AVMT 1021 Chapter 7 study guide

Aircract metals must be ____ so that they can be formed and shaped without detrimental effect.

Malleable

Chrome-molybdenum steel, commonly used in aircraft construction, is an alloy of?

Carbon, Molybdenum, Chromium

Aluminum is used widely in aircraft construction because it ____.

is light, strong, and easily formed.

(True/False) The metal Titanium, when moistened and drawn across glass, will produce a pencil like line.

True

Normalizing is a term used to describe?

Relief of stress in copper based alloys through the use of extreme cold.

(True/False) Heat treating is the process of using heating and cooling methods to obtain specific, and desirable, characteristics in metals

True

Typical terms used to describe heating and cooling methods include?

Heating, Cooling, Soaking, Quenching

Case hardening may be in the form of ____.

carburizing, cyaniding, or nitriding

Alclad aluminum is primarily ____.

aluminum that has pure aluminum on each side of an alloy core

(True/False) An 1100 aluminum alloy rivet is a soft rivet not suitable for high strength application.

True

A Rockwell Hardness Tester measure resistance to penetration of metals and is useful for determining?

Heat treatment condition and Pre-heat treatment

(True/False) Casting, forging, and extruding are methods of heat treatment and determine the final hardness characteristics of metals?

False

Composite aircraft construction material is commonly ____.

a fiber material with a supporting resin

(True/False) Composite aircraft construction may involve toxic or hazardous materials as compared to metals.

True

Common aircraft structural fibers include ____.

aramid, fiberglass, and graphite

The minimum safety equipment when grinding or cutting composite materials, to protect the technician’s lung’s would include ____.

a respirator with particle protection

(True/False) Barrier creams to protect the skin are acceptable for use when working with composites.

True

Honeycomb composite construction for aircraft would include?

a core, face sheets, and adhesive

The term for rubber may include?

Natural rubber, and synthetic rubber such as Buna-s

A class three bolt thread is?

a medium fit

(True/False) A AN 73 bolt has the head drilled for insertion of safety wire.

True

Aircraft bolts have identification information on the ____ of the bolt?

head

Aircraft nuts are made of?

Cadmium plated carbon steel

Self-locking nuts may be used on aircraft if ____.

the bolt or nut are not subject to rotation

(True/False) Sheet spring nuts are used in structural applications if approved by the manufacturer.

False

A helicoil insert is used ____.

to replace damaged threads in aircraft structures

The three parts of a Camloc aircraft fastener include?

Stud, grommet, receptacle

One of the most common aircraft cables is a 7×19. what do these numbers mean?

The cable is made up of 7 strands of wire with 19 wires in each

Safety wire is commonly used on aircraft to secure fasteners. It must be installed in what way?

So that the movement of the fastener tends to tighten the wire

(True/False) Self plugging, friction lock, rivets are typically used when access to both sides of an aircraft surface is difficult or impossible.

True

The series designation 45XX is used for which alloyed steel?

Molybdenum .52%

1100 aluminum contains which specific alloy materials?

none

What natural characteristic of metals is dangerous to aircraft due to the thin material thicknesses involved?

corrosion

The color orange indicates a metal temperature approximately how many degrees Fahrenheit?

1725 degrees F

The normalizing temperature for common 4130 aircraft steel is ____ degrees F.

1600-1700 degree F

Alloy 6061 T4 aluminum is quenched in what medium for solution heat treatment purposes?

water

A triangle placed on the head of an aircraft bolt indicates what specific characteristic.

Close tolerance

A “wing” nut is designated with which AN number?

AN-350

A 5056T rivet would be indicated by what head markings?

Raised Cross

An aircraft landing gear would require what metallic property in order to avoid deformation?

Strength

(True/False) An aircraft bracket, having iron as its primary element, would be described as nonferrous.

False

(not sure of this) Aircraft aluminum skin is easily worked due to these two characteristics?

Malleable and ductile

(True/False) The corrosion resistance of titanium landing gear parts would be as good, or better, than stainless steel.

True

The cast housing of a turbine engine gearbox must be quenched during the heat treatment process. Which of the following solutions has the slowest cooling potential?

Oil

A modern unmanned aircraft is constructed entirely of composites. This indicates that the structure is?

Non-metallic and utilizing fibers in a resin matrix

The tensile strength of composite aircraft structures may be ____ that of steel or aluminum.

4-6 times

The landing gear axle nut of a light aircraft is subject to rotation and severe vibration. What could be employed to safety the nut?

Self-locking nut

No safety required

Safety wire and castle nut

Elongated bolt holes in aircraft structural member may be drilled to the next larger size.

with the manufacturer’s approval

A damaged aluminum wing skin is repaired with copper rivets. This repair is done without consulting the manufacturer of the aircraft. What is one problem this may cause?

Dissimilar metal corrosion

Hardening of 51335 steel is accomplished at ____.

1775-1850 degrees F