Sheet Metal and Non-Metallic Structures Flashcards
A well-designed rivet joint will subject the rivets to what?
shear loads.
A main difference between Lockbolt/Huckbolt tension and shear fasteners (other than their application) is the what?
number of locking collar grooves.
Alloy 2117 rivets are heat treated how?
by the manufacturer and do not require heat treatment before being driven.
The general rule for finding the proper rivet diameter is what?
three times the thickness of the thickest sheet.
The shop head of a rivet should be what?
one and one-half times the diameter of the rivet shank.
One of the main advantages of HI-LOK type fasteners over earlier generations is that what?
they can be installed with ordinary hand tools.
Which of the following is one advantage of HI-LOK fasteners?
Inability to be over-torqued.
The markings on the head of a Dzus fastener identify the what?
body diameter, type of head, and length of the fastener.
The Dzus turnlock fastener consists of a stud, grommet, and receptacle. The stud length is measured in what?
hundredths of an inch.
The Dzus turnlock fastener consists of a stud, grommet, and receptacle. The stud diameter is measured in what?
sixteenths of an inch.
Threaded rivets (rivnuts) are commonly used to what?
attach parts or components with screws to sheet metal.
The installation of CherryMAX and Olympic-Lok rivets is accomplished by utilizing what?
a pulling tool.
Hole filling fasteners (for example, MS20470 rivets) should not be used in composite structures primarily because of the what?
possibility of causing delamination.
Metal fasteners used with carbon/graphite composite structures…
must be constructed of material such as titanium or corrosion resistant steel.
Sandwich panels made of honeycomb construction are used on aircraft because this type of construction…
saves weight while not comprising strength.
Which of these methods may be used to inspect fiberglass/honeycomb structures for entrapped water?
X-ray and backlighting.
When balsa wood is used to replace a damaged honeycomb core, the plug should be cut so that…
the grain is perpendicular to the skin.
When repairing puncture-type damage to a metal-faced laminated honeycomb panel, the edges of the doubler should be tapered to…
100 times the thickness of the metal.
One of the best ways to assure that a properly prepared batch of matrix resin has been achieved is to what?
have mixed enough for a test sample.
How does acoustic emission testing detect defects in composite materials?
By picking up the “noise” of any deterioration that may be present.
When conducting a tap test on a composite panel, which of the following sounds would indicate delamination?
Dull thud.
What precaution, if any, should be taken to prevent corrosion inside a repaired metal honeycomb structure?
Paint the repair with a corrosion inhibitor and seal from the atmosphere.
One method of inspecting a laminated fiberglass structure that has been subjected to damage is to what?
strip the damaged area of all paint and shine a strong light through the structure.
When inspecting a composite panel using the ring test/tapping method, a dull thud may indicate what?
separation of the laminates.