FAA A&P Mechanics General Oral
and Practical Questions
A 24 volt lead-acid battery has how many cells? - ANS-It has 12 cells. Each cell is rated at 2
volts.
Briefly describe the method for acting a magnetic particle inspection. - ANS-Thoroughly easy
all grease, oil and dust from the metal component which ought to be of magnetic cloth such
as iron or steel. Magnetize the part and then apply the ferromagnetic debris, both held in
liquid suspension or in dry powder shape, to the place to be inspected. If a discontinuity is
gift, the magnetized particles will form a sample within the approximate shape of the
discontinuity
Briefly describe the steps to be taken when acting a dye penetrant inspection. -
ANS-Thoroughly easy the metallic surface, dry completely, and practice the penetrant.
Remove the penetrant from the floor, dry the part, and apply the developer. Inspect and
interpret the result
Define "clearance" as utilized in plane drawings - ANS-Clearance is the size given for suits
between transferring parts
Define "tolerance" as used in plane drawings - ANS-It is the sum of plus and minus
allowence figures whilst a size indicates an allowable version
Describe the system used to designate performance rating of aviation gasoline. - ANS-For
fuels below grade 100, octane numbers are used, which include 91/96. The gasoline is as
compared with combos of iso-octane and ordinary heptane. Thus , grade ninety one fuel has
the same knock characteristics as a blend of ninety one percent octane and nine percent
hexane. When two numbers are used, the firtst range is the lean combination overall
performance rating, whilst the second one range is the rich mixture performance rating.
For fuels above grade 100, the numbers represent the overall performance score of the
gasoline as compared to a hundred percentage Iso-octane. That is, its knock-loose power to
be had as compared with that available with natural iso-octane.
For the "Center of Gravity" (CG), what axis is of prime challenge? - ANS-The prime difficulty
is the longitudinal stability, or the fore and aft place of the CG alongside the longitudinal axis.
The CG vicinity with reference to the lateral axis (wing tip to wing tip) is also vital, but as a
ways as weight is concerned, the design of the aircraft assumes lateral symmetry.
Give examples of best square numbers. - ANS-4, nine, sixteen, 64, one hundred, 144, and
so on.
, How are battery cubicles covered against corrosion? - ANS-They are coated with unique
corrosion resistant paints consisting of bituminous paint
How are popular AN-type fluid line fittings identified? - ANS-AN fluid line fittings are coloured
either blue or black whilst AC kind fittings are commonly gray or yellow. AN fittings have
coarser threads than AC fittings, and in addition they have a small shoulder between the
threads and the flare cone. The AC fittings are completely threaded from the shoulder all of
the way to the flare cone.
How can a change to an aircraft drawing be identified? - ANS-They are typically listed in
columns, both next to the title block or at one nook of the drawing
How can the "general second" of an plane be determined whilst considering the load and
stability of the plane? - ANS-The overall second is plane weight improved through the
distance among the datum and plane CG. The CG of an plane can, consequently,
continually be discovered with the aid of dividing general second via total weight
How can the right "grip period" of a bolt be determined? - ANS-The grip duration is the
unthreaded portion of the bolt shank. Generally speaking, the grip length must equal the
entire thickness of the cloth being bolted collectively.
How do you explicit a decimal as a percentage? - ANS-Move the decimal two places to the
right and upload the percentage signal. For instance, .75 is 75% or .375 is 37.Five%
How is a ratio expressed? - ANS-A ratio can be expressed as a fraction or it may be written
the use of the colon (:) as the image for expressing ratio. Thus, the ratio 5/7 can be written
5:7
How is flexible hose sized? - ANS-By the inner diameter in sixteenths of an inch increments
How is metal tubing sized? - ANS-By out of doors diameter that is measured fractionally in
sixteenths of an inch, and via wall thickness measured in thousandths
How is pressure expressed in hydraulics and pneumatics? - ANS-It is expressed in kilos
consistent with square inch (psi)
How lengthy is a transient mechanic certificates in impact? - ANS-For a period of a hundred
and twenty days
How lengthy have to the report of a one hundred hour inspection be retained by the owner of
operator? - ANS-Until the paintings is repeated or outmoded by means of other paintings or
for 12 months after the one hundred hour inspection was executed
How many views are required to determine the form of an object? - ANS-Two views will not
usually decide the form of an object. If 3 views are given, all 3 have to be reviewed
and Practical Questions
A 24 volt lead-acid battery has how many cells? - ANS-It has 12 cells. Each cell is rated at 2
volts.
Briefly describe the method for acting a magnetic particle inspection. - ANS-Thoroughly easy
all grease, oil and dust from the metal component which ought to be of magnetic cloth such
as iron or steel. Magnetize the part and then apply the ferromagnetic debris, both held in
liquid suspension or in dry powder shape, to the place to be inspected. If a discontinuity is
gift, the magnetized particles will form a sample within the approximate shape of the
discontinuity
Briefly describe the steps to be taken when acting a dye penetrant inspection. -
ANS-Thoroughly easy the metallic surface, dry completely, and practice the penetrant.
Remove the penetrant from the floor, dry the part, and apply the developer. Inspect and
interpret the result
Define "clearance" as utilized in plane drawings - ANS-Clearance is the size given for suits
between transferring parts
Define "tolerance" as used in plane drawings - ANS-It is the sum of plus and minus
allowence figures whilst a size indicates an allowable version
Describe the system used to designate performance rating of aviation gasoline. - ANS-For
fuels below grade 100, octane numbers are used, which include 91/96. The gasoline is as
compared with combos of iso-octane and ordinary heptane. Thus , grade ninety one fuel has
the same knock characteristics as a blend of ninety one percent octane and nine percent
hexane. When two numbers are used, the firtst range is the lean combination overall
performance rating, whilst the second one range is the rich mixture performance rating.
For fuels above grade 100, the numbers represent the overall performance score of the
gasoline as compared to a hundred percentage Iso-octane. That is, its knock-loose power to
be had as compared with that available with natural iso-octane.
For the "Center of Gravity" (CG), what axis is of prime challenge? - ANS-The prime difficulty
is the longitudinal stability, or the fore and aft place of the CG alongside the longitudinal axis.
The CG vicinity with reference to the lateral axis (wing tip to wing tip) is also vital, but as a
ways as weight is concerned, the design of the aircraft assumes lateral symmetry.
Give examples of best square numbers. - ANS-4, nine, sixteen, 64, one hundred, 144, and
so on.
, How are battery cubicles covered against corrosion? - ANS-They are coated with unique
corrosion resistant paints consisting of bituminous paint
How are popular AN-type fluid line fittings identified? - ANS-AN fluid line fittings are coloured
either blue or black whilst AC kind fittings are commonly gray or yellow. AN fittings have
coarser threads than AC fittings, and in addition they have a small shoulder between the
threads and the flare cone. The AC fittings are completely threaded from the shoulder all of
the way to the flare cone.
How can a change to an aircraft drawing be identified? - ANS-They are typically listed in
columns, both next to the title block or at one nook of the drawing
How can the "general second" of an plane be determined whilst considering the load and
stability of the plane? - ANS-The overall second is plane weight improved through the
distance among the datum and plane CG. The CG of an plane can, consequently,
continually be discovered with the aid of dividing general second via total weight
How can the right "grip period" of a bolt be determined? - ANS-The grip duration is the
unthreaded portion of the bolt shank. Generally speaking, the grip length must equal the
entire thickness of the cloth being bolted collectively.
How do you explicit a decimal as a percentage? - ANS-Move the decimal two places to the
right and upload the percentage signal. For instance, .75 is 75% or .375 is 37.Five%
How is a ratio expressed? - ANS-A ratio can be expressed as a fraction or it may be written
the use of the colon (:) as the image for expressing ratio. Thus, the ratio 5/7 can be written
5:7
How is flexible hose sized? - ANS-By the inner diameter in sixteenths of an inch increments
How is metal tubing sized? - ANS-By out of doors diameter that is measured fractionally in
sixteenths of an inch, and via wall thickness measured in thousandths
How is pressure expressed in hydraulics and pneumatics? - ANS-It is expressed in kilos
consistent with square inch (psi)
How lengthy is a transient mechanic certificates in impact? - ANS-For a period of a hundred
and twenty days
How lengthy have to the report of a one hundred hour inspection be retained by the owner of
operator? - ANS-Until the paintings is repeated or outmoded by means of other paintings or
for 12 months after the one hundred hour inspection was executed
How many views are required to determine the form of an object? - ANS-Two views will not
usually decide the form of an object. If 3 views are given, all 3 have to be reviewed
