The most generally used metal for aircraft firewalls is stainless steel chrome.
The most generally used metal for aircraft firewalls is 2030 4130 1020.
Clad aluminum alloy has a coating of ____________________________ rolled
onto its surfaces to improve its corrosion resistance. aluminum pure aluminum 75% aluminum.
SAE 1020 steel has a carbon content of __________ %. 0.20 0.30 0.40.
Commercially pure aluminum is identified by the code number 1100 1020 1120.
Identify the series numbers for aluminum alloys that have the following major
alloys:
a. copper
b. magnesium
c. zinc a. 3xxx
b. 4xxx
c. 5xxx a. 2xxx
b. 5xxx
c. 7xxx a. 3xxx
b. 7xxx
c. 5xxx.
Titanium can be welded by using ________________ electric arc welding. inert gas gas oxygen.
The reference wood used for aircraft construction is natural wood sitka spruce pine.
Grade-A cotton fabric has a tensile strength of ______________ pounds per
inch. 90 75 80.
Polyester fabric is shrunk on an aircraft structure with heat treatment heat cooled.
Resins that are reinforced with glass filaments to make aircraft structural
components are __________________ resins. thermoplastic thermosetting.
Catalysts are used with __________________________ resins to cause them to cure. polyester epoxy.
Curing agents are used rather than catalysts when mixing __________________________ resins. polyester epoxy.
Glass cloth that is woven with both warp and fill threads is called
______________ cloth. bidirectional unidirectional.
Kevlar is _____________________ than fiberglass fabric of
equal strength. lighter heavier.
A pure metal, as distinguished from an alloy, _________ normally
hardened by heat treatment. is is not.
The form of heat treatment that hardens the surface of a metal while leaving
the core relatively soft and tough is called case hardening tempering normalizing.
The form of heat treatment that softens a metal is called annealing tempering normalizing.
The form of heat treatment that softens a metal is called normalizing tempering case hardening.
The form of heat treatment that removes some of the hardness from hardened
steel is called normalizing tempering annealing.
Two methods of case hardening steel are: a. hardening
b. tempering a. carburizing
b. nitriding a. nitriding
b. tempering.
A steel part is nitrided by heating it in an atmosphere containing
__________________________ gas. nitrogen inert ammonia.
Aluminum alloy is softened by heating it in an oven and cooling it rapidly slowly.
When an aluminum alloy part is heated in an oven and then quenched, it is
said to be ______________________ heat treated. treatment solution.
Artificial aging is done by holding a heat-treated aluminum alloy part at an
elevated temperature for a specified length of time. This process is called
_______________________________ heat treating. nitriding precipitation.
When an aluminum alloy part is removed from the heat treatment oven and
quenched, it is relatively soft. Over a period of a day or so, it increases its hard-
ness and strength. This process is called tempering aging carbonizing.
Steel is hardened by heating it to a specified temperature and then quenching
it in oil, water, or brine. The hardest and most brittle steel is obtained by
quenching it in ____________. brine solution brite.
A steel part may be made less brittle by heating it to a temperature quite a way
below its critical temperature and allowing it to cool in still air. This procedure
is called ________________________________ . carborizing tempering nitriding.
Fill in the code letter that is used to identify each of the following treatments
for aluminum alloy:
a. As fabricated with no control over its temper __________________________ .
b. Annealed ______________________________________________________ .
c. Solution heat treated _____________________________________________ .
d. Strain hardened _________________________________________________ . a. F
b. O
c. T
d. H a. H
b. O
c. F
d. T a. T
b. H
c. F
d. O.
Icebox rivets are aluminum alloy rivets that must be heat treated and stored in
a subfreezing refrigerator until they are driven. Two alloys of which icebox rivets
are made are ____________________ and __________________ . 2017, 2024 2027, 2024T 1027, 2017.
An aluminum alloy sheet that has a coating of commercially pure aluminum rolled onto its surface is called _____________________________ aluminum. clad pure alclad.
The aluminum alloy rivet that may be driven as it is received from the man-
ufacturer without having to be heat treated is made of alloy _______________________. 2117 2010 2024.
When a steel tubular fuselage is first welded, there are strains trapped in the
structure. To relieve these strains, the structure is heated to a temperature
above its critical temperature and allowed to cool in still air. This procedure is
called ___________________________________ . normalizing tempering hardening.
If too much time elapses between the removal of a piece of aluminum alloy
from the heat treatment oven and the time it is quenched, there is danger of
______________________________ corrosion forming inside the part. intergranurlar bonding superficial.
The method of nondestructive inspection that allows the inside of a structure to be inspected without requiring extensive disassembly is _____________________________________________ inspection. radiographic superficial magnetic.
Two types of radiographic inspection are:
a. _____________________________
b. _____________________________ a. x ray
b. gamma ray a. x ray
b. ultraviolet ray a. ultraviolet gay
b. gamma ray.
X-rays produced by low power are called _____________________________ X- rays. soft roughness soft - roughnes.
Anyone working with X-ray equipment should wear a _________________________________________ film badge. radiation monitor ratiation radiation screen.
A fault that does not extend to the surface _________________ be detected by magnetic particle inspection. can cannot.
Magnetic particle inspection can only be used to detect flaws in metals containing ________________________________________ . iron copper steel.
When the strongest possible magnetic field is required to inspect for a fault, the ________________________ method of inspection is used. continuous residual.
Small parts made of heat-treated steel are usually inspected by the ________________________ method of magnetic particle inspection. residual continuous.
A part that is magnetized by holding it in a coil, or solenoid, is magnetized ______________________________ . circularly longitudinally.
A part that is magnetized by passing magnetizing current through it is magnetized ______________________________ . circularly longitudinally.
When inspecting for faults that extend parallel to the length of the part, the part should be magnetized ___________________. circularly longitudinally.
When inspecting for faults that extend across a part, the part should be magnetized ______________________________ . longitudinally circularly.
Two types of magnetic medium that may be used to detect faults by the magnetic particle inspection method are:
a. _____________________________
b. _____________________________ a. dry powder
b. oxide suspended in a light oil a. oxide suspended in a light fuel
b. polyester.
A part is magnetized by holding it in a strong electromagnetic field produced
by ___________. AC DC.
A part is demagnetized by holding it in a decreasing magnetic field produced
by ___________. AC DC.
An indication of a fault detected by the magnetic particle inspection method that shows up as a rather fuzzy series of parallel lines is probably a/an ____________________________________ . inclusion exclusion.
The type of crack that gives the strongest indication in a magnetic particle inspection is a/an _______________________________ crack. fatigue torsion tension.
For a fault to be detected by the penetrant inspection method, it _____________ have to extend to the surface. does does not.
After the penetrant has been applied to the surface of a part and allowed to soak in, the surface of the part is washed and dried, and a/an
____________________________________ is applied. developer fusioner.
Dye-penetrant inspection _____________________ (can or cannot) be used to detect faults in nonmetallic materials. can cannot.
Faults are detected when using the fluorescent-penetrant inspection method by examining the part under a/an _______________ light. ultraviolet gamma x ray.
A porous material _______________ suited for inspection by the dye-penetrant method. is is not.
Abrasive blasting _______________ a good way to clean a part that is to be inspected by the dye-penetrant method. is is not.
One of the most effective methods for inspecting a part for intergranular corrosion is the __________________________ method. eddy current permanent dye.
The metallic ring test is used when inspecting bonded structure for indications of _______________________________ . delamination contamination.
After a structure is welded, it may be heated above its critical temperature and allowed to cool in still air. This procedure is used to
______________________________________ . relieve thougness relieve stresses.
If a welded joint is to be rewelded, all of the old weld bead must be _____________________ . removed posted.
Too rapid cooling of a weld can cause it to contract unevenly and stresses will remain in the metal. These stresses cause the metal to
______________________________________ . crack point.
Heat should be concentrated in the area being welded, and oxides that form on the base metal give an indication of the amount of heat put into the weld. When too much heat is used, the oxide will form out to a distance of more than ____________ inch from the weld. 1/2 1/4 3/8.
A properly made fillet weld has a penetration of _______ to _______% of the thickness of the base metal. 25, 50 50, 75 75, 100.
Refer to the figure below. Identify the illustration for each of these types of welds:
a. Cold weld with no penetration ____________________________
b. Bad weld with variations in penetration _____________________
c. Weld that was made too rapidly ___________________________
d. Weld made with an excess of acetylene _____________________ a. B
b. D
c. A
d. C a. D
b. A
c. C
d. B a. D
b. C
c. A
d. B.
The threads for most aircraft structural bolts have a class-____________ fit. 1 2 3.
Torque values listed for aircraft bolts normally consider the threads to be clean
and __________________. lubricated dry.
The accepted rule of thumb for installing bolts in an aircraft structure is to
have the bolt head ___________ (up or down), ___________________ (for-
ward, or rearward), and ___________________ (inboard or outboard). up, forward, outboard down, forward, inboard up, rearward, outboard.
A fiber-type self-locking nut should never be used on a bolt if the fastener is subject to _________________________________ . rotation lineal.
Identify the material of which the bolt is made when its head is marked with a/an:
a. cross or asterisk ________________________________
b. single dash ____________________________________
c. two dashes ____________________________________ a. nickel steel
b. corrosion-resistant steel
c. aluminum alloy a. aluminum alloy
b. corrosion-resistant steel
c. nickel steel a. corrosion-resistant steel
b. nickel steel
c. aluminum alloy.
A bolt whose head is identified with an asterisk enclosed in a triangle is a ____________________ bolt. close tolerance open tolerance.
A steel bolt with no marking on its head is made of __________________ steel and _____________ (is or is not) approved for use in aircraft structure. low-strengh, is not high-strengh, is not low-strengh, is.
The length of the unthreaded portion of a bolt shank is called the __________________ of the bolt. grip lenght bond lenght.
Clevis bolts are designed to be used for __________________ loads only. shear join.
Extraflexible control cable is made up of __________________ individual strands of wire. 133 79 132.
A swaged control cable terminal grips the cable with a strength equal to ________% of the strength of the cable. 100 75 80.
To be sure that the terminal ends are screwed into a turnbuckle barrel enough to produce the maximum strength, there must be no more than _________________ (how many) threads showing on either end of the barrel. 1 2 3.
When safetying a turnbuckle, the ends of the safety wire must be wrapped around the terminal end for at least __________________ (how many) turns. 2 3 4.
Identify the material of which solid rivets are made which have the following
head markings:
a. raised dot ______________________________________
b. recessed dot ____________________________________
c. raised double dash _______________________________
d. raised cross ____________________________________ a. 2017T
b. 2117T
c. 2024T
d. 5056T a. 5056T
b. 2017T
c. 2024T
d. 2117T a. 2117T
b. 2024T
c. 5056T
d. 2017T.
Give the diameter and length of these solid rivets:
a. MS20470AD4-4 Diameter _______ in. Length _______ in.
b. MS20426DD4-6 Diameter _______ in. Length _______ in.
c. MS20470D6-8 Diameter _______ in. Length _______ in.
d. MS20426AD6-10 Diameter _______ in. Length _______ in. a. 1/8, 1/4
b. 3/16, 5/8
c. 1/8, 3/8
d. 3/16, 1/2 a. 1/8, 1/4
b. 1/8, 3/8
c. 3/16, 1/2
d. 3/16, 5/8 a. 1/8, 3/8
b. 3/16, 1/2
c. 1/8, 1/4
d. 3/16, 5/8.
Friction-lock self-plugging rivets ______________ (are or are not) approved for replacement of solid rivets on a size-for-size basis. are are not.
When it is necessary to provide a threaded hole in a piece of thin sheet metal, a ______________________________ may be used. Rivnut Revnut.
Hi-Shear pin rivets _______________ (may or may not) be used to replace steel aircraft bolts on a size-for-size basis. may may not.
Axle end-play can be measured with a/an ________________________________________ . dial indicator gauge indicator.
Refer to the figure below. This vernier micrometer caliper reads ___________ inch. 0.2792 0.2798 0.3748.
Refer to the figure below. This vernier caliper reads ___________ inches. 1.437 1.457 1.537.
A part may be checked for flatness by using a surface plate and a ________________________ . thickness gage dial indicator.
The vernier scale on a vernier micrometer caliper is used to give an indication of ___________ inch of spindle movement. 0.0001 0.001 0.00001.
A tool used to find the center of a shaft or other circle is the ______________________________ head of a combination set. center medium end.
The diameter of a small hole is measured with a _______________________ . small-hole gage big-hole gage.
The distance between the points of a pair of dividers is measured with a/an ________________________________________ . machinist's scale basic scale.
The accuracy of a micrometer caliper may be checked and calibrated by using ______________________________________ . gage blocks gage.
An engine crankpin may be measured for out-of-round by using a/an________________________________________ . micrometer caliper dial indicator gage.
The side clearance and end-gap clearance of a piston ring in a piston are measured using a/an ______________________________ . roughness gage thickness gage.
Crankshaft runout of a reciprocating engine may be measured with a/an________________________________________ . dial indicator gage indicator telescoping gage.
A dimensional inspection of the bushing in a rocker arm can be measured with a/an__________________________ and a/an ________________________________ . telescoping gage, micrometer caliper dial gage, micrometer caliper.
A reciprocating engine poppet valve can be measured for stretch by using a/an ________________________________________ gage. valve stretch dial gage.
Magnetic particle inspection is used primarily to detect distortion deep subsurface flaws flaws on or near the surface.
Liquid penetrant inspection methods may be used on which of the following?
1. porous plastics.
2. ferrous metals.
3. nonferrous metals.
4. smooth primer-sealed wood
5. nonporous plastics. 2, 3, 4. 1, 2, 3. 2, 3, 5.
Which of these nondestructive testing methods is suitable for the inspection of most metals, plastics, and ceramics for surface and subsurface defects? Eddy current inspection Magnetic particle inspection. Ultrasonic inspection.
Which of the following defects are not acceptable for metal lines?
1. Cracked flare
2. Seams
3. Dents in the heel of a bend less than 20 % of the diameter
4. Scratches/nicks on the inside of a bend less than 10 % of wall thickness
5. Dents in straight section that are 20 % of tube diameter 1, 2, 3,4, and 5. 1, 2, and 3. 1,2, 3, and 5.
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? Eddy current inspection. Ultrasonic inspection. Magnetic particle inspection.
What method of magnetic particle inspection is used most often to inspect aircraft parts for invisible cracks and other defects? Residual Inductance. Continuous.
How many of these factors are considered essential knowledge for x-ray exposure?
1. Processing of the film.
2. Material thickness and density.
3. Exposure distance and angle
4. Film characteristics. One Three Four.
The testing medium that is generally used in magnetic particle inspection utilizes a ferromagnetic material that has high permeability and low retentivity. low permeability and high retentivity. high permeability and high retentivity.
Which statement relating to the residual magnetizing inspection method is true? Subsurface discontinuities are made readily apparent It is used in practically all circular and longitudinal magnetizing procedures It may be used with steels which have been heat treated for stressed applications. .
A mechanic has completed a bonded honeycomb repair using the potted compound repair technique. What nondestructive testing method is used to determine soundness of the repair after the repair has cured? Eddy current test. Metallic ring test. Ultrasonic test.
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