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1
The reheating of a heat treated metal such as with a welding torch
Can significantly alter a metals properties in the reheated area
2
Which heat treating Process of metal produces a hardware resistant surface over a strong, tough core?
case hardening
3
What is generally used in the construction of aircraft, exhaust collectors, stacks, and manifolds?
Stainless steel
4
What metal has special short term heat properties and is used in the construction of aircraft firewall?
titanium alloy
5
Normalizing is a process of heat treating
Iron based metals only
6
What defects will be detected by magnetizing a part using continuous longitudinal magnetization with a cable?
Defects perpendicular to the long axis of the part
7
One way a part may be demagnetized after magnetic particle inspection is by
slowly moving the part out of an AC magnet field of sufficient strength
8
Alclad Is a metal consisting of
pure aluminum surface layers on an aluminum alloy core
9
Why is steel tempered after being hardened?
To reveal its internal stresses, and reduce its brittleness
10
Which type crack can be detected by magnetic particle inspection using either circular or longitudinal Magnetization?
45 degrees
11
What type of corrosion may attack the grain bound-Aries Of aluminum alloys when the heat treatment process has been improperly accomplished?
intergranular
12
An aircraft part may be demagnetized by subjecting it to a magnetizing force from Alternating current that is gradually reduced in strength. an aircraft part may be demagnetized by subjecting it to a magnetizing force from direct current that is alternately Reversed in direction and gradually reduced in strength Regarding the above statement
both one and two are true .
13
Which if the following factors are considered essential knowledge for X-ray exposure?
material thickness and density and the type of defect to be detected
14
Circular magnetization of a part can be used to detect which defects?
Defects, parallel to the long axis of the part
15
Which material cannot be heat treated repeatedly without harmful effects?
clad aluminum alloy
16
What aluminum alloy designations indicate that the metal has received no hardening or tempering treatment?
3003-F
17
The aluminum code number 1100 identifies what type of aluminum?
99% commercially, pure aluminum
18
Which heat treating operation would be performed when the surface of the metal is changed, chemically by introducing a high carbide or nitride Contant?
case hardening
19
What is descriptive of the annealing process of steel during and after it has been annealed
slow cooling, low strength .
20
Liquid penetrant inspection method may be used on which of the following?
ferrous and nonferrous metals and nonporous plastic
21
The core material of Alclad 2024-T4 is
heat treated aluminum alloy, and the surface material is commercially pure aluminum
22
Magnetic particle inspection is used primarily to detect
flaws on or near the surface
23
The pattern for an inclusion is a magnetic particle buildup forming
Parallel lines
24
Which of the following occurs when a mechanical force, such as rolling hammering, or bending, is repeatedly applied to most metals at room temperature
The metals become strain or work hardened, or cold worked
25
Which of the following describe the effects of annealing Steel and aluminum alloys?
Decreasing internal stresses and softening of the metal