Question 1

When annealing is performed to allow for further cold working of the part, it is called which one of the following:

Accepted Answer

A) full anneal 
B) normalizing 
C) process anneal 
D) recovery anneal 
A) full anneal 
B) normalizing 
C) process anneal 
D) recovery anneal C

Question 2

Martensite can best be defined as which one of the following:

Accepted Answer

A) a mixture of ferrite and carbide phases obtained by rapid cooling of austenite 
B) a mixture of ferrite and carbide phases obtained by slow cooling of austenite 
C) a phase consisting of an iron-carbon solution whose composition is the same as the austenite from which it was derived 
D) a solution of cementite in ferrite obtained by rapid cooling of austenite 
A) a mixture of ferrite and carbide phases obtained by rapid cooling of austenite 
B) a mixture of ferrite and carbide phases obtained by slow cooling of austenite 
C) a phase consisting of an iron-carbon solution whose composition is the same as the austenite from which it was derived 
D) a solution of cementite in ferrite obtained by rapid cooling of austenite C

Question 3

Which one of the following surface-hardening treatments is the most common:

Accepted Answer

A) boronizing 
B) carbonitriding 
C) carburizing 
D) chromizing 
E) nitriding 
A) boronizing 
B) carbonitriding 
C) carburizing 
D) chromizing 
E) nitriding C

Question 4

The treatment in which the brittleness of martensite is reduced is called which one of the following:

Accepted Answer

A) aging 
B) annealing 
C) austenitizing 
D) normalizing 
E) quenching
F)tempering 
A) aging 
B) annealing 
C) austenitizing 
D) normalizing 
E) quenching
F)tempering

Question 5

Which of the following are typical reasons to anneal a metal (three correct answers):

Accepted Answer

A) to heat the metal for hot working 
B) to increase strength and hardness 
C) to recrystallize strain-hardened metals 
D) to reduce brittleness 
E) to reduce ductility
F)to relieve stresses 
A) to heat the metal for hot working 
B) to increase strength and hardness 
C) to recrystallize strain-hardened metals 
D) to reduce brittleness 
E) to reduce ductility
F)to relieve stresses

Question 6

Tempering is a heat treatment applied to hardened steels that is best defined as which of the following (one correct answer):

Accepted Answer

A) heating and soaking at a temperature above the austenitizing level followed by rapid cooling 
B) heating and soaking at a temperature above the austenitizing level followed by slow cooling 
C) heating and soaking at a temperature below the austenitizing level followed by rapid cooling 
D) heating and soaking at a temperature below the austenitizing level followed by slow cooling 
A) heating and soaking at a temperature above the austenitizing level followed by rapid cooling 
B) heating and soaking at a temperature above the austenitizing level followed by slow cooling 
C) heating and soaking at a temperature below the austenitizing level followed by rapid cooling 
D) heating and soaking at a temperature below the austenitizing level followed by slow cooling

Question 7

In precipitation hardening, the hardening and strengthening of the metal occurs in which one of the following steps:

Accepted Answer

A) aging 
B) quenching 
C) solution treatment 
A) aging 
B) quenching 
C) solution treatment

Question 8

The most common method for measuring hardenability is which one of the following:

Accepted Answer

A) Brinell hardness test 
B) Jominy end-quench test 
C) Rockwell hardness test 
D) tensile test 
A) Brinell hardness test 
B) Jominy end-quench test 
C) Rockwell hardness test 
D) tensile test

Question 9

Annealing consists of heating a metal to a suitable temperature, holding at that temperature for a certain time, and then slowly cooling:

Accepted Answer

A) True 
 B)False

Question 10

Which of the following are the usual objectives of heat treatment (three best answers):

Accepted Answer

A) increase hardness 
B) increase melting temperature 
C) increase recrystallization temperature 
D) reduce brittleness 
E) reduce density
F)relieve stresses 
A) increase hardness 
B) increase melting temperature 
C) increase recrystallization temperature 
D) reduce brittleness 
E) reduce density
F)relieve stresses

Question 11

The hardness of steel increases with increasing carbon content, but the increase is achieved only through heat treatment:

Accepted Answer

A) True 
 B)False

Question 12

Hardenability refers to the relative capacity of a steel to be hardened by transformation to martensite:

Accepted Answer

A) True 
 B)False

Question 13

Of the following quenching media, which one produces the most rapid cooling rate:

Accepted Answer

A) air 
B) brine 
C) oil 
D) pure water 
A) air 
B) brine 
C) oil 
D) pure water

Question 14

The time-temperature-transformation curve (TTT curve) for steel can best be described by which one of the following:

Accepted Answer

A) indicates how annealing is used to achieve a given desired microstructure 
B) indicates how cooling rate affects the transformation of austenite into various possible phases 
C) indicates how martensite is gradually transformed into tempered martensite as a function of time 
D) indicates how various phases are obtained during heating as a function of time and temperature 
A) indicates how annealing is used to achieve a given desired microstructure 
B) indicates how cooling rate affects the transformation of austenite into various possible phases 
C) indicates how martensite is gradually transformed into tempered martensite as a function of time 
D) indicates how various phases are obtained during heating as a function of time and temperature

Exam 23: Heat Treatment of Metals

When annealing is performed to allow for further cold working of the part, it is called which one of the following:

Martensite can best be defined as which one of the following:

Which one of the following surface-hardening treatments is the most common:

The treatment in which the brittleness of martensite is reduced is called which one of the following:

Which of the following are typical reasons to anneal a metal (three correct answers):

Tempering is a heat treatment applied to hardened steels that is best defined as which of the following (one correct answer):

In precipitation hardening, the hardening and strengthening of the metal occurs in which one of the following steps:

The most common method for measuring hardenability is which one of the following:

Annealing consists of heating a metal to a suitable temperature, holding at that temperature for a certain time, and then slowly cooling:

Which of the following are the usual objectives of heat treatment (three best answers):

The hardness of steel increases with increasing carbon content, but the increase is achieved only through heat treatment:

Hardenability refers to the relative capacity of a steel to be hardened by transformation to martensite:

Of the following quenching media, which one produces the most rapid cooling rate:

The time-temperature-transformation curve (TTT curve) for steel can best be described by which one of the following:

Introduction and Overview of Manufacturing

The Nature of Materials

Mechanical Properties of Materials

Physical Properties of Materials

Engineering Materials

Dimensions, Surfaces, and Their Measurement

Fundamentals of Metal Casting

Metal Casting Processes

Glassworking

Shaping Processes for Plastics

Processing of Polymer Matrix Composites and Rubber

Powder Metallurgy

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Fundamentals of Metal Forming

Bulk Deformation Processes in Metal Workiing

Sheet Metalworking

Theory of Metal Machining

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Cutting Tool Technology

Economic and Product Design Considerations

Grinding and Other Abrasive Processes

Nontraditional Machining and Thermal Cutting

Surface Processing Operations

Fundamentals of Welding

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Brazing, Soldering, and Adhesive Bonding

Mechanical Assembly

Rapid Prototyping and Additive Manufacturing

Processing of Integrated Circuits

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