AF256 test 1

Minimum radius for corner cutouts

1/2 inch

True or false a technician would reference the structural repair manual to see if the repair is major or minor

False

How many MS20470 AD-4-6 rivets will be required to attach a 10 x 5 inch plate, using a single row of rivets, minimum edge distance, and 4D spacing?

56

True or false octagon patch is preferred because it distributes structural loads

False

Shallow scratches in sheet metal may be repaired by

burnishing

5 steps for damage repair

1. Find size and type repair required 2. Find strength, thickness, and type of material 3. Inspect corrosion and load damage

A single-lap sheet splice is to be used to repair a section of damaged aluminum skin. If a double row of 1/8-inch rivets is used, the minimum allowable overlap will be

13/16 inch

Statement true regarding inspection of stressed skin metal wing assembly known to have critically loaded

If genuine, rivet tipping has occurred groups of consecutive rivet heads will be tipped in the same direction

What's metal fatigue

Results of metal being repeatedly subjected to periods of stress and relief within the limits of its own elasticity

What's true about stress risers

Any defect break or destruction of metal which causes stress in small metal?

Minimum edge distance for rivets

Twice the Diameter of the shank

Minimum spacing (pitch) for single row

Three times diameter of river shank

True or false Fundamental requirements of doing structural repair you want it to be stronger than original

False need to be original strength

Repairing small hole on metal stress, skin major consideration, and designing of patch should be

Shear strength of the riveted joint

Repairs or splices involving stringers on the lower surface of stressed skin metal wings are usually

permitted but are normally more critical in reference to strength in tension than similar repairs to the upper surface.

Aircraft structural units, such as spars, engine support, etc. which have been built up from sheet metal may be

Repairable using approved method

A factor which determines the minimum space between rivets is the

diameter of the rivets being used.

Monoque fuselage relies largely on the strength of

Skin or covering

Which part(s) of a semi-monocoque fuselage prevent(s) tension and compression from bending the fuselage?

longerons and stringers

A sheet metal repair is to be made using two pieces of 0.040-inch aluminum riveted together. All rivet holes are drilled for 3/32-inch rivets. The length of the rivets to be used will be

1/4 inch

Joggles in removed rivet shanks would indicate partial

shear failure

Type loads cause most rivet failures

Shear loads

Number of rivets required to repair crack 5.5" long on a piece of .040 stressed skin aluminum using AD470DD rivets

82

Dimension of a flush repair on .040 aluminum patch has 13 rivets in each row patch of 6RD the minimum edge distance rivets are MS20426AD

9.624 x 9.624

negligible damage

Surface damage that does not affect the structural integrity of the component involved.

Repairable by Patching

Span across damage I can be bridge across by a patch

Repairable by insertion

Cut damage out and put new piece of like metal in

Nonrepairable damage

Components, get replaced when location or extent of damage makes unrepairable