T 2026 Aircraft Materials and Processes

d. Carbon

A black fiber that is very strong, stiff, and used primarily for its rigid strength characteristics.

a. Aramid

b. Titanium

c. Fiberglass

d. Carbon

a. Compression failure

A faint line running across the grain of a wood spar generally indicates

a. Compression failure

b. Shear failure

c. Decay

d. Bending failure

d. A bolt of equivalent size

A strength of a pin (hi-shear) is equivalent to

a. A 2024 rivet

b. A hi-lock

c. A lockbolt

d. A bolt of equivalent size

c. 5/16 inch

A sheet metal repair is to be made using two pieces of 0.0625-inch aluminum riveted together. All rivet holes are drilled for 1/8-inch rivets. The length of the rivets to be used will be

a. 5/32 inch

b. 3/16 inch

c. 5/16 inch

d. 3/8 inch

a. a volatile petroleum-based solvent

A part which is being prepared for dye penetrant inspection should be cleaned with

a. a volatile petroleum-based solvent

b. a penetrant developer

c. water-base solvents only

d. vegetable-base solvents only

c. +30.30 STA

An aircraft with an empty weight of 1,500 pounds and an empty weight CG of +28.4 was altered as follows: 1. two 12-pound seats located at +68.5 were removed; 2. structural modifications weighing +28 pounds were made at +73; 3. a seat and safety belt weighing 30 pounds were installed at +70.5; and 4. radio equipment weighing 25 pounds was installed at +85.

a. +23.51 STA

b. +31.35 STA

c. +30.30 STA

d. +32.52 STA

33.68

An aircraft with an empty weight of 2,100 pounds and an empty weight CG +32.5 was altered as follows: 1. two 18-pound passenger seats located at +73 were removed; 2. structural modifications were made at +77 increasing weight by 17 pounds; 3. a seat and safety belt weighing 25 pounds were installed at +74.5; and 4. radio equipment weighing 35 pounds was installed at +95. What is the new empty weight CG?

a. 34.01

b. 32.04

c. 33.68

d. 34.65

a. S

The classification for high tensile strength fiberglass used in aircraft structures is

a. S

b. E

c. G

d. F

c. Annealing

It is a process that softens a metal and decreases internal stress

a. Quenching

b. Naturalizing

c. Annealing

d. Melting

c. Zone 500

In aircraft zoning system, what is the major zone for Left Wing?

a. Zone 200

b. Zone 700

c. Zone 500

d. Zone 600

a. 5056 aluminum

Which rivet is used for riveting magnesium alloy structures?

a. 5056 aluminum

b. Mild Steel

c. Monel

d. Inconel

a. Strain hardened and stabilized

In temper designation 'H3' is

a. Strain hardened and stabilized

b. Strain hardened and partially annealed

c. Annealed and recrystallized

d. Strain hardened and artificial aged

c. Class 3 fit for the threads

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

d. Class 4 fit for the threads

Brazier

An MS20 455 AD 4-8 rivet is given. What does 455 mean?

Flat head

Brazier

Round Head

Countersunk

Compression molding

A manufacturing process that uses a male and female mold to form the part. It is normally used to manufacture a large number of precision formed parts

Filament winding

Compression molding

Vacuum bagging

Wet lay up

Mallet

A tool made of rubber, wood, or cowhide which is used to hammer aluminum to shape

Hammer

Awl

Mallet

Impact Driver

Nitriding

A heat treating process that diffuses nitrogen (such as in the form of ammonia gas) into the surface of a metal to create a case-hardened surface

Nitriding

Anodizing

Carburizing

Induction Hardening

3.750 inches

The length of flat A is

3.750 inches

3.875 inches

3.937 inches

3.275 inches

57.16 pounds

An aircraft as loaded weighs 4,954 pounds at a CG of +30.5 inches. The CG range is +32.0 inches to +42.1 inches. The ballast arm is +162 inches. Find the minimum weight of the ballast necessary to bring the CG within the CG range.

61.98 pounds

30.58 pounds

57.16 pounds

62.73 pounds

By the manufacturer and do not require heat treatment before being driven

Alloy 2117 rivets are heat treated

Alloy 2117 rivets are not heat treated by the manufacturer

By the manufacturer and do not require heat treatment before being driven

By the manufacturer but require reheat treatment before being driven

To a temperature of 910 to 930 celsius and quenched in cold wate

normalizing

A process that is used to relieved stresses on ferrous metals.

carbonizing

alodining

alodizing

normalizing

0.3436 inch

The amount of material required to make the 90 bend is

0.3436 inch

0.3717 inch

0.3925 inch

0.3625 inch

Lightens and stiffens the structure

A lightening hole in a rib

Prevents lightning strikes damaging the fuselage

Provides a means of passing cable and controls through a pressure bulkhead

Collects and disposes of electrical charges

Lightens and stiffens the structure

165°

A piece of flat stock that is to be bent to a closed angle of 15° must be bent through an angle of

65°

105°

90°

165°

Is supported at one end only with no external bracing

A cantilever wing:

Is externally braced with either struts and/or bracing wires

Is supported at one end only with no external bracing

Has both an upper and lower airfoil section

Folds in the root section to ease storage in confined spaces

Precipitation heat treatment

Also known as artificial aging.

Solution heat treatment

Precipitation heat treatment

Quenching

Tempering

if necessary to reach a place at which the inspection can be accomplished, but not to exceed 10 flight hours.

An aircraft that is required by Section 91.409, to have a 100-hour inspection may be flown beyond the inspection requirement

if necessary to reach a place at which the inspection can be accomplished, but a special flight permit is necessary.

if necessary to reach a place at which the inspection can be accomplished, but not to exceed 10 flight hours without special permit

if necessary to reach a place at which the inspection can be accomplished, but not to exceed 15 flight hours.

if necessary to reach a place at which the inspection can be accomplished, but not to exceed 10 flight hours.

Is a structure formed between the wing spars, skin and ribs to resist bending and twisting loads

A torsion box:

Is a structure within the fuselage to withstand compression, bending, and twisting loads

Is a structure formed between the wing spars, skin and ribs to resist bending and twisting loads

Is a structure within the wing for housing the fuel tanks, flight controls and landing gear

Is a structure designed to reduce weight

Thermoplastic

A category of plastic material that is capable of softening or flowing when reheated is described as a

Thermoset

Thermoplastic

Thermocure

Thermostat

Interference Fit

A kind of fit, where, in this assembly there is no space between the parts. The shaft is always larger than the part it fits into. This means that force is required to assemble the parts

Interference Fit

Clearance Fit

Transition Fit

None of the above

Elasticity

Capability of an object or material to be stretched and to recovers its size and shape after its deformation

Plasticity

Elasticity

Toughness

Brittleness

Copper

In the four-digit aluminum index system number 2024, its major alloying element is

Aluminum

Magnesium

Copper

Silicon

To relieve its internal stresses and reduce its brittleness.

Why is steel tempered after being hardened?

To increase its hardness and ductility.

To increase its strength and decrease its internal stresses.

To relieve its internal stresses and increase its brittleness.

To relieve its internal stresses and reduce its brittleness.

Alodizing

A non-electrolytic chemical treatment for aluminum alloys to increase corrosion resistance and paintbonding qualities is called

Anodizing

Dichromating

Alodizing

Austenitizing

Wrought objects

These objects are formed by physically working the metal into shape

Cast objects

Wrought objects

Hard objects

Real objects

Military Standard

An MS20 455 AD 4-8 rivet is given. What does MS20 mean?

Metric System measurements is used

Malleable Steel rivet

Military Science

Military Standard

Burnishing

A cold working process in which the surface layer of a work piece is plastically deformed by a hard tool: either roller or sliding ball.

Burnishing

Anodizing

Shot peening

Chrome plating

Concentrated Stress

An area covered by a doubler has

Higher Stress

Concentrated Stress

Uniformly Distributed Stress

No Stress Applied

Countersunk rivets

A type of rivets that were developed for used on streamline airfoils and permit a smooth flow over an aircraft's wings or control surfaces.

Brazier rivets

Round rivets

Universal rivets

Countersunk rivets

60:40

Which fiber to resin (percent) ratio for advanced composite wet lay-ups is generally considered the best for strength?

60:40

40:60

30:70

70:30

Magnesium alloy in direct contact with stainless steel

According to general FAA standards, which combination of metals creates the highest risk for severe galvanic action if uninsulated?

Pure aluminum and 2024 aluminum alloy

Magnesium alloy in direct contact with stainless steel

Cadmium-plated steel in contact with low-alloy steel

Titanium in contact with stainless steel

Nickel

Adds strength and hardness to steel and increases its yield strength.

Pure aluminum

Nickel

Silicon

Copper

To retard age hardening.

What is the purpose of refrigerating 2017 and 2024 aluminum alloy rivets after heat treatment?

To retard age hardening.

To relieve internal stresses.

To accelerate age hardening.

None of the above

1:15

According to FAA standards, a grain slope of ___ is the maximum allowable slope allowed in aviation-grade wood.

1:10

1:20

1:15

1:5

Nut

A female fastener with internal threads

Bolt

Nut

Washer

Grommet

2017

A type of rivet that is characterized by a raised dot

2017

2024

5056

3003

if a special permit has been issued for the aircraft.

An aircraft that is due an annual inspection may be flown

if a special permit has been issued for the aircraft.

for the purpose of performing maintenance.

for a period of time not to exceed 10 hours.

by the holder of an inspection authorization.

ATA 52

In ATA System, Door belongs to

ATA 32

ATA 52

ATA 53

ATA 33

2 and 1/4 in

A bolt with the code AN5-22 is typically how long?

22/16 in

22/32 in

2 in

2 and 1/4 in

1.62 inches aft of the original empty weight CG

An aircraft had an empty weight of 2,886 pounds with a moment of 101,673.78 before several alterations were made. The alterations included: (1) Removing two passenger seats (15 pounds each) at +71; (2) Installing a cabinet (97 pounds) at +71; (3) Installing a seat and safety belt (20 pounds) at +71; and (4) Installing radio equipment (30 pounds) at +94. The alterations caused the new empty weight CG to move

1.62 inches aft of the original empty weight CG

2.03 inches forward of the original empty weight CG

2.03 inches aft of the original empty weight CG

1.62 inches forward of the original empty weight CG