Aircraft Systems Flashcards
Should it become necessary to handprop an airplane engine, it is extremely important that a competent pilot:
Be at the controls in the cockpit.
What should be the first action after starting an aircraft engine?
Adjust for proper RPM and check for desired indications on the engine gauges.
What is one purpose for using reciprocating engines?
They are relatively simple and inexpensive to operate.
One purpose of the dual ignition system on an aircraft engine is to provide for:
Improved engine performance.
An electrical system failure (battery and alternator) occurs during flight. In this situation, you would:
Experience avionics equipment failure.
If the ground wire between the magneto and the ignition switch becomes disconnected, the most noticeable result will be that the engine:
Cannot be shutdown by turning the switch to the off position.
The operating principle of float-type carburetors is based on the:
Difference in air pressure at the venturi throat and the air inlet.
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.
While cruising at 9,500 MSL, the fuel/air mixture is properly adjusted. What will occur if a descent to 4,500 MSL is made without readjusting the mixture?
The fuel/air mixture will become excessively lean.
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 mixture.
If an aircraft is equipped with a fixed-pitch propeller and a float type carburetor, the first indication of carburetor ice would be:
Loss of RPM.
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.
Which condition is most favorable for the development of carburetor icing:
Temperature between 20 and 70 degrees F and high humidity.
The possibility of carburetor icing exists even when ambient air temperature is as:
High as 70 degrees F and the relative humidity is high.
Carburetor icing can occur with an OAT as high as:
20 degrees C and high relative humidity.
Applying carburetor heat will:
Enrich the fuel/air mixture.
What change occurs in the fuel/air mixture when carburetor heat is applied?
The fuel/air mixture becomes richer.
Generally speaking, the use of carburetor heat tends to:
Decrease engine performance.
With regard to carburetor ice, float type carburetor systems in comparison to fuel injection systems are generally considered to be:
More susceptible to icing.
On aircraft equipped with fuel pumps, when is the auxiliary electric driven pump used:
In the event engine driven fuel pump fails.
If the grade of fuel used in an aircraft engine is lower than specified for the engine, it will most likely cause:
Detonation.
Detonation may occur at high power settings when:
The fuel mixture ignites instantaneously instead of burning progressively and evenly.
Detonation occurs in a reciprocating aircraft engine when:
The unburned charge in the cylinders explodes instead of burning normally.
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.
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.
If a pilot suspects that the engine (with a fixed pitch propeller) is detonating during climb out after takeoff, the initial corrective action would be to:
Lower the nose slightly to increase airspeed.
Excessively high engine temperatures will:
Cause loss of power, excessive oil consumption, and possible permanent internal engine damage.
If the engine oil temperature and cylinder head temperature gaugues have exceeded their normal operating range, the pilot may have been operating with:
Too much power and with the mixture set too lean.
Which would most likely cause the cylinder head temperature and the engine oil temperature gauges to exceed their normal operating ranges:
Using fuel that has a lower than specified fuel rating.
For internal cooling, reciprocating aircraft engines are especially dependent on:
The circulation of lubricating oil.
An abnormally high engine oil temperature indication may be caused by:
The oil level being too low.
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.
What is one procedure to aid in cooling an engine that is overheating?
Enrichen the fuel mixture.
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.
How is engine operation controlled on an engine equipped with a constant speed propeler:
The throttle controls power output as registered on the manifold pressure gauge and the propeller control regulates engine RPM.
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.
In what flight condition is torque effect the greatest in a single engine airplane:
Low airspeed, high power, high angle of attack.
The left turning tendency of an airplane caused by P-factor is the result of:
Gyroscopic forces applied to the rotating propeller blades acting 90 degress in advance of the point force was applied.
When does P-factor cause the airplane to yaw to the left:
When at high angles of attack.
During the preflight inspection, who is responsible for determining the aircraft is safe for flight:
The pilot in command.
How should an aircraft preflight inspection be accomplished for the first flight of the day:
Thorough and systematic means recommended by the manufacturer.
Who is primarily responsible for maintaining an aircraft in airworthy condition:
Owner or operator.
