Materials and Proccesses Questions

Return to General Aviation

Chapter 7 Section A; Metals

1) Metal in which iron is the chief ingredient is called a(n) ___________

2) Low carbon steel contains less than ___________ hundredths of one percent carbon.

3) High carbon steel contains above ___________ hundredths of one percent carbon.

4) The ability to withstand tension is called ___________ strength.

5) The stress that causes a metal to deform is called its ___________ strength.

6) The ability of a metal to resist cuttin, penetration, or abrasion is its ___________.

7) The ability of a metal to be bent, formed, or shaped with out cracking is called ___________.

8) The ability of a metal to be shaped by drawing or pulling is called its ___________.

9) The characteristic of a metal to shatter when it is bent is called ___________.

10) Most metals are ___________ (good or poor) conductors of heat.

11) Metals will ___________ (expand or contract) when they are heated.

12) The ability of a material to return to its original shape and size after the deforming force is removed is called ___________.

13) Density is the ___________ per ___________ ___________ of a material.

14) The strength of aluminum is increased considerably when other compatible metals are added to it. The process is known as ___________.

15) The 1000 series of aluminum designations represents commercially pure aluminum of ___________ % or higher purity.

16) What is the major alloying element in the 2000 series aluminum? ___________

17) The 5000 series aluminum alloys have ___________ as their major alloying element.

18) Write Beside each aluminum alloy designation whether it is heat-treatable or non heat-treatable.
a) 1100 = ___________
b) 5052 = ___________
c) 2024 = ___________
d) 7075 = ___________

19) Alclad is a pure ___________ coating which is applied to the surface of heat-treated aluminum alloy sheets for corrosion control.

20) Softening a metal by heating it and cooling it slowly is called ___________.

21) Heating an aluminum alloy to its critical temperature and quenching it in cold water is known as ___________ (precipitation or solution) heat treating.

22) Heating an aluminum alloy to a temperature well below its critical temperature and holding it there for a period of time is known as artificial aging or ___________ (precipitation or solution) heat treating.

23) Mechanically working metals below their critical range is known as cold working or ___________ hardening.

24) The limit to which the number of times alclad aluminum may be reheat-treated is limited due to increased ___________ of the core material into the cladding with each heat treatment.

25) The letter designation 'O' following an alloy designation means that the metal is ___________.

26) Place the appropriate letter beside each temper designation for aluminum alloys.
a) ___________ As-fabricated
b) ___________ Solution heat treated followed by strain hardening
c) ___________ Solution heat treated followed by natural aging
d) ___________ Solution heat treated followed by artificial aging
e) ___________ Strain hardened to 1/4 hard condition

27) According to the list of alloying agents for use with magnesium in figure 7-4 on page 7-10 of your general textbook, what letter is used to indicate each of the following agents:
a) Aluminum = ___________
b) Thorium = ___________
c) Zinc = ___________

28) Never attempt to use ___________ to extinguish a magnesium fire.

29) Titanium alloy is capable of maintaining its strength at temperature up to ___________ degrees F.

30) Monel is composed primarily of ___________ and ___________.

31) Inconel is composed primarily of ___________ and ___________.

32) Brass is composed primarily of ___________ and ___________.

33) Bronze is composed primarily of ___________ and ___________.

34) The most familiar steel to the aviation maintenance technician is SAE ___________ steel.

35) Stainless steel is a classification of corrosion resistant steels that have large amounts of ___________ and ___________ alloyed with the steel.

36) The 300 series of stainless steel ___________ (can or cannot) be hardened by heat treating.

37) The 400 series of stainless steel ___________ (can or cannot) be hardened by heat treating.

38) Iron can exist in three solid structural forms depending upon its temperature:
a) Up to 1,666 degrees F it is in its ___________ form.
b) Between 1,666 and 2,554 degrees F it is in its ___________ form.
c) Between 2,554 and 2,800 degrees F it is in its ___________ form.

39) If steel is heated to a temperature slightly above its critical temperature and then allowed to cool very slowly, it will be ___________ (hardened or softened)

40) What medium is used to provide the slowest quench when heat treating steel? ___________

41) Some of the hardness may be drawn out of steel after it has been hardened using a process known as ___________.

42) Using the chart in figure 7-7 on page 7-16 of your General Textbook, what would be the temperature of a piece of steel that is glowing bright red ___________ degrees F.

43) The two basic methods of case hardening steel are:
a) ___________
b) ___________

44) There are three methods of carburizing steel. They are:
a) ___________
b) ___________
c) ___________

45) The nitrogen which unites with the nitride formers in steel that is being case hardened by nitriding comes from ___________ gas.

46) There ___________ (is or is not) a definite relationship between strength and hardness of steel.

47) A Brinell hardness tester measures the ___________ (depth or diameter) of the impression made by the penetrator.

48) The Rockwell hardness tester measures the ___________ (depth or diameter) or the impression made by the penetrator.

Chapter 7 Section B; Nonmetallic Materials

1) What are the three basic types of wood used for aircraft structure?
a) ___________
b) ___________
c) ___________

2) The referance wood chosen by the FAA for aircraft construction is ______________________.

3) Wood used in aircraft structural construction or repair must not have a grain deviation of more than one inch in ___________ inches.

4) There are two basic types of resins used in aircraft plastics. They are:
a) ___________
b) ___________

5) A resin that is normally hard, but which will soften when it is heated, is called a thermo- ___________ (plastic or setting) resin.

6) Most of the reinforced plastic material used for structural applications are of the thermo- ___________ (plastic or setting) type.

7) A thick layer of polyester resin will require ___________ (more or less) time to cure than a thin layer.

8) A familiar thixotropic agent used in aviation maintenance is ___________.

9) O-rings will seal effectively in ___________ (one or both) direction(s).

10) When an O-ring is used in a high pressure system ___________ rings may be installed with it.

11) V-ring packings are one-way seals and should always be installed with the open end of the 'V' ___________ (facing or away from) the pressure.

12) U-ring packings are used normally with pressures ___________ (more or less) than 1,000 psi.

13) Shock absorber cord manufactured during April of 1991 would carry what color code? ___________

14) ___________ are used to clean and lubricate the exposed portions of piston shafts.

Chapter 8 Section A; Rivets

1) Fill in the names for each of the abberviations used for aircraft material standards:
a) SAE = ___________
b) AN = ___________
c) MS = ___________
d) NAS = ___________

2) Identify the aluminum alloy used for each reivet as indicated by the mark on the rivet head.
a) Plain = ___________
b) Raised Cross = ___________
c) Dimple = ___________
d) Raised Dot = ___________
e) Two Raised Dashes = ___________
f) Raised Ring = ___________

3) Identify the aluminum alloy indicated by each of these letter designations.
a) A = ___________
b) AD = ___________
c) B = ___________
d) DD = ___________
e) E = ___________

4) Match the head shape of the aircraft rivets with their AN or MS number
a) Countersunk = ___________
b) Brazier Head = ___________
c) Flat Head = ___________
d) Round Head = ___________

5) Rivet shank diameters are measured in increments of ___________ inch.

6) Rivet Length is measured in increments of ___________ inch.

7) Which measurements are correct for determining the length of an aircraft rivet? (See Picture on page 8-2 of the work book)
a) Length = ___________ (a or b)
b) Length = ___________ (a or b)

8) Rivets that install from one side are called ___________ rivets.

9) CherryLOCK rivets use a ___________ ___________ to lock the shank into the stem.

10) The CherryMAX rivet was designed for installation using ___________ tooling.

11) Some special rivets can be used ___________ for ___________ as replacements for solid rivets.

12) One of the earliest forms of blind rivet was the cherry rivet with a ___________ locked stem.

13) POP rivets are ___________ used in aircraft structure.

14) Blind rivets are generally avaiable in ___________ and ___________ head styles.

15) Pulling stems are ___________ to provide a non-slip grip for the pulling head.

16) What name was given to a threaded rivet developed to attach rubber deicer boots to aircraft? ___________

Chapter 8 Section B; Aircraft Fasteners

1) Fill in the names for each of the abbreviations used for thread type:
a) NC = ___________
b) NF = ___________
c) UNC = ___________
d) UNF = ___________

2) Thread fits are identified by both a class number and a description of the type of fit. For each class below, indicate the type of fit.
a) Class 1 = ___________
b) Class 2 = ___________
c) Class 3 = ___________
d) Class 4 = ___________

3) A Class ___________ fit allows you to turn the nut all the way down using nothing but your fingers.

4) A Class ___________ and ___________ fit requires a wrench to turn the nut down from start to finish.

5) Identify the material indicated by the mark on the head of each of the aircraft bolts. (See picture on page 8-4 of the workbook)
a) ___________
b) ___________
c) ___________
d) ___________

6) Give the diameter of each of these aircraft bolts.
a) AN4 = ___________ inch
b) AN8 = ___________ inch
c) AN12 = ___________ inch
d) AN16 = ___________ inch

7) Give the length of each of these aircraft bolts.
a) AN4-6 = ___________ inch
b) AN8-12 = ___________ inch
c) AN12-10 = ___________ inch
d) AN16-34 = ___________ inch

8) The smallest diameter steel bolt that is allowed for use in an aircraft structure is ___________ inch

9) The smallest diameter aluminum alloy bolt that is allowed for use in an aircraft structure is ___________ inch.

10) Which of these bolts has a hole drilled in its shank for a cotter pin? ___________
a) AN8-12
b) AN8A-12
c) AN8-12A

11) Which of these bolts has a hole drilled across the flats of its head, through which safety wire can be passed? Which of these bolts has coarse threads? ___________
a) AN 6-12A
b) AN 6H-12
c) AN 6C12A

12) Which of these bolts has coarse threads? ___________
a) AN 75-42
b) AN 26-14A
c) AN 75A-44

13) Which of these bolts would be identified by a triangle around the asterisk on its head? ___________
a) AN 76-12
b) AN 26-12
c) AN 176-12

14) What kind of protection is on the shank of an AN 176-12 bolt? ___________
a) Cadmium Plating
b) Grease
c) Colored Lacquer

15) Which of these bolts would be approved for a shear load but not for a tensile load? ___________
a) AN 76-12
b) AN 6-12
c) AN 26-12

16) Which of these clevis bolts would require a self-locking shear nut? ___________
a) AN 25-8
b) AN 25-8A

17) Give the diameter and length of each of these clevis bolts.

Bolt Diameter (inches) Length (inches)
AN 24-8 ___________ ___________
AN 26-16 ___________ ___________
AN 30-32 ___________ ___________
AN 36-24 ___________ ___________

18) An acronym to help remember the proper direction for bolt installation is IDA; this means that the bolt shank should be pointed ___________, ___________, or ___________.

19) Match the proper AN number with the nuts described in the first column.

AN # Nut Type Answers
345 a) Aircraft castle nut ___________
350 b) Shear castle nut ___________
310 c) Aircraft plain nut ___________
320 d) Aircraft check nut ___________
355 e) Wing nut ___________
315 f) Machine screw nut, fine thread ___________
316 g) Slotted engine nut ___________

20) Which bolt would be used with an AN 310-6 nut? ___________
a) AN 6-12A
b) AN 26-14
c) AN 6-12

21) Which of these nuts is approved for use on engines, but not for use on airframes? ___________
a) AN 310
b) AN 320
c) AN 355

22) Which of these nuts is a high temperature self-locking nut? ___________
a) AN 350
b) AN 363
c) AN 365

23) Machine screws normally have a Class ___________ fit.

24) Match these machine screws with their specification number.

AN # Screw Type Answers
520 82 degree countersunk head, fine thread ___________
526 82 degree countersunk head, coarse thread ___________
507 100 degree countersunk head, fine and coarse thread ___________
515 Round head, coarse thread ___________
505 Round head, fine thread ___________
510 Truss head ___________

25) A type ___________ (A or B) self-tapping screw has a sharp point.

26) What holds a rollpin in its hole? ___________________________________________________________________

27) The length of a cotter pin is measured to its ___________ (long or short) end.

28) Match these washers with their proper specification number.

AN/MS # Washer Type Answers
936 Plain Washer ___________
960 Large-area washer ___________
20002 Split lock washer ___________
935 Shake-proof lock washer ___________
970 High-strength countersunk washer ___________

29) Which washer would be thicker? ___________
a) AN 960-416
b) AN 960-416L

30) Identify the types of steel control cable with the number of wires that are used to make up the cable.
a) Flexible = ___________
b) Non-Flexible = ___________
c) Extra-Flexible = ___________

31) A properly installed control cable terminal of each of these types will have a strength of what percent of the cable breaking strength?
a) Swaged Terminal = ___________ %
b) Nicopress Sleeve = ___________ %
c) Woven Five-Tuck Splice = ___________ %

32) A swaged terminal can be checked for proper swaging used a ___________ gauge.

33) Label the proper sequence for making the three squeezes required to properly install a nicropress sleeve. (See page 8-8 in the workbook)
a) First = ___________
b) Second = ___________
c) Third = ___________

34) For a turnbuckle to develop the full strength of the control cable, there must not be more than ___________ threads of the ends exposed from the barrel.

35) What size and type of lock wire would be properly used to safety each of these types of turnbuckles?

Cable Size Type of Wrap Diameter Material
1/16 Single ___________ ___________
1/8 Single ___________ ___________
1/8 Double ___________ ___________
5/32 Single ___________ ___________
5/32 Double ___________ ___________

36) When terminating the safety wiring of a turnbuckle, the wire must be wrapped around the shank for at least ___________ turn(s) before it is cut off.

37) The preferred method of securing a cotter pin through a drilled bolt and castellated nut is to spread the key and bend it _______________________________________ (Over the end of the bolt or around the nut.)

Unless otherwise stated, the content of this page is licensed under Creative Commons Attribution-ShareAlike 3.0 License