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ASA AMT general oral questions With 100- Correct Answers.pdf
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A&P Aviation Mechanic General OralQuestions Gary With 100% Correct
Answers
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,What are two reasons weight and balance control are important in an aircraft? - answers:Safety
of flight and most efficient operation of an aircraft.
Where is the center of gravity for most airplanes located in relation to the center of lift? -
answers:The CG is normally ahead of the center of lift.
What is meant by the datum that is used for weight and balance computations? - answers:It is a
readily identified reference chosen by the aircraft manufacturer from which all longitudinal
locations on the aircraft are referenced.
What is meant by moment in the computation of weight and balance? - answers:A force that
tends to cause rotation. It is the product of the weight of an object in pounds and the distance of
the object from the datum in inches.
What is meant by the arm of an item installed in an aircraft? - answers:The distance, in inches,
between the center of gravity of the item and the datum.
Where do you find the arm of an item installed on an aircraft? - answers:The Type Certificate
Data Sheets for the aircraft.
What is meant by a moment index? - answers:A moment divided by a constant such as 10, 100,
or 1,000.
What is meant by the center of gravity range? - answers:The distance in inches between the
forward allowable center of gravity and the rearward allowable center of gravity.
What is the significance of the empty weight center of gravity range of an aircraft? - answers:If
the empty weight center of gravity falls within the EWCG range, the aircraft cannot be legally
loaded in such a way that it's loaded center of gravity will fall outside of the allowable loaded
CG range. Not all aircraft have an EWCG range.
Why is the empty weight center of gravity range not given in the Type Certificate Data Sheets
for some aircraft? - answers:The empty weight center of gravity range is given only for aircraft
,that cannot be legally loaded in such a way that the loaded center of gravity will fall outside of
the allowable limits.
What is meant by the mean aerodynamic chord(MAC)? - answers:The chord of an imaginary
airfoil that has the same aerodynamic characteristics of an actual airfoil.
What is a loading envelope? - answers:The enclosed area on a graph of an airplane's loaded
weight and CG location. If lines drawn from the weight and CG cross within this envelope the
airplane is properly loaded.
What is meant by permanent ballast for an aircraft? - answers:Weight that is permanently
installed in an aircraft to bring the empty weight center of gravity into allowable limits.
Where must a record be kept of the current empty weight and the current center of gravity of an
aircraft? - answers:In the aircraft flight manual or weight and balance records required by 14
CFR § 23.1583.
Of what material are most low-pressure rigid fluid lines made? - answers:1100-1/2 hard or 3003-
1/2 hard aluminum alloy tubing.
Is the size of a rigid fluid line determined by its inside or its outside diameter? - answers:Outside
diameter.
When routing a fluid line parallel to an electrical wire bundle, which should be on top? -
answers:Electrical wire bundle.
How can you distinguish an AN fluid line fitting from an AC fitting? - answers:AN fitting has a
shoulder between the end of the flare cone and the first thread. AC fitting the threads extend all
the way to the flare cone.
How tight should an MS flareless fitting be tightened? - answers:Tighten the fitting by hand until
it is snug, and then turn it with the wrench for 1/6-turn to 1/3-turn. Never turn it more the 1/3-
turn.
, What damage can be caused by overtightening an MS flareless fitting? - answers:Overtightening
drives the cutting edge of the sleeve deep into the tube and weakens it.
What kind of rigid tubing can be flared with a double flare? - answers:5052-O and 6061-T
aluminum alloy tubing in sizes from 1/8-inch to 3/8-inch OD.
Of what material should rigid fluid lines be made that carry high-pressure(3,000 psi or greater)
hydraulic fluid? - answers:Annealed or 1/4-hard corrosion-resistant steel.
What is the difference between the flare angle for aircraft and automotive fittings? -
answers:Aircraft fittings have 37º flare angle and automotive fittings use 45º.
What should be done to the end of a tube that is to be flared? - answers:The cut end should be
polished to remove any sharp edges that could cause the tubing to crack.
What is the function of the lay line(the identification stripe) that runs the length of a flexible
hose? - answers:To show if the line was twisted during installation.
Where are quick-disconnect fluid line couplings normally used in an aircraft hydraulic system? -
answers:In the lines that connect the engine-driven pump into the hydraulic system.
Is the size of a flexible hose determined by its inside or its outside diameter? - answers:Inside
Diameter.
What is the minimum amount of slack that must be left when a flexible horse is installed in an
aircraft hydraulic system? - answers:The hose should be at least 5% longer than the distance
between fittings.
What is the principal advantage of Teflon hose for use in an aircraft hydraulic system? -
answers:Teflon hose retains its high strength under conditions of high temperature.
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