Materials & Processes (2)

Generally speaking, bolt grip lengths should be a. Equal to the thickness of the material which is fastened together, plus approximately one diameter b. Equal to the thickness of the material which is fastened together c. One and one half times the thickness of the material which is fastened together

Which of the following describe the effects of annealing steel and aluminum alloys? • Decrease in internal stress • Softening of the metal • Improved corrosion resistance a. 1,2 b. 1,3 c. 2,3

A bolt with an X inside a triangle on the head is classified as an a. NAS standard aircraft bolt b. NAS close tolerance bolt c. AN corrosion-resistant steel bolt

When checking an item with the magnetic particle inspection method, circular and longitudinal magnetization should be used to a. Reveal all possible defects b. Evenly magnetize the entire part c. Ensure uniform current flow

Unless otherwise specified or required, aircraft bolts should be installed so that the bolthead is a. Upward, or in rearward direction b. Upward, or in a forward direction c. Downward, or in a forward direction

(1) An aircraft part may be demagnetized by subjecting it to a magnetizing force from alternating current that is gradually reduced in strength (2) An aircraft part may be demagnetized by subjecting it to a magnetizing force from direct current that is alternately reversed in direction and gradually reduced in strength Regarding the above statements, a. Both No. 1 and No. 2 are true b. Only No.2 is true c. Only No.1 is true

The society of Automotive Engineers (SAE) and the American Iron and Steel Institute use a numerical index system to identify the composition of various steels. In the number ‘4130’ designating chromium molybdenum steel, the first digit indicates the a. Percentage of the basic element in the alloy b. Percentage of carbon in the alloy in hundredths of a percent c. Basic alloying element

Which of the following occurs when a mechanical force is repeatedly applied to most metals at room temperature, such as rolling, hammering, or bending? • The metals become artificially aged. • The metals become stress corrosion cracked • The metals become cold worked, strain or work hardened a. 2 b. 1 and 3 c. 3.

Which of the following materials may be inspected using the magnetic particle inspection method? • Magnesium alloys • Aluminum alloys • Iron alloys • Copper alloys • Zinc alloys a. 1,2,3 b. 1,2,3,4 c. 3

What is steel tempered after being hardened a. To increase its hardness and ductility b. To increase its strength and decrease its internal stresses c. To relieve its internal stresses and reduce its brittleness

Which condition indicates a part has cooled too quickly after being welded? a. Cracking adjacent to the weld b. Discoloration of the base metal c. Gas pockets, porosity, and slag inclusions

How is the locking feature of the fiber-type locknut obtained? a. By the use of an unthreaded fiber locking insert b. By a fiber insert held firmly in place at the base of the load carrying section c. By making the threads in the fiber insert slightly smaller than those in the load carrying section

Which material cannot be heat treated repeatedly without harmful effects? a. Unclad aluminum alloy in sheet form b. 6061-T9 c. Clad aluminum alloy

Which number represents the Vernier scale graduation of a micrometer? a. .00001 b. .001 c. .0001

Identify the correct statement a. An outside micrometer is limited to measuring diameters b. Tools used on certificated aircraft must be an approved type c. Dividers do not provide a reading when used as measuring device

One characteristics of a good weld is that no oxide should be formed on the base metal at a distance from the weld of more than a. ½ inch b. 1 inch c. ¼ inch

Which statement regarding aircraft bolts is correct? a. When tightening castellated nuts on drilled bolts, if the cotter pin holes do not line up, it is permissible to overtighten the nut to permit alignment of the next slot with the cotter pin hole b. In general, bolt grip lengths should equal the material thickness c. Alloy steel bolts smaller than ¼-inch diameter should not be used in primary structure

What is generally used in the construction of aircraft engine firewalls? a. Stainless steel b. Chrome-molybdenum alloy steel c. Titanium nickel alloy

Why is it considered good practice to normalize a part after welding? a. To relieve internal stresses developed within the base metal b. To increase the hardness of the weld c. To remove the surface scale formed during welding

Aircraft bolts are usually manufactured with a a. Class 1 fit for the threads b. Class 2 fit for the threads c. Class 3 fit for the threads

A fiber-type, self-locking nut must never be used on an aircraft if the bolt is a. Under shear loading b. Under tension loading c. Subject to rotation

The aluminum code number 1100 identifies what type of aluminum a. Aluminum alloy containing 11 percent copper b. Aluminum alloy containing zinc c. 99 percent commercially pure aluminum

Magnetic particle inspection is used primarily to detect a. Distortion b. Deep surface flaws c. Flaws on or near the surface

The clearance between the piston rings and the ring lands is measured with a a. Micrometer calliper b. Thickness gauge c. Depth gauge