is too rich a fuel/air mixture.
C—the unburned charge in the cylinders explodes instead of burning evenly.
C
An abnormally high engine oil temperature indication may be caused by
A—the oil level being too low.
B—operating with a too high viscosity oil.
C—operating with an excessively rich mixture.
A
What type of fuel can be substituted for an aircraft if the recommended octane is not available?
A—The next higher octane aviation gas.
B—The next lower octane aviation gas.
C—Unleaded automotive gas of the same octane rating.
A
In an aircraft equipped with a constant-speed propeller and a normally aspirated engine, which procedure would be used to avoid placing undue stress on the engine components?
A—When power is being increased or decreased, the rpm should be adjusted before the manifold pressure.
B—When power is being decreased, reduce the rpm before reducing the manifold pressure.
C—When power is being increased, increase the rpm before increasing the manifold pressure.
C
The main purpose of the mixture control is to
A—adjust the fuel flow to obtain the proper air/fuel ratio.
B—increase the oxygen supplied to the engine.
C—decrease the oxygen supplied to the engine.
A
Which statement is true regarding the effect of the application of carburetor heat?
A—It reduces the density of air entering the car-buretor, thus enriching the fuel/air mixture.
B—It reduces the density of air entering the car-buretor, thus leaning the fuel/air mixture.
C—It reduces the volume of air entering the carburetor, thus enriching the fuel/air mixture.
A
What will occur if no leaning is made with the mixture control as the flight altitude increases?
A—The volume of air entering the carburetor remains constant and the amount of fuel decreases.
B—The volume of air entering the carburetor decreases and the amount of fuel decreases.
C—The density of the air entering the carburetor decreases and the amount of fuel remains constant.
C
