Term
| As a result of gyroscopic precession, it can be said that any |
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Definition
| yawing around the vertical axis results in a pitching moment. |
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Term
| What is the main reason fuel tank vents must be open? To allow |
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Definition
| proper air pressure within the tanks for maintaining a steady fuel flow. |
|
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Term
| On a multiengine airplane with engines which rotate clockwise, the critical engine is the |
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Definition
| left engine, because the right engine center of thrust is farther away from the centerline of the fuselage. |
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Term
| What does the lower limit of the green arc on an airspeed indicator represent? |
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Definition
| Power-off stall speed in a specified configuration. |
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Term
| The distance a propeller actually advances in one revolution is |
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Definition
|
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Term
| A high-frequency vibration that suddenly occurs during flight could be an indication of a defective |
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Definition
|
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Term
| Concerning carburetor icing, which statement is true? |
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Definition
| Carburetor icing would most likely form when the air temperature is between -7°C and 21°C and visible moisture or high humidity is present. |
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Term
| Which statement is true concerning rotor systems? |
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Definition
| The main rotor blades of a semirigid rotor system can flap and feather as a unit. |
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Term
| Which statement is true regarding fouling of the spark plugs of an aircraft engine? |
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Definition
| Spark plug fouling results from operating with an excessively rich mixture. |
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Term
| A high-frequency vibration in flight would most likely indicate potential trouble with |
|
Definition
| piston engine malfunction |
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Term
| Proper mixture control and better economy in the operation of a fuel injected engine can be achieved best by use of |
|
Definition
| an exhaust gas temperature indicator. |
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Term
| In the Northern Hemisphere, a magnetic compass will normally indicate a turn toward the north if |
|
Definition
| an aircraft is accelerated while on an east or west heading. |
|
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Term
| At high altitudes, an excessively rich mixture will cause the |
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Definition
|
|
Term
| Which statement is true about magnetic deviation of a compass? |
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Definition
| Deviation varies for different headings of the same aircraft. |
|
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Term
| Under what condition is indicated altitude the same as true altitude? |
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Definition
| When at sea level under standard conditions. |
|
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Term
| What is the primary purpose of the freewheeling unit? |
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Definition
| It provides disengagement of the engine from the rotor system for autorotation purposes. |
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Term
| An electrical system failure (battery and alternator) occurs during flight. In this situation, you would |
|
Definition
| experience avionics equipment failure. |
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Term
| The fuel vent on many powered parachutes and weight shift control aircraft are located |
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Definition
|
|
Term
| An abnormally high engine oil temperature indication may be caused by |
|
Definition
| the oil level being too low. |
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Term
| The valve located on each tank that indicates the tank is filled to 80 percent capacity is the |
|
Definition
|
|
Term
| What does the lower limit of the white arc on an airspeed indicator represent? |
|
Definition
| Power-off stall speed in a landing configuration. |
|
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Term
| 2-cycle engine thrust and fuel efficiency can be greatly compromised when |
|
Definition
| intake valve lifters fail to pressurize and provide adequate fuel to the combustion chamber. |
|
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Term
| In addition to an added safety factor, dual ignition systems also provide |
|
Definition
|
|
Term
| If the grade of fuel used in an aircraft engine is lower than that specified, it may cause |
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Definition
|
|
Term
| The purpose of a kill switch is to |
|
Definition
| ground the lead wire to the ignition coil shutting down the powerplant. |
|
|
Term
| The main rotor blades of a fully-articulated rotor system can |
|
Definition
| flap, drag, and feather independently |
|
|
Term
| Fuel injection systems, compared to carburetor systems, are generally considered to be |
|
Definition
| just as susceptible to impact icing |
|
|
Term
| Why should methanol be added to propane fuel |
|
Definition
| Helps prevent moisture from forming in the fuel system. |
|
|
Term
| The best power mixture is that fuel/air ratio at which |
|
Definition
| the most power can be obtained for any given throttle setting. |
|
|
Term
| Running a fuel tank dry before switching tanks is not a good practice because |
|
Definition
| the engine-driven fuel pump or electric fuel boost pump draw air into the fuel system and cause vapor lock. |
|
|
Term
| The rotor blade pitch angle is the acute angle between the blade chord line and the |
|
Definition
|
|
Term
| A standby source of fuel to an engine in a powered parachute is typically |
|
Definition
| from an electrically powered pump. |
|
|
Term
| If the ground wire between the magneto and the ignition switch becomes disconnected, the most noticeable result will be that the engine |
|
Definition
| cannot be shut down by turning the switch to the OFF position. |
|
|
Term
| The basic purpose of adjusting the fuel/air mixture control at altitude is to |
|
Definition
| decrease the fuel flow to compensate for decreased air density. |
|
|
Term
| Detonation in an aircraft engine is most likely to occur whenever the |
|
Definition
| engine is operated under conditions which cause the fuel mixture to burn instantaneously. |
|
|
Term
| Detonation can be caused by |
|
Definition
| using a lower grade of fuel than recommended. |
|
|
Term
| Which condition is most favorable to the development of carburetor icing? |
|
Definition
| Temperature between 20 and 70°F and high humidity. |
|
|
Term
| The presence of carburetor ice in an aircraft equipped with a fixed-pitch propeller can be verified by applying carburetor heat and noting |
|
Definition
| a decrease in RPM and then a gradual increase in RPM. |
|
|
Term
| The operating principle of float-type carburetors is based on the |
|
Definition
| increase in air velocity in the throat of a venturi causing a decrease in air pressure. |
|
|
Term
| Propeller slip is the difference between the |
|
Definition
| geometric pitch and the effective pitch of the propeller. |
|
|
Term
| The first indication of carburetor icing in an aircraft equipped with a constant-speed propeller would most likely be a |
|
Definition
| decrease in manifold pressure. |
|
|
Term
| Combusted fuel is expelled from a 2-cycle engine through an |
|
Definition
|
|
Term
| How does temperature and weight affect the V(NE) of a helicopter? |
|
Definition
| V(NE) decreases as temperature and weight increase. |
|
|
Term
| In the Northern Hemisphere, if an aircraft is accelerated or decelerated, the magnetic compass will normally indicate |
|
Definition
| correctly when on a north or south heading while either accelerating or decelerating. |
|
|
Term
| The low temperature that causes carburetor ice in an engine equipped with a float-type carburetor is normally the result of the |
|
Definition
| vaporization of fuel and expansion of air in the carburetor. |
|
|
Term
| Pilots should refrain from revving an engine with a reduction drive because |
|
Definition
| the torque exerted on the gears during excessive acceleration and deceleration can cause the gear box to self-destruct. |
|
|
Term
| In most helicopters, what is one cause of in-flight medium frequency vibrations? |
|
Definition
| Improper rigging of tail rotor. |
|
|
Term
| During preflight, the fuel vent system should always be checked |
|
Definition
| to ensure the vent is open. |
|
|
Term
| The first indication of carburetor ice in an aircraft with a four-cycle engine and fixed-pitch propeller is |
|
Definition
|
|
Term
| The first indication of carburetor ice in an aircraft with a fixed-pitch propeller is |
|
Definition
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