Materials and Processes Flashcards
- 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 1/4-inch diameter should not be used in primary structure
b. In general, bolt grip lengths should equal the material thickness
- What two types of indicating mediums are available for magnetic particle inspection?
a. Iron and ferric oxides
b. Wet and dry process materials
c. High retentivity and low permeability material
b. Wet and dry process materials
- What precision measuring tool is used for measuring crankpin and main bearing journals for out-of-round wear?
a. Dial gauge
b. Micrometer caliper
c. Depth gauge
b. Micrometer caliper
- How many of these factors are considered essential knowledge for x-ray exposure?
- Processing of the film
- Material thickness and density
- Exposure distance and angle
- Film characteristics
a. One
b. Three
c. Four
b. Three
- On a fillet weld, the penetration requirement includes what percentage(s) of the base metal thickness?
a. 100 percent
b. 25 - 50 percent
c. 60 - 80 percent
b. 25 - 50 percent
- What is descriptive of the annealing process of steel during after it has been annealed?
a. Rapid cooling; high strength
b. Slow cooling; low strength
c. Slow cooling; increased resistance to wear
b. Slow cooling; low strength
- Which tool can be used to determine piston pin out-of-round wear?
a. Telescopic gauge
b. Micrometer caliper
c. Dial indicator
b. Micrometer caliper
- What nondestructive testing method requires little or no part preparation, is used to detect surface or near-surface defects in most metals, and may also be used to separate metals or alloys and their heat-treat conditions?
a. Eddy current inspection
b. Ultrasonic inspection
c. Magnetic particle inspection
a. Eddy current inspection
- Which of the following is a main determinant of the dwell time to use when conducting a dye r fluorescent penetrant inspection?
a. The size and shape of the discontinuities being looked for
b. The size and shape of the part being inspected
c. The type and/or density of the part material
a. The size and shape of the discontinuities being looked for
- In examining and evaluating a welded joint, a mechanic should be familiar with
a. Likely ambient exposure conditions and intended use of the part, along with type of weld and original part material composition
b. The welding technique, filler material, and temperature range used
c. The parts, proportions, and formation of a weld
a. Likely ambient exposure conditions and intended use of the part, along with type of weld and original part material composition
- Circular magnetization of a part can be used to detect which defects?
a. Defects parallel to the long axis of the part
b. Defects perpendicular to the long axis of the part
c. Defects perpendicular to the concentric circles of magnetic force within the part
a. Defects parallel to the long axis of the part
- (1) In nondestructive testing a discontinuity may be defined as an interruption in the normal physical structure or configuration of a part
(2) A discontinuity may or may not affect the usefulness of a part
Regarding the above statements,
a. Only No. 1 is true
b. Only No. 2 is true
c. Both No. 1 and No. 2 are true
c. Both No. 1 and No. 2 are true
- Which statement relating to the residual magnetizing inspection method is true?
a. Subsurface discontinuities are made readily apparent
b. It is used in practically all circular and longitudinal magnetizing procedures
c. It may be used with steels which have been heat treated for stressed applications
c. It may be used with steels which have been heat treated for stressed applications
- Which of the following defects are not acceptable for metal lines?
- Cracked flare
- Seams
- Dents in the heel of a bend less than 20% of the diameter
- Scratches/nicks on the inside of a bend less than 10% of wall thickness
- Dents in straight section that are 20% of tube diameter
a. 1,2,3,4 and 5
b. 1,2 and 3
c. 1,2,3 and 5
c. 1,2,3 and 5
- If dye penetrant inspection indications are not sharp and clear, the most cause is that part
a. Was not correctly degaussed before the developer was applied
b. Has no appreciable damage
c. Was not thoroughly washed before the developer was applied
c. Was not thoroughly washed before the developer was applied
- Which heat-treating operation would be performed when the surface of the metal is changed chemically by introducing a high carbide or nitride content?
a. Tempering
b. Normalizing
c. Case hardening
c. Case hardening
- Unless otherwise specified, torque values for tightening aircraft nuts and bolts relate to
a. Clean, dry threads
b. Clean, lightly oiled threads
c. Both dry and lightly oiled threads
a. Clean, dry threads
- 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
a. By the use of an unthreaded fiber locking insert
- When the specific torque value for nuts is not given, where can the recommended torque value be found?
a. AC 43. 13-1B
b. Technical Standard Order
c. AC43. 13-2A
a. AC 43. 13-1B
- If it is necessary to accurately measure the diameter of a hole approximately 1/4 inch in diameter, the mechanic should use a
a. Telescoping gauge and determine the size of the hole by taking a micrometer reading of the adjustable end of the telescoping gauge
b. 0 - to 1-inch inside the micrometer and read the measurement directly from the micrometer
c. Small-hole gauge and determine the size of the hole by taking a micrometer reading of the ball end of the gauge
c. Small-hole gauge and determine the size of the hole by taking a micrometer reading of the ball end of the gauge
- In performing a dye penetrant inspection, the developer
a. Seeps into a surface crack to indicate the presence of a defect
b. Acts as a blotter to produce a visible indication
c. Thoroughly cleans the surface prior to inspection
b. Acts as a blotter to produce a visible indication
- 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
b. NAS close tolerance bolt
- Which heat-treating process of metal produces a hard, wear-resistant surface over a strong, tough core?
a. Case hardening
b. Annealing
c. Tempering
a. Case hardening
- Alclad is a metal consisting of
a. Aluminum alloy surface layers and a pure aluminum core
b. Pure aluminum surface layers on an aluminum alloy core
c. A homogeneous mixture of pure aluminum and aluminum alloy
b. Pure aluminum surface layers on an aluminum alloy core
- 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
c. 3
- 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
b. Upward, 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 No. 2 are true
b. Only No. 2 is true
c. Only No. 1 is true
a. Both No. 1 and No. 2 are 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
c. Basic alloying element
- 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. 1,2
- What method of magnetic particle inspection is used most often to inspect aircraft parts for invisible cracks and other defects?
a. Residual
b. Inductance
c. Continuous
c. Continuous
- What aluminum alloy designations indicate that the metal has received no hardening or tempering treatment
a. 3003-F
b. 5052-H36
c. 6061-O
a. 3003-F
- 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
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
a. Cracking adjacent to the weld
- 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
a. By the use of an unthreaded fiber locking insert