Aircraft Systems

Question 1

Should it become necessary to handprop an airplane engine, it is extremely important that a competent pilot:

Answer 1

Be at the controls in the cockpit.

Question 2

What should be the first action after starting an aircraft engine?

Answer 2

Adjust for proper RPM and check for desired indications on the engine gauges.

Question 3

What is one purpose for using reciprocating engines?

Answer 3

They are relatively simple and inexpensive to operate.

Question 4

One purpose of the dual ignition system on an aircraft engine is to provide for:

Answer 4

Improved engine performance.

Question 5

An electrical system failure (battery and alternator) occurs during flight. In this situation, you would:

Answer 5

Experience avionics equipment failure.

Question 6

If the ground wire between the magneto and the ignition switch becomes disconnected, the most noticeable result will be that the engine:

Answer 6

Cannot be shutdown by turning the switch to the off position.

Question 7

The operating principle of float-type carburetors is based on the:

Answer 7

Difference in air pressure at the venturi throat and the air inlet.

Question 8

The basic purpose of adjusting the fuel/air mixture at altitude is to:

Answer 8

Decrease the fuel flow in order to compensate for decreased air density.

Question 9

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?

Answer 9

The fuel/air mixture will become excessively lean.

Question 10

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?

Answer 10

Check the results obtained with a leaner mixture.

Question 11

If an aircraft is equipped with a fixed-pitch propeller and a float type carburetor, the first indication of carburetor ice would be:

Answer 11

Loss of RPM.

Question 12

The presence of carburetor ice in an aircraft equipped with a fixed-pitch propeller can be verified by applying carburetor heat and noting:

Answer 12

A decrease in RPM and then a gradual increase in RPM.

Question 13

Which condition is most favorable for the development of carburetor icing:

Answer 13

Temperature between 20 and 70 degrees F and high humidity.

Question 14

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

Answer 14

High as 70 degrees F and the relative humidity is high.

Question 15

Carburetor icing can occur with an OAT as high as:

Answer 15

20 degrees C and high relative humidity.

Question 16

Applying carburetor heat will:

Answer 16

Enrich the fuel/air mixture.

Question 17

What change occurs in the fuel/air mixture when carburetor heat is applied?

Answer 17

The fuel/air mixture becomes richer.

Question 18

Generally speaking, the use of carburetor heat tends to:

Answer 18

Decrease engine performance.

Question 19

With regard to carburetor ice, float type carburetor systems in comparison to fuel injection systems are generally considered to be:

Answer 19

More susceptible to icing.

Question 20

On aircraft equipped with fuel pumps, when is the auxiliary electric driven pump used:

Answer 20

In the event engine driven fuel pump fails.

Question 21

If the grade of fuel used in an aircraft engine is lower than specified for the engine, it will most likely cause:

Answer 21

Detonation.

Question 22

Detonation may occur at high power settings when:

Answer 22

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

Question 23

Detonation occurs in a reciprocating aircraft engine when:

Answer 23

The unburned charge in the cylinders explodes instead of burning normally.

Question 24

The uncontrolled firing of the fuel/air charge in advance of normal spark ignition is known as:

Answer 24

Pre-ignition.

Question 25

What type fuel can be substituted for an aircraft if the recommended octane is not available?

Answer 25

The next higher octane aviation gas.

Question 26

Filling the fuel tanks after the last flight of the day is considered a good operating procedure because this will:

Answer 26

Prevent moisture condensation by eliminating airspace in the tanks.

Question 27

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:

Answer 27

Fuel strainer drain and the fuel tank sumps.

Question 28

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:

Answer 28

Lower the nose slightly to increase airspeed.

Question 29

Excessively high engine temperatures will:

Answer 29

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

Question 30

If the engine oil temperature and cylinder head temperature gaugues have exceeded their normal operating range, the pilot may have been operating with:

Answer 30

Too much power and with the mixture set too lean.

Question 31

Which would most likely cause the cylinder head temperature and the engine oil temperature gauges to exceed their normal operating ranges:

Answer 31

Using fuel that has a lower than specified fuel rating.

Question 32

For internal cooling, reciprocating aircraft engines are especially dependent on:

Answer 32

The circulation of lubricating oil.

Question 33

An abnormally high engine oil temperature indication may be caused by:

Answer 33

The oil level being too low.

Question 34

What action can a pilot take to aid in cooling an engine that is overheating during a climb:

Answer 34

Reduce rate of climb and increase airspeed.

Question 35

What is one procedure to aid in cooling an engine that is overheating?

Answer 35

Enrichen the fuel mixture.

Question 36

The most important rule to remember in the event of a power failure after becoming airborne is to:

Answer 36

Immediately establish the proper gliding attitude and airspeed.

Question 37

How is engine operation controlled on an engine equipped with a constant speed propeler:

Answer 37

The throttle controls power output as registered on the manifold pressure gauge and the propeller control regulates engine RPM.

Question 38

What is an advantage of a constant speed propeller:

Answer 38

Permits the pilot to select the blade angle for the most efficient performance.

Question 39

A precaution for the operation of an engine equipped with a constant speed propeller is to:

Answer 39

Avoid high manifold pressure settings with low RPM.

Question 40

In what flight condition is torque effect the greatest in a single engine airplane:

Answer 40

Low airspeed, high power, high angle of attack.

Question 41

The left turning tendency of an airplane caused by P-factor is the result of:

Answer 41

Gyroscopic forces applied to the rotating propeller blades acting 90 degress in advance of the point force was applied.

Question 42

When does P-factor cause the airplane to yaw to the left:

Answer 42

When at high angles of attack.

Question 43

During the preflight inspection, who is responsible for determining the aircraft is safe for flight:

Answer 43

The pilot in command.

Question 44

How should an aircraft preflight inspection be accomplished for the first flight of the day:

Answer 44

Thorough and systematic means recommended by the manufacturer.

Question 45

Who is primarily responsible for maintaining an aircraft in airworthy condition:

Answer 45

Owner or operator.