Finals Review - Materials
A DD rivet is heat treated before use to A. soften to facilitate riveting. B. harden and increase strength. C. relieve internal stresses.
A
The aluminum alloys used in aircraft construction are usually hardened by which method A. heat treatment. B. aging. C. cold working.
A
Under certain conditions, type A rivets are not used because of their A. low strength characteristics. B. tendency toward embrittlement when subjected to vibration. C. high alloy content.
A
What is the purpose of refrigerating 2017 and 2024 aluminum alloy rivets after heat treatment? A. to retard age hardening B. to relieve internal stresses C. to accelerate age hardening
A
What type of loads cause the most rivet failures? A. shear B. head C. bearing
A
Which is the force that tries to pull two sheets apart A. bearing B. torsion C. bending
A
Which rivet is used for riveting magnesium alloy structures? A. 5056 aluminum B. Monel C. mild steel
A
Which rivet may be used as received without further treatment? A. 2117-T3 B. 2017-T3 C. 2024-T4
A
Alloy 2117 rivets are heat treated A. to a temperature of 910 to 930°f and quenched in cold water. B. by the manufacturer and do not require heat treatment before being driven. C. by the manufacturer and require reheat treatment before being driven.
B
Clad aluminum alloys are used in aircraft because they A. are stronger than unclad aluminum alloys. B. are less subject to corrosion than uncoated aluminum alloys. C. can be heat treated much easier than the other forms of aluminum.
B
Heat treated rivets in the D and DD series that are not driven within the prescribed time after heat treatment or removalfrom refrigeration A. may be returned to refrigeration and used later without reheat treatment. B. must be reheat treated before use. C. must be discarded.
B
The identifying marks on the heads of aluminum alloy rivets indicate the A. degree of dimensional and process control observed during manufacture. B. specific alloy used in the manufacture of the rivets. C. head shape, shank size, material used, and specifications adhered to during manufacture.
B
A well designed rivet joint will subject the rivets to A .compressive loads. B. tension loads. c. shear loads
C
Annealing of aluminum A. increases the tensile strength. B. makes the material brittle. C. removes stresses caused by forming.
C
Joggles in removed rivet shanks would indicate partial A. bearing failure. B. torsion failure. C. shear failure.
C
Mild steel rivets are used for riveting A. nickel steel parts. B. magnesium parts. C. steel parts.
C
Most rivets used in aircraft repair have A. a raised dot. B. smooth heads without markings. C. dimples.
C
When fabricating parts from Alclad™ 2024-T3 aluminum sheet stock A. bends should be made with a small radius to develop maximum strength. B. all bends must be 90° to the grain. C. all scratches, kinks, tool marks, nicks, etc., must be held to a minimum.
C
