Materials And Processes

18 Questions | By Dr3wee | Updated: Jan 29, 2013 | Attempts: 1000

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1.

Which of the following descirbe the effects of annealing steel and aluminum alloys?
- A.
  
  Decrease in internal stress.
- B.
  
  Softening of the metal.
- C.
  
  1 and 2.
- D.
  
  Tempering.
Correct Answer
C. 1 and 2.
2.

Which heat-treating process of metal produces a hard wear-resistant surface over a strong, tough core?
- A.
  
  Case hardening.
- B.
  
  Annealing.
- C.
  
  Tempering
Correct Answer
A. Case hardening.
3.

Which heat-treating operation would be performed when the surface of the metal is changed chemically by introducing a high carbide or nitride content?
- A.
  
  Tempering
- B.
  
  Normalizing
- C.
  
  Case hardening
Correct Answer
C. Case hardening
4.

Normalizing is a process of heat treating
- A.
  
  Aluminum alloys only
- B.
  
  Iron base metals only
- C.
  
  Both aluminum alloys and iron-base metals
Correct Answer
B. Iron base metals only
5.

Which of the following occurs when a mechanical force is repeatedly applied to most metals at room temperature, such as rolling, hammering, or bending?
- A.
  
  The metals become artificially aged.
- B.
  
  The metals become stress corrosion cracked.
- C.
  
  The metals become cold worked, strain or work hardened.
Correct Answer(s)
A. The metals become artificially aged.
C. The metals become cold worked, strain or work hardened.
6.

The reheating of a heat treated metal, such as with a welding torch
- A.
  
  Has little or no effect on a metal's heat treated characteristics.
- B.
  
  Can significantly alter a metal's properties in the reheated area.
- C.
  
  Has a cumulative enhancement effect on the original heat treatment.
Correct Answer
B. Can significantly alter a metal's properties in the reheated area.
7.

Why is steel tempered after being hardened?
- A.
  
  To increase its hardness and ductility.
- B.
  
  To increase its strength and decrease its internal stresses.
- C.
  
  To relieve its internal stresses and reduce its brittleness.
Correct Answer
C. To relieve its internal stresses and reduce its brittleness.
8.

What aluminum alloy designations indicate that the metal has recieved no hardening or tempering treatment?
- A.
  
  3003-F
- B.
  
  5052-H36
- C.
  
  6061-O
Correct Answer
A. 3003-F
9.

Which material cannot be heat treated repeatedly without harmful effects?
- A.
  
  Unclad aluminum alloy in sheet form.
- B.
  
  6061-T9 stainless steel.
- C.
  
  Clad aluminum alloy.
Correct Answer
C. Clad aluminum alloy.
10.

What is descriptive of the annealing process of steel during and after it has been annealed?
- A.
  
  Rapid cooling; high strength
- B.
  
  Slow cooling; low strength
- C.
  
  Slow cooling; increased resistance to wear.
Correct Answer
B. Slow cooling; low strength
11.

What is generally used in the construction of aircraft engine firewalls?
- A.
  
  Stainless Steel.
- B.
  
  Chrome-molybdenum alloy steel.
- C.
  
  Titanium Nickel alloy.
Correct Answer
A. Stainless Steel.
12.

Alclad is a metal consisting of
- A.
  
  Aluminum alloy surface layers and a pure aluminum core.
- B.
  
  Pure aluminum surface layers on an aluminum alloy core.
- C.
  
  A homogeneous mixture of pure aluminum and aluminum alloy.
Correct Answer
B. Pure aluminum surface layers on an aluminum alloy core.
13.

The SAE and the American Iron and Steel Institute use a numerical index system to identify the compostion of various steels. In the number "4130", designating Chromium Molybdenum steel, the first digit indicates the
- A.
  
  Percentage of the basic element in the alloy.
- B.
  
  Percentage of carbon in the alloy in hundredths of a percent.
- C.
  
  Basic alloying element
Correct Answer
C. Basic alloying element
14.

The core material of Alclad 2024-T4 is
- A.
  
  Heat-treated aluminum alloy, and the surface material is commercially pure aluminum.
- B.
  
  Commercially pure aluminum, and the surface material is heat-treated aluminum alloy.
- C.
  
  Strain-hardened aluminum alloy, and the surface material is commercially pure aluminum.
Correct Answer
A. Heat-treated aluminum alloy, and the surface material is commercially pure aluminum.
15.

The aluminum code number 1100 identifies what type of aluminum?
- A.
  
  Aluminum alloy containing 11 perfect copper.
- B.
  
  Aluminum alloy containing zinc.
- C.
  
  99 percent commercially pure aluminum.
Correct Answer
C. 99 percent commercially pure aluminum.
16.

In the four-digit aluminum index system number 2024, the first digit indicates
- A.
  
  The major alloying element.
- B.
  
  The number of different major alloying elements used in the metal.
- C.
  
  The percent of alloying metal added.
Correct Answer
A. The major alloying element.
17.

Why is it considered good practice to normalize a part after welding?
- A.
  
  To relieve internal stresses developed within the base metal.
- B.
  
  To increase the hardness of the weld.
- C.
  
  To remve the surface scale formed during welding.
Correct Answer
A. To relieve internal stresses developed within the base metal.
18.

Parts are rinsed thoroughly in hot water after they have been heat treated in a sodium and potassium nitrite bath to
- A.
  
  Prevent corrosion.
- B.
  
  Prevent surface cracking.
- C.
  
  Retard discoloration.
Correct Answer
A. Prevent corrosion.

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Current Version
Jan 29, 2013

Quiz Edited by
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Oct 03, 2011

Quiz Created by
Dr3wee

Materials And Processes

Which of the following descirbe the effects of annealing steel and aluminum alloys?

Which heat-treating process of metal produces a hard wear-resistant surface over a strong, tough core?

Which heat-treating operation would be performed when the surface of the metal is changed chemically by introducing a high carbide or nitride content?

Normalizing is a process of heat treating

Which of the following occurs when a mechanical force is repeatedly applied to most metals at room temperature, such as rolling, hammering, or bending?

The reheating of a heat treated metal, such as with a welding torch

Why is steel tempered after being hardened?

What aluminum alloy designations indicate that the metal has recieved no hardening or tempering treatment?

Which material cannot be heat treated repeatedly without harmful effects?

What is descriptive of the annealing process of steel during and after it has been annealed?

What is generally used in the construction of aircraft engine firewalls?

Alclad is a metal consisting of

The SAE and the American Iron and Steel Institute use a numerical index system to identify the compostion of various steels. In the number "4130", designating Chromium Molybdenum steel, the first digit indicates the

The core material of Alclad 2024-T4 is

The aluminum code number 1100 identifies what type of aluminum?

In the four-digit aluminum index system number 2024, the first digit indicates

Why is it considered good practice to normalize a part after welding?

Parts are rinsed thoroughly in hot water after they have been heat treated in a sodium and potassium nitrite bath to