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 -Check for desired indications on the engine gauges

Question 3

What is one purpose for using reciprocating engines?

Answer 3

-Relatively simple -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

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

Answer 5

magneto

Question 6

Most small airplanes are powered by ______ engines

Answer 6

reciprocating

Question 7

The two main advantages of the dual ignition system are

Answer 7

-increased safety -improved engine performance

Question 8

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

Answer 8

Experience avionics equipment failure

Question 9

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

Answer 9

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

Question 10

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

Answer 10

system redundancy in the ignition system

Question 11

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

Answer 11

Experience avionics equipment failure

Question 12

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

Answer 12

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

Question 13

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

Answer 13

air/fuel mixture to the cylinders

Question 14

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

Answer 14

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

Question 15

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

Answer 15

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

Question 16

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?

Answer 16

The fuel/air mixture may become excessively lean

Question 17

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

Answer 17

fuel injection system

Question 18

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

Answer 18

Carburetor heat

Question 19

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 19

Check the results obtained with a leaner setting of the mixture

Question 20

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

Answer 20

Loss of RPM

Question 21

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

Answer 21

a decrease in RPM and then a gradual increase in RPM

Question 22

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

Answer 22

Temperature between 20 and 70°F and high humidity.

Question 23

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

Answer 23

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

Question 24

Carburetor icing can occur with an OAT as high as

Answer 24

20°C and high relative humidity

Question 25

Applying carburetor heat will

Answer 25

Enrich the fuel/air mixture

Question 26

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

Answer 26

The fuel/air mixture becomes richer

Question 27

Generally speaking, the use of carburetor heat tends to

Answer 27

decrease engine performance

Question 28

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

Answer 28

more susceptible to icing

Question 29

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

Answer 29

Temperature between 20 and 70°F and high humidity.

Question 30

Fuel does two things for the engine

Answer 30

-agent for combustion -agent for cooling

Question 31

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

Answer 31

Detonation

Question 32

the premature burning of the air/fuel mixture

Answer 32

Preignition

Question 33

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

Answer 33

In the event engine-driven fuel pump fails

Question 34

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

Answer 34

detonation

Question 35

Detonation may occur at high-power settings when

Answer 35

the fuel mixture ignites instantaneously instead of burning progressively and evenly

Question 36

Detonation occurs in a reciprocating aircraft engine when

Answer 36

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

Question 37

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

Answer 37

pre-ignition

Question 38

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

Answer 38

The next higher octane aviation gas.

Question 39

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

Answer 39

prevent moisture condensation by eliminating airspace in the tanks.

Question 40

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 40

fuel strainer drain and the fuel tank sumps.

Question 41

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

Answer 41

ice from crankcase vapors that have condensed and subsequently frozen.

Question 42

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

Answer 42

Engine lubricating oil

Question 43

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

Answer 43

lower the nose slightly to increase airspeed

Question 44

Excessively high engine temperatures will

Answer 44

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

Question 45

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

Answer 45

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

Question 46

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

Answer 46

too much power and with the mixture set too lean.

Question 47

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

Answer 47

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

Question 48

For internal cooling, reciprocating aircraft engines are especially dependent on

Answer 48

the circulation of lubricating oil

Question 49

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

Answer 49

The cabin area as well as the engine should be preheated

Question 50

An abnormally high engine oil temperature indication may be caused by

Answer 50

the oil level being too low

Question 51

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

Answer 51

Reduce rate of climb and increase airspeed.

Question 52

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

Answer 52

Enrichen the fuel mixture

Question 53

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

Answer 53

immediately establish the proper gliding attitude and airspeed

Question 54

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

Answer 54

Constant-speed propeller

Question 55

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

Answer 55

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

Question 56

What is an advantage of a constant-speed propeller?

Answer 56

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

Question 57

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

Answer 57

avoid high manifold pressure settings with low RPM

Question 58

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

Answer 58

Reactive force

Question 59

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

Answer 59

torque

Question 60

the reaction of the air to a rotating propeller

Answer 60

Spiraling slipstream

Question 61

the result of a deflective force applied to a rotating body

Answer 61

Gyroscopic precession

Question 62

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

Answer 62

P-factor

Question 63

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

Answer 63

Low airspeed, high power, high angle of attack

Question 64

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

Answer 64

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

Question 65

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

Answer 65

When at high angles of attack

Question 66

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

Answer 66

Preflight inspection

Question 67

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

Answer 67

The pilot in command

Question 68

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

Answer 68

Thorough and systematic means recommended by the manufacturer.

Question 69

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

Answer 69

Owner or operator