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Principles of Flight 1 > Aircraft Systems > Flashcards

Aircraft Systems Flashcards

AVP 141

1
Q

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

A

Be at the controls in the cockpit.

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2
Q

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

A

-Adjust for proper RPM -Check for desired indications on the engine gauges

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3
Q

What is one purpose for using reciprocating engines?

A

-Relatively simple -Inexpensive to operate

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4
Q

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

A

improved engine performance

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5
Q

a self-contained source of electrical energy, so even if an aircraft loses total electrical power, the engine will continue to run

A

magneto

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6
Q

Most small airplanes are powered by ______ engines

A

reciprocating

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7
Q

The two main advantages of the dual ignition system are

A

-increased safety -improved engine performance

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8
Q

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

A

Experience avionics equipment failure

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9
Q

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

A

cannot be shut down by turning the switch to the OFF position

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10
Q

One purpose of the dual ignition system on a two-cycle engine is to provide for

A

system redundancy in the ignition system

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11
Q

an electrical system failure (battery and alternator) occurs in a magneto equipped aircraft during flight. In this situation, you would

A

Experience avionics equipment failure

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12
Q

Concerning the advantages of an aircraft generator or alternator, select the true statement

A

An alternator provides more electrical power at lower engine RPM than a generator

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13
Q

Most light airplane engines use either a carburetor or a fuel injection system to deliver

A

air/fuel mixture to the cylinders

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14
Q

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

A

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

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15
Q

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

A

decrease the fuel flow in order to compensate for decreased air density

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16
Q

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?

A

The fuel/air mixture may become excessively lean

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17
Q

The fuel and air are mixed just prior to entering the combustion chamber. No carburetor is used.

A

fuel injection system

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18
Q

Preheats the air before it enters the carburetor and either prevents carburetor ice from forming or melts any ice which may have formed

A

Carburetor heat

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19
Q

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?

A

Check the results obtained with a leaner setting of the mixture

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20
Q

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

A

Loss of RPM

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21
Q

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

A

a decrease in RPM and then a gradual increase in RPM

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22
Q

Which condition is most favorable to the development of carburetor icing?

A

Temperature between 20 and 70°F and high humidity.

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23
Q

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

A

high as 70°F and the relative humidity is high.

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24
Q

Carburetor icing can occur with an OAT as high as

A

20°C and high relative humidity

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25
Q

Applying carburetor heat will

A

Enrich the fuel/air mixture

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26
Q

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

A

The fuel/air mixture becomes richer

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27
Q

Generally speaking, the use of carburetor heat tends to

A

decrease engine performance

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28
Q

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

A

more susceptible to icing

29
Q

Which condition is most favorable to the development of carburetor icing?

A

Temperature between 20 and 70°F and high humidity.

30
Q

Fuel does two things for the engine

A

-agent for combustion -agent for cooling

31
Q

The use of low-grade fuel or an air/fuel mixture which is too lean may cause

A

Detonation

32
Q

the premature burning of the air/fuel mixture

A

Preignition

33
Q

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

A

In the event engine-driven fuel pump fails

34
Q

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

A

detonation

35
Q

Detonation may occur at high-power settings when

A

the fuel mixture ignites instantaneously instead of burning progressively and evenly

36
Q

Detonation occurs in a reciprocating aircraft engine when

A

The spark plugs are fouled or shorted out or the wiring is defective

37
Q

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

A

pre-ignition

38
Q

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

A

The next higher octane aviation gas.

39
Q

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

A

prevent moisture condensation by eliminating airspace in the tanks.

40
Q

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

A

fuel strainer drain and the fuel tank sumps.

41
Q

During preflight in cold weather, crankcase breather lines should receive special attention because they are susceptible to being clogged by

A

ice from crankcase vapors that have condensed and subsequently frozen.

42
Q

prevents direct metal-to-metal contact of moving parts, it also absorbs and dissipates some of the engine heat produced by internal combustion

A

Engine lubricating oil

43
Q

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

A

lower the nose slightly to increase airspeed

44
Q

Excessively high engine temperatures will

A

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

45
Q

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

A

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

46
Q

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

A

too much power and with the mixture set too lean.

47
Q

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

A

Using fuel that has a lower-than-specified fuel rating.

48
Q

For internal cooling, reciprocating aircraft engines are especially dependent on

A

the circulation of lubricating oil

49
Q

Which is true regarding preheating an aircraft during cold weather operations?

A

The cabin area as well as the engine should be preheated

50
Q

An abnormally high engine oil temperature indication may be caused by

A

the oil level being too low

51
Q

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

A

Reduce rate of climb and increase airspeed.

52
Q

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

A

Enrichen the fuel mixture

53
Q

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

A

immediately establish the proper gliding attitude and airspeed

54
Q

This type of propeller allows the pilot to select the most efficient propeller blade angle for each phase of flight

A

Constant-speed propeller

55
Q

How is engine operation controlled on an engine equipped with a constant-speed propeller?

A

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

56
Q

What is an advantage of a constant-speed propeller?

A

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

57
Q

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

A

avoid high manifold pressure settings with low RPM

58
Q

A propeller rotating in a clockwise direction (as seen from the rear) produces a force which tends to roll the airplane in a counterclockwise direction

A

Reactive force

59
Q

a combination of four forces: namely, reactive force, spiraling slipstream, gyroscopic precession, and P-factor

A

torque

60
Q

the reaction of the air to a rotating propeller

A

Spiraling slipstream

61
Q

the result of a deflective force applied to a rotating body

A

Gyroscopic precession

62
Q

caused by the downward moving blade on the right side of the propeller having a higher angle of attack, a greater action and reaction, and therefore a higher thrust than the upward moving opposite blade

A

P-factor

63
Q

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

A

Low airspeed, high power, high angle of attack

64
Q

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

A

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

65
Q

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

A

When at high angles of attack

66
Q

should be performed on an aircraft to help ensure that the aircraft is prepared for safe flight and should be a thorough and systematic means by which the pilot determines the airplane is ready for safe flight

A

Preflight inspection

67
Q

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

A

The pilot in command

68
Q

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

A

Thorough and systematic means recommended by the manufacturer.

69
Q

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

A

Owner or operator

Principles of Flight 1 (5 decks)

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