Commercial pilot

Question	Answer
which statements best describes the operating principle of a constant speed propeller?	C) the propeller control regukates the engien RPM and in turn the propeller RPM
which is tru regarding preheating an aircraft during cold weather operations?	A) the cabin area as well as the engine should be preheated
fuel/air ratio is the ratio between the	B) weight of fuel and weight of air entering the cylinder.
a way to detect a broken magneto primary grounding lead is to	A) idle the engine and momentarily turn the ignition off.
at hight altitudes, an excessively rich mixture will cause the	fouling of spark plugs.
what will occur if no leaning is made with the mixture control as the flight altitude increases?	C) The density of air enternig the carburetor decreases and the amount of fuel remains constant.
propeller efficiency is the	A) ratio of thrust horsepower to brake horsepower
The uncontrolled firing of the fuel/air charge in advance of normal spark ignition is know as	C ) pre-ignition.
The best power mixture is that fuel/air ratio at which	B) the most power can be obtained for any given throttle setting.
The mixture control can be adjusted, which	A) prevents the fuel/air combination from becoming too rich at higher altitudes.
a fixed-pitch propeller is desingned for best efficiency only at a given combination of	B) airspeed and RPM
consider a reciprocating aircraft engine. Detination can be causes by	C) using a lower grade of fuel than recommended
A detuning of engine crankshaft counterweights is a source of overstress that may be caused by	A) rapid opening and closing of the throttle.
fouling of spark plugs is more apt to occur if the aircraft	A) gains altitude with no mixture adjustment.
Applying carburetor heat will	C) enrich the fuel/air mixture.
to develop maximum power and thrust, a constant-speed propeller should be set to a blade angle that will produce a	B) small angle od attack and high RPM.
During preflight in cold weather, crankcase breather lines should receive special attention because they are susceptible to being clogged by	C) ice from ctankcase vapors that have condensed and subsesquently frozen.
the reason for variations in gepmetric pitch (twisting) along a propeller blade is that it	C) permits a relatively constant angle of attack along its length when in cruising flight.
the basic purpose of adjusting the fuel/air mixture control at altitude is to	A) decrease the fuel flow to compensate for decreased air density.
For takeoff, the blade angle of a controllable-pitch propeller should be set at a	A) small angle of attack and higj RPM
The most probable reason an engine continues to run after the ignition switch has been turned off is	C) a broken magneto ground wire.
an abnormally high engine oil temperature indication may be causes by	B) the oil level being too low.
If the ground wire between the magneto and the ignition switch becomes disconnected, the engine	C) could accidentally start if the propeller is moved with fuel in the cylinde.
leaving the carburetor heat on while taking off	C) will increase the ground roll
unless adjusted, the fuel/air mixture becomes richer with an increase in altitide because the amount of fuel	C) remains constant while the density of air decreases.
Detonation may occur at high-power sertings when	A) the fuel mixture ignities instantaneously instead of burning progressively and evenly
Detonation occurs in a reciprocating aircraft engine when	C) the unburned fuel/air charge in the cylinders is subjected to instantaneous combination
in aircraft equipment with constant-speed propellers and normally-aspirated engines, which procedure should be used to avoid placing undue stress on the engine components? when power is being	B) increased, increase the RPM before increasing the manifold pressure.
what should be expected when making a downwind leanding? the likelihood of	B) overshooting the intended leanding spot and faster groundspeed at touchdown.
for internal cooling, reciprocating aircraft engines are especially dependent on	B) the circulation of lubricating oil
your aircraft has an exhaust manifold type heating system. the exhaust manifold should be periodically inspected to avoid	A) carbon monoxide poisoning
which statement is true concerning the effect of the application of carburetor heat?	A) It enriches the fuel/air mixture.
the pilot controls the air/fuel ratio with the	C) mixture control

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	Created by Juan David Rubio Campillo over 6 years ago