FAA PPL Test Prep: Ch. 2: Aircraft Systems Questions

The possibility of carburetor icing exists even when ambient air temperature is as

high as 70 degrees Fahrenheit and the relative humidity is high.

Carburetor icing can occur with an OAT as high as

20 degrees Celsius and high relative humidity.

Detonation may occur at high-power settings when

the fuel mixture ignites instantaneously instead of burning progressively and evenly.

If a pilot suspects that the engine (with a fixed-pitch propeller) is detonating during a climb out after takeoff, the initial corrective action to take would be to

lower the nose slightly to increase airspeed.

For internal cooling reciprocating aircraft engines are especially dependent on

the circulation of lubricating oil.

Should it become necessary to hand prop 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 it 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 shut down 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 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.

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 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 presence of carburetor ice in an aircraft quipped 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 conditioning is most favorable to the development of carburetor icing?

Temperature between 20 and 70 degrees Fahrenheit and high 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 likley cause

detonation.

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.

Excessively high engine temperatures will

cause loss of power, excessive oil consumption, and possible permanent internal engine damage.

Excessively high engine temperatures either in the air or on the ground will

cause loss of power, excessive oil consumption, and possible internal engine damage.

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.

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.

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?

Reducing 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 propeller?

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 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 the

propeller blade descending on the right producing more thrust than the ascending blade on the left.

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.