Question 1

Which type of cast iron undergoes a transformation as a result of a long heat-treating process to reduce brittleness?

Accepted Answer

A)  Gray 
B)  White 
C)  Malleable 
D)  Nodular 
A)  Gray 
B)  White 
C)  Malleable 
D)  Nodular

Question 2

Chromium and carbon combine to form ____________________.

Accepted Answer

The answer of Chromium and carbon combine to form ____________________....

Question 3

Two of the most important properties of the nonferrous metal ____________________ are its extremely high strength-to-weight ratio (in alloy form) and its generally excellent corrosion resistance.

Accepted Answer

The answer of Two of the most important properties of...

Question 4

Why must some castings be repaired without pre- and postheating?

Accepted Answer

A)  They are large or have to be repaired in place. 
B)  They are made of a type of cast iron that cannot be preheated because it is too soft. 
C)  It would damage the paint job on the part. 
D)  Cast iron repairs always require pre- and postheating. 
A)  They are large or have to be repaired in place. 
B)  They are made of a type of cast iron that cannot be preheated because it is too soft. 
C)  It would damage the paint job on the part. 
D)  Cast iron repairs always require pre- and postheating.

Question 5

Steels alloyed with carbon and a low concentration of silicon and manganese are known as ____________________ steels.

Accepted Answer

The answer of Steels alloyed with carbon and a low...

Question 6

The most widely used stainless steels are the ____________________ types.

Accepted Answer

chromium-n

Question 7

To improve weldability in stainless steel, the carbon content should not be more than ____ %.

Accepted Answer

A)  0.03 
B)  0.30 
C)  3.0 
D)  30.0 
A)  0.03 
B)  0.30 
C)  3.0 
D)  30.0

Question 8

Chromium carbides form when the metal is between ____ Fahrenheit.

Accepted Answer

A)  200 ° and 500º 
B)  500 ° and 800º 
C)  800 ° and 1500 ° 
D)  1500 ° and 2000 ° 
A)  200 ° and 500º 
B)  500 ° and 800º 
C)  800 ° and 1500 ° 
D)  1500 ° and 2000 °

Question 9

____________________ steel is used for wear resistance in applications involving impact, such as power shovels, rock crushers, mine equipment, and augers.

Accepted Answer

The answer of ____________________ steel is used for wear resistance...

Question 10

____________________ steels contain specified larger proportions of alloying elements.

Accepted Answer

The answer of ____________________ steels contain specified larger proportions of...

Question 11

High-carbon steels usually have a carbon content of ____ %.

Accepted Answer

A)  0.30 
B)  0.30 to 0.50 
C)  0.50 to 0.90 
D)  30 to 90 
A)  0.30 
B)  0.30 to 0.50 
C)  0.50 to 0.90 
D)  30 to 90

Question 12

Medium-carbon steel has ____ % carbon content.

Accepted Answer

A)  0.30 
B)  0.30 to 0.50 
C)  30 
D)  30 to 50 
A)  0.30 
B)  0.30 to 0.50 
C)  30 
D)  30 to 50

Question 13

What is the most common preheating temperature range for most steels?

Accepted Answer

A)  250°F to 400°F (120°C to 200°
C)  
B)  50°F to 100°F (10°C to 37°
C)  
C)  350°F to 650°F (170°C to 340°
C)  
D)  65°F to 145°F (18°C to 62°
C)  
A)  250°F to 400°F (120°C to 200°
C)  
B)  50°F to 100°F (10°C to 37°
C)  
C)  350°F to 650°F (170°C to 340°
C)  
D)  65°F to 145°F (18°C to 62°
C)

Question 14

Why must all surface contamination be removed before making a repair weld?

Accepted Answer

A)  Exposure to materials released during welding can harm your health. 
B)  Some chemicals can be completely safe until they are exposed to the welding. 
C)  The smoke or fumes contamination produces can be an irritant to the skin or eyes. 
D)  All of the above 
A)  Exposure to materials released during welding can harm your health. 
B)  Some chemicals can be completely safe until they are exposed to the welding. 
C)  The smoke or fumes contamination produces can be an irritant to the skin or eyes. 
D)  All of the above

Question 15

Explain the meaning of the numbers in the SAE and AISI classification systems.

Accepted Answer

The first two digits together indicate t

Question 16

For steels containing more than ____ % carbon, preheating and subsequent heat treatment generally are required to produce a satisfactory weld.

Accepted Answer

A)  0.30 
B)  0.40 
C)  30 
D)  40 
A)  0.30 
B)  0.40 
C)  30 
D)  40

Question 17

Most welding processes produce a(n) ____ in which the metals are heated over a range of temperatures.

Accepted Answer

A)  thermal cycle 
B)  fusion cycle 
C)  interpass temperature 
D)  phase change 
A)  thermal cycle 
B)  fusion cycle 
C)  interpass temperature 
D)  phase change

Question 18

In both steel classification systems, the first number often, but not always, refers to the ____.

Accepted Answer

A)  most appropriate type of welding 
B)  basic type of steel 
C)  melting point 
D)  carbon content 
A)  most appropriate type of welding 
B)  basic type of steel 
C)  melting point 
D)  carbon content

Question 19

Why must metal that is below 70°F (20°C) be preheated before welding?

Accepted Answer

A)  If the metal is too cold, you cannot get a weld pool established. 
B)  Because the cold metal quenches the weld. 
C)  The arc on cold metal is not stable, and it will wander around the surface making it hard to keep the weld going along the joint. 
D)  The hot metal on the cold plate will not stick, it just bounces off. 
A)  If the metal is too cold, you cannot get a weld pool established. 
B)  Because the cold metal quenches the weld. 
C)  The arc on cold metal is not stable, and it will wander around the surface making it hard to keep the weld going along the joint. 
D)  The hot metal on the cold plate will not stick, it just bounces off.

Question 20

____________________ stainless steels contain almost no nickel and are cheaper than austenitic steels.

Accepted Answer

The answer of ____________________ stainless steels contain almost no nickel...

Exam 27: Weldability of Metals

Which type of cast iron undergoes a transformation as a result of a long heat-treating process to reduce brittleness?

Chromium and carbon combine to form ____________________.

Two of the most important properties of the nonferrous metal ____________________ are its extremely high strength-to-weight ratio (in alloy form) and its generally excellent corrosion resistance.

Why must some castings be repaired without pre- and postheating?

Steels alloyed with carbon and a low concentration of silicon and manganese are known as ____________________ steels.

The most widely used stainless steels are the ____________________ types.

To improve weldability in stainless steel, the carbon content should not be more than ____ %.

Chromium carbides form when the metal is between ____ Fahrenheit.

____________________ steel is used for wear resistance in applications involving impact, such as power shovels, rock crushers, mine equipment, and augers.

____________________ steels contain specified larger proportions of alloying elements.

High-carbon steels usually have a carbon content of ____ %.

Medium-carbon steel has ____ % carbon content.

What is the most common preheating temperature range for most steels?

Why must all surface contamination be removed before making a repair weld?

Explain the meaning of the numbers in the SAE and AISI classification systems.

For steels containing more than ____ % carbon, preheating and subsequent heat treatment generally are required to produce a satisfactory weld.

Most welding processes produce a(n) ____ in which the metals are heated over a range of temperatures.

In both steel classification systems, the first number often, but not always, refers to the ____.

Why must metal that is below 70°F (20°C) be preheated before welding?

____________________ stainless steels contain almost no nickel and are cheaper than austenitic steels.

Introduction to Welding

Safety in Welding

Shielded Metal Arc Equipment, Setup, and Operation

Shielded Metal Arc Welding of Plate

Shielded Metal Arc Welding of Pipe

Shielded Metal Arc Welding Aws Sense Certification

Flame Cutting Equipment, Setup, and Operation

Plasma Arc Cutting Equipment, Setup, and Operation

Related Cutting Processes

Gas Metal Arc Welding Equipment, Setup, and Operation

Gas Metal Arc Welding

Flux Cored Arc Welding Equipment, Setup, and Operation

Flux Cored Arc Welding

Gas Metal Arc and Flux Cored Arc Welding of Pipe

Gas Metal Arc and Flux Cored Arc Welding Aws Sense Certification

Gas Tungsten Arc Welding Equipment, Setup, and Operation

Gas Tungsten Arc Welding of Plate

Gas Tungsten Arc Welding of Pipe

Gas Tungsten Arc Welding Plate and Pipe Aws Sense Certification

Shop Math and Weld Cost

Reading Technical Drawings

Welding Joint Design and Welding Symbols

Fabricating Techniques and Practices

Welding Codes and Standards

Testing and Inspection

Welding Metallurgy

Filler Metal Selection

Welding Automation and Robotics

Other Welding Processes

Oxyfuel Welding Equipment, Setup, and Operation

Oxyacetylene Welding and Brazing, Braze Welding, and Soldering

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