Aircraft systems quiz Flashcards
result in more air going through the carburetor.
enrich the fuel/air mixture.
With regard to carburetor ice, float-type carburetor systems in comparison to fuel injection systems are generally considered to be
more susceptible to icing.
Carburetor icing can occur with an OAT as high as
20° C and high relative humidity.
To properly purge water from the fuel system of an aircraft equipped with fuel tank sumps and a fuel strainer quick drain, it is necessary to drain fuel from the
fuel strainer drain and the fuel tank sumps.
The most important rule to remember in the event of a power failure after becoming airborne is to
immediately establish the proper gliding attitude and airspeed.
One purpose of the dual ignition system on an aircraft engine is to provide for
improved engine performance.
What is one purpose for using reciprocating engines?
They are relatively simple and inexpensive to operate.
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.
What change occurs in the fuel/air mixture when carburetor heat is applied?
The fuel/air mixture becomes richer.
Detonation may occur at high-power settings when
the fuel mixture ignites instantaneously instead of burning progressively and evenly.
On aircraft equipped with fuel pumps, when is the auxiliary electric driven pump used?
In the event engine-driven fuel pump fails.
An electrical system failure (battery and alternator) occurs during flight. In this situation, you would
experience avionics equipment failure.
How is engine operation controlled 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.
An abnormally high engine oil temperature indication may be caused by
the oil level being too low.
During the run-up at a high-elevation airport, a pilot notes a slight engine roughness that is not affected by the magneto check but grows worse during the carburetor heat check. Under these circumstances, what would be the most logical initial action?
Check the results obtained with a leaner setting of the mixture.
If the engine oil temperature and cylinder head temperature gauges have exceeded their normal operating range, the pilot may have been operating with
too much power and with the mixture set too lean.
If a pilot suspects that the engine (with a fixed-pitch propeller) is detonating during climb-out after takeoff, the initial corrective action to take would be to
lower the nose slightly to increase airspeed.
The possibility of carburetor icing exists even when the ambient air temperature is as
high as 70°F and the relative humidity is high.
For internal cooling, reciprocating aircraft engines are especially dependent on
the circulation of lubricating oil.
Generally speaking, the use of carburetor heat tends to
decrease engine performance.
During the preflight inspection who is responsible for determining the aircraft is safe for flight?
The pilot-in-command.
The basic purpose of adjusting the fuel/air mixture at altitude is to
decrease the fuel flow in order to compensate for decreased air density.
The left turning tendency of an airplane caused by P-factor is the result of the
propeller blade descending on the right, producing more thrust than the ascending blade on the left.
What is one procedure to aid in cooling an engine that is overheating?
Enrichen the fuel mixture.
Which condition is most favorable to the development of carburetor icing?
Temperature between 20 and 70°F and high humidity.
While cruising at 9,500 feet MSL, the fuel/air mixture is properly adjusted. What will occur if a descent to 4,500 feet MSL is made without readjusting the mixture?
The fuel/air mixture may become excessively lean.
Excessively high engine temperatures will
cause loss of power, excessive oil consumption, and possible permanent internal engine damage.
Which would most likely cause the cylinder head temperature and engine oil temperature gauges to exceed their normal operating ranges?
Using fuel that has a lower-than-specified fuel rating.
The operating principle of float-type carburetors is based on the
difference in air pressure at the venturi throat and the air inlet.
What should be the first action after starting an aircraft engine?
Adjust for proper RPM and check for desired indications on the engine gauges.
Who is primarily responsible for maintaining an aircraft in airworthy condition?
Owner or operator.
Should it become necessary to handprop an airplane engine, it is extremely important that a competent pilot
be at the controls in the cockpit.
If the ground wire between the magneto and the ignition switch becomes disconnected, the most noticeable result will be that the engine
cannot be shut down by turning the switch to the OFF position.
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.
The uncontrolled firing of the fuel/air charge in advance of normal spark ignition is known as
pre-ignition.
What type fuel can be substituted for an aircraft if the recommended octane is not available?
The next higher octane aviation gas.
Filling the fuel tanks after the last flight of the day is considered a good operating procedure because this will
prevent moisture condensation by eliminating airspace in the tanks.
Excessively high engine temperatures, either in the air or on the ground, will
cause loss of power, excessive oil consumption, and possible permanent internal engine damage.
Detonation occurs in a reciprocating aircraft engine when
the unburned charge in the cylinders explodes instead of burning normally.
When does P-factor cause the airplane to yaw to the left?
When at high angles of attack.
In what flight condition are torque effects more pronounced in a single-engine airplane?
Low airspeed, high power, high angle of attack.
How should an aircraft preflight inspection be accomplished for the first flight of the day?
Thorough and systematic means recommended by the manufacturer.
What is an advantage of a constant-speed propeller?
Permits the pilot to select the blade angle for the most efficient performance.
A precaution for the operation of an engine equipped with a constant-speed propeller is to
avoid high manifold pressure settings with low RPM.
What action can a pilot take to aid in cooling an engine that is overheating during a climb?
Reduce rate of climb and increase airspeed.
If the grade of fuel used in an aircraft engine is lower than specified for the engine, it will most likely cause
detonation.
