METL-301 Metallurgy and
Material Specification CWB
Welding Inspector Level 1
(solved & updated)
The ability of a material to deform or stretch without fracture is known as
Ductility (book 2 pg 179)
Cast irons are always made from iron & carbon LESS than 2%?
False (Book 2 pg 251)
When making steel, the first process is to convert iron ore into pig iron. Which furnace is
used in this process?
Blast Furnace (book 2 pg 186)
In CSA standard G40.21, what does the AT designation mean?
Atmospheric corrosion resistant weldable notch-tough steel (book 2 pg 240)
What series of stainless steel is commonly used in washing machines, cutlery, automotive &
food & beverage industry?
200 series (book 2 pg 213)
What is the lightest commercial metal w/ a density of 1800kg/m3?
Magnesium (book 2 pg 253)
What heat treatment process is used to convert white cast iron into malleable cast iron?
Annealing (book 2 pg 188)
How many types of steel are covered by CSA G40.21?
7 (book 2 pg 240)
What designates that AISI 4340 refers to nickel-chromium-molybdenum steel?
The first 2 digits (book 2 pg 245)
The UNS is widely accepted in North America. It was developed & managed jointly between
ATSM & SAE (book 2 pg 241)
The passive oxide layer in stainless steels provide a surface layer inert to corrosive attack.
This is possibly due to
, The chromium content (book 2 pg 211)
Prior to welding on stainless steel, the underside of the joint should be fluxed or purged
(back purged) to prevent oxidation contamination
True (book 2 pg 215)
Tensile strength is the ability of a material to resist growth of a crack
False (book 2 pg 177)
The recrystallization temp for steels is typically
400-700 degrees Celsius
What is the result of hot-shortness in a metal?
Loss of ductility (book 2 pg 234/209)
What is the difference between annealing & normalizing?
Normalizing involves heating into fully austenitic region followed by AIR COOLING. Annealing
is a treatment which involves heating into fully austenitic region followed by FURNACE
COOLING. (book 2 pg 235)
A typical temperature for thermal stress relief treatment of welded fabrication is in the
region of
625 degrees Celsius (book 2 pg 237)
For normalizing, the steel is heated slightly higher than annealing, followed by air cooling.
This type of cooling process produces a grain structure of
Fine ferrite/pearlite (book 2 pg 236)
Stainless steels acquire their special stainless properties from the presence of chromium.
What %age of chromium is required?
More than 10% (book 2 pg 211)
The Charpy V-notch test is commonly used to measure the _______________ of welded
specimens.
Impact strength and toughness (book 2 pg 178)
Steels have a higher compressive strength than rubber
True (book 2 pg 178)
Elongation is the measure of ductility related to the measurement of tensile strength
True (book 2 pg 177)
Yield Strength is
when a material begins to deform from elastic to plastic
The definition of elasticity is
The ability of a material to return to its original shape and dimension after it has been
stretched (book 2 pg 177)
Material Specification CWB
Welding Inspector Level 1
(solved & updated)
The ability of a material to deform or stretch without fracture is known as
Ductility (book 2 pg 179)
Cast irons are always made from iron & carbon LESS than 2%?
False (Book 2 pg 251)
When making steel, the first process is to convert iron ore into pig iron. Which furnace is
used in this process?
Blast Furnace (book 2 pg 186)
In CSA standard G40.21, what does the AT designation mean?
Atmospheric corrosion resistant weldable notch-tough steel (book 2 pg 240)
What series of stainless steel is commonly used in washing machines, cutlery, automotive &
food & beverage industry?
200 series (book 2 pg 213)
What is the lightest commercial metal w/ a density of 1800kg/m3?
Magnesium (book 2 pg 253)
What heat treatment process is used to convert white cast iron into malleable cast iron?
Annealing (book 2 pg 188)
How many types of steel are covered by CSA G40.21?
7 (book 2 pg 240)
What designates that AISI 4340 refers to nickel-chromium-molybdenum steel?
The first 2 digits (book 2 pg 245)
The UNS is widely accepted in North America. It was developed & managed jointly between
ATSM & SAE (book 2 pg 241)
The passive oxide layer in stainless steels provide a surface layer inert to corrosive attack.
This is possibly due to
, The chromium content (book 2 pg 211)
Prior to welding on stainless steel, the underside of the joint should be fluxed or purged
(back purged) to prevent oxidation contamination
True (book 2 pg 215)
Tensile strength is the ability of a material to resist growth of a crack
False (book 2 pg 177)
The recrystallization temp for steels is typically
400-700 degrees Celsius
What is the result of hot-shortness in a metal?
Loss of ductility (book 2 pg 234/209)
What is the difference between annealing & normalizing?
Normalizing involves heating into fully austenitic region followed by AIR COOLING. Annealing
is a treatment which involves heating into fully austenitic region followed by FURNACE
COOLING. (book 2 pg 235)
A typical temperature for thermal stress relief treatment of welded fabrication is in the
region of
625 degrees Celsius (book 2 pg 237)
For normalizing, the steel is heated slightly higher than annealing, followed by air cooling.
This type of cooling process produces a grain structure of
Fine ferrite/pearlite (book 2 pg 236)
Stainless steels acquire their special stainless properties from the presence of chromium.
What %age of chromium is required?
More than 10% (book 2 pg 211)
The Charpy V-notch test is commonly used to measure the _______________ of welded
specimens.
Impact strength and toughness (book 2 pg 178)
Steels have a higher compressive strength than rubber
True (book 2 pg 178)
Elongation is the measure of ductility related to the measurement of tensile strength
True (book 2 pg 177)
Yield Strength is
when a material begins to deform from elastic to plastic
The definition of elasticity is
The ability of a material to return to its original shape and dimension after it has been
stretched (book 2 pg 177)
