Chapter 2 Metals
Which of these temper designations indicates "strain hardened and partially annealed"?
-H2
Which of these items should you keep in mind when choosing substitute metal for use in aircraft repair?
-Maintaining the original strength of the structure -Maintaining the original weight -Maintaining contour or aerodynamic properties
Quantitative inspection of metals includes:
-Mechanical properties -Dimensional requirement -Chemical composition
Which of these temper designations indicates "solution heat treated and then artificially aged"?
-T6
An aluminum/silicon alloy is denoted by which series number?
4000
If a bolt were installed in a hole that was too large, and the head was pulled through the material when torque was applied, it means that what measure of strength of the material was insufficient?
Bearing strength
Metal that allows for little bending or forming without shattering is called what?
Brittle
This property of metal enables it to return to its natural shape.
Elasticity
The ability of a metal to resist abrasion, penetration, cutting action, or permanent distortion is called what?
Hardness
Nickel steels are primarily used in which aircraft parts?
Hardware, like nuts and bolts
Which of these is not a common method of carburizing steel?
Instant carburizing
When hardening carbon steel, it must be cooled to below 1,000°F within what time limit?
Less than 1 second
To measure the hardness of precision work pieces that are too small to be measured by other tests, you could use:
Microhardness testing
Which of these is a nickel alloy?
Monel
Which of these is not a standard method of quenching heated metal?
Oil-based quenching
Generally speaking, which of these is an advantage of ferrous metals over nonferrous metals?
Only ferrous metals can be normalized
One method of testing the hardness of metals involves measuring the depth of penetration of a diamond cone or a hardened steel ball under pressure into the metal. It is called the:
Rockwell Hardness Testing System
Which of the following is not a metal commonly alloyed with magnesium?
Silver
What type of strength is measured by the resistance of a material to a force that would tend to pull it apart?
Tensile strength
Which hardness testing system looks like a set of pliers with a dial attached?
Webster Hardness Gauge
The point at which a load would cause an initial indication of a permanent distortion is called:
Yield strength
Which of these is not a property of aluminum that makes it advantageous in modern aircraft construction?
Contains steel
If an aluminum alloy sheet has undergone cladding with pure aluminum, and its thickness is 0.050", how thick is the cladding on each side?
0.0025"
Which of these thickness measurements is outside of the normal range for aluminum alloys used in small aircraft construction?
0.166"
Aluminum alloys become liquid at approximately what temperature?
1,250°F