AFAB 115 MIDTERM ACTUAL UPDATED QUESTIONS AND CORRECT ANSWERS
What is a technician important responsability Identifying and applying specifications within acceptable toleranceibility
What gives the aircraft the capability to withstand the strength of thousands of fasteners which hold it together
aerodynamic loads ?
What does the Strength of aircraft fasteners depends on? the technician's who drill and prepare the holes in which those fasteners are
installed.
What is fundamental for good joint performance and Clean, round holes within tolerance and with minimal burrs
durability
For most DOD manufacturers you must be certified by the manufacturer/employer to perform hole drilling operations
Tolerance is the plus or minus allowances in hole dimensions
Accurate holes can only occur if the drill is at a 90 degree angle
to the surface being drilled.
A drill or egg cup should be used to ensure a perpendicular drill.
To minimize fatigue, and enable fasteners to sit correctly, proper deburring,chamfering,and edge breaks
it is important that are performed.
To prevent delamination and breakout when drilling always support the material from the backside
composites you must
To minimize delamination when drilling in always keep the drill rotating as it touches
graphite/carbon the surface and during withdrawal.
or composites you must
How do protect Wire bundles and hydraulic lines when using drill stops
drilling ?
To check hole diameters and dimensions use a ball gauge and micrometer
What is important to note while drilling that a sharp drill it will produce large uniform chips
, technicians must Prevent all possible defects when generating holes and ensure product quality
and cost efficiency
Why is accurate hole drilling so important Because as holes are added to the aircraft structure they can weaken the
structure in which they are drilled
How is a rivet made ? with a manufactured head on one side, and
another head called a buck tail, or shop head on the other.
What should the length of the rivet equal the sum of the thickness of the metal plus 1 1/2 times the diameter of the rivet
1 1/2 x D + G = L
1 1/2 x D + G = L what does each initial in this equation D = the rivet diameter,
stand for ? G = the grip length
(total thickness of material)
L = shank length of the rivet.
Rivets < 3/32 of an inch in diameter any structural parts
should not be used for
what is the minimum rivet diameter at least equal to the thickness of the thickest sheet being riveted
what is the maximum rivet diameter 3x the thickness of the thickest sheet to be riveted
is it ok to mix rivets never
minimum rivet pitch 3D
Maximum river pitch 12D
Minimum edge distance for a universal (button) head 2D
rivet ?
Minimum edge distance for a flush head rivet 2.5 D
What is rivet pitch The distance between rivets in the same row
the steps involved in planning and executing a proper layout, installation and inspection
riveted joint for structural repair
what is take-up the ability of a fastener to bring two pieces of material together
What is a technician important responsability Identifying and applying specifications within acceptable toleranceibility
What gives the aircraft the capability to withstand the strength of thousands of fasteners which hold it together
aerodynamic loads ?
What does the Strength of aircraft fasteners depends on? the technician's who drill and prepare the holes in which those fasteners are
installed.
What is fundamental for good joint performance and Clean, round holes within tolerance and with minimal burrs
durability
For most DOD manufacturers you must be certified by the manufacturer/employer to perform hole drilling operations
Tolerance is the plus or minus allowances in hole dimensions
Accurate holes can only occur if the drill is at a 90 degree angle
to the surface being drilled.
A drill or egg cup should be used to ensure a perpendicular drill.
To minimize fatigue, and enable fasteners to sit correctly, proper deburring,chamfering,and edge breaks
it is important that are performed.
To prevent delamination and breakout when drilling always support the material from the backside
composites you must
To minimize delamination when drilling in always keep the drill rotating as it touches
graphite/carbon the surface and during withdrawal.
or composites you must
How do protect Wire bundles and hydraulic lines when using drill stops
drilling ?
To check hole diameters and dimensions use a ball gauge and micrometer
What is important to note while drilling that a sharp drill it will produce large uniform chips
, technicians must Prevent all possible defects when generating holes and ensure product quality
and cost efficiency
Why is accurate hole drilling so important Because as holes are added to the aircraft structure they can weaken the
structure in which they are drilled
How is a rivet made ? with a manufactured head on one side, and
another head called a buck tail, or shop head on the other.
What should the length of the rivet equal the sum of the thickness of the metal plus 1 1/2 times the diameter of the rivet
1 1/2 x D + G = L
1 1/2 x D + G = L what does each initial in this equation D = the rivet diameter,
stand for ? G = the grip length
(total thickness of material)
L = shank length of the rivet.
Rivets < 3/32 of an inch in diameter any structural parts
should not be used for
what is the minimum rivet diameter at least equal to the thickness of the thickest sheet being riveted
what is the maximum rivet diameter 3x the thickness of the thickest sheet to be riveted
is it ok to mix rivets never
minimum rivet pitch 3D
Maximum river pitch 12D
Minimum edge distance for a universal (button) head 2D
rivet ?
Minimum edge distance for a flush head rivet 2.5 D
What is rivet pitch The distance between rivets in the same row
the steps involved in planning and executing a proper layout, installation and inspection
riveted joint for structural repair
what is take-up the ability of a fastener to bring two pieces of material together
