Chapter 2

25 July 2022
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question
Which is true regarding preheating an aircraft during cold weather operations?
answer
The cabin area as well as the engine should be preheated.
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What is one procedure to aid in cooling an engine that is overheating?
answer
Enrichen the fuel mixture
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What is an advantage of a constant-speed propeller?
answer
Permits the pilot to select the blade angle for the most efficient performance.
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A precaution for the operation of an engine equipped with a constant-speed propeller is to
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avoid high manifold pressure settings with low RPM.
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The left turning tendency of an airplane caused by P-factor is the result of the
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propeller blade descending on the right, producing more thrust than the ascending blade on the left.
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When does P-factor cause the airplane to yaw to the left?
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When at high angles of attack.
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Who is primarily responsible for maintaining an aircraft in airworthy condition?
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Owner or operator.
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On aircraft equipped with fuel pumps, when is the auxiliary electric driven pump used?
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In the event engine-driven fuel pump fails.
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Detonation occurs in a reciprocating aircraft engine when
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the unburned charge in the cylinders explodes instead of burning normally.
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The uncontrolled firing of the fuel/air charge in advance of normal spark ignition is known as
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pre-ignition
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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
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fuel strainer drain and the fuel tank sumps.
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What change occurs in the fuel/air mixture when carburetor heat is applied?
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The fuel/air mixture becomes richer.
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Applying carb heat will
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enrich the fuel/air mixture
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What is one purpose for using reciprocating engines?
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They are relatively simple and inexpensive to operate.
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One purpose of the dual ignition system on an aircraft engine is to provide for
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improved engine performance
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If the ground wire between the magneto and the ignition switch becomes disconnected, the most noticeable result will be that the engine
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cannot be shut down by turning the switch to the OFF position.
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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
The fuel/air mixture may become excessively lean.
question
The presence of carburetor ice in an aircraft equipped with a fixed-pitch propeller can be verified by applying carburetor heat and noting
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a decrease in RPM and then a gradual increase in RPM.
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Carburetor ice can occur with an OAT as high as
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20 degrees C and high relative humidity.