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WorksheetsReport 1
Total questions: 78
Worksheet time: 43mins
Which of the following is TRUE about dry corrosion?
Also known as direct oxidation corrosion.
Also known as electrochemical corrosion.
Causes metal to damage slowly but effectively.
Involves the position of metal in the electrochemical series.
Listed below are non- ferrous metals EXCEPT
aluminium
zinc
hydrogen
copper
Which of the following statement below is an example of corrosion remedial action in designs?
Bolts and rivets should be replaced by proper welding.
Use of corrosion resistant alloy.
Plastic and oil are use mainly for coatings.
Chromium is added to the steel to enhance its corrosion resistant properties.
Materials that are manufactured and used in small-scale settings.
Composites
Polymers
Biomedical materials
Nanomaterials
What is an alloy
A mixture of metals and gas
A mixture of carbon and steel
A homogenus mixture of metals and non metals
mixture of metals and non metals
Which of the following factors primarily determines the properties of a metal alloy?
Atomic number of the constituent metals
Relative amounts of each metal in the alloy
Temperature at which the alloy is formed
Thickness of the alloy coating
Why are metal alloys often preferred over pure metals for industrial applications?
They are cheaper to produce
They have superior mechanical properties
They are easier to recycle
They have a higher melting point
Which type of metal alloy undergoes a phase transformation known as martensitic transformation upon cooling from a high temperature?
Austenitic stainless steel
Brass alloy
Aluminum alloy
Carbon steel alloy
How do alloying elements such as chromium and nickel impact the fabrication of stainless steel alloys?
By forming a protective oxide layer on the surface, enhancing corrosion resistance during fabrication and in service
By increasing the hardness of the alloy, facilitating machining processes
By enhancing the thermal conductivity of the alloy, improving heat dissipation during fabrication
By promoting the formation of intermetallic phases, complicating the fabrication process
What are the characteristics of a metal?
Good electrical conductivity, malleability, ductility, and high thermal conductivity
Poor electrical conductivity, brittleness, and low thermal conductivity
Low melting point, high reactivity, and poor thermal conductivity
High electrical resistance, low density, and high melting point
What is an alloy?
A substance made by mixing two or more metals to create a material with improved properties
A substance made by mixing two or more non-metals to create a material with improved properties
A substance made by mixing a metal and a non-metal to create a material with improved properties
A substance made by mixing two or more elements, at least one of which is a metal, to create a material with improved properties
Which is an example of an alloy used for joining electrical components and wires?
Steel
Brass
Bronze
Solder
What is the classification of metals and alloys based on the arrangement of atoms within their crystal lattice?
Crystalline and non-crystalline structures
Metallic and non-metallic structures
Ionic and covalent structures
Amorphous and crystalline structures
What is the remarkable property of some stainless steel alloys?
High electrical conductivity
Resistance to corrosion and staining
Low melting point
Superior hardness and toughness
Stainless steel is used for
aeroplanes
surgical instruments
sculptures
microwaves
Alloys are much stronger because...
the particles from the different metals help the arrangement to stay in fixed positions
the different metals bond well
the particles from the different metals mix and disrupt the pattern making it hard for them to slide
Which of the following properties does not belong to an alloy as compared to its pure metal?
Stronger
More corrosion resistant
Harder
More malleable
Melting and mixing zinc with copper will give you ?
Bronze
Copper Oxide
Brass
Zinc oxide
This metal can be harmful to human health if ingested or after long term exposure
Steel
Cobalt
Nickel
Lead
Bronze is made by adding copper with what other metal?
Tin
Zinc
Lead
Cobalt
The most widespread metal on earth is...
Steel
Iron
Aluminum
Copper
Which metal is commonly used in the manufacture of musical instruments?
Aluminium
Copper
Brass
Mild Steel
Stainless Steel
Name the furnace to produce the pig iron.
Cupola furnace
Blast furnace
Crucible furnace
Cylindrical furnace
Why the material storage must be near to furnace in pig iron making.
Reduce the manufacturing time.
Reduce the manufacturing costs
Enhance the process
Ease the pig iron making process.
What is Non Ferrous Metal ?
Metal which does not have significant quantity of iron or iron as their base metal
Metal which has iron as their base metal
Metal which rust easily
Which of the following is Non Ferrous Metal ?
1.Aluminum
2.Copper
3.Manganese
4.Nickel chromium steel
1,2,3
1,2,4
1,3,4
What does AAA stands for?
American Aluminum Association
American Aerospace Association
Aerospace Aluminum Association
This sand contains many ingredients, like fine sand particles, finely ground refractories, clay, graphite, and fiber reinforcements and in many cases, the clay content may be of the order of 50% or more.
Natural sand
Synthetic sand
Loam sand
White sand
What are the characteristics of a metal?
Good electrical conductivity, malleability, ductility, and high thermal conductivity
Poor electrical conductivity, brittleness, and low thermal conductivity
Low melting point, high reactivity, and poor thermal conductivity
High electrical resistance, low density, and high melting point
What is an alloy?
A substance made by mixing two or more metals to create a material with improved properties
A substance made by mixing two or more non-metals to create a material with improved properties
A substance made by mixing a metal and a non-metal to create a material with improved properties
A substance made by mixing two or more elements, at least one of which is a metal, to create a material with improved properties
Which is an example of an alloy used for joining electrical components and wires?
Steel
Brass
Bronze
Solder
What is the chemical formula of magnetite?
Fe2O3
FeO
Fe3O4
FeSO4
What is the classification of metals and alloys based on the arrangement of atoms within their crystal lattice?
Crystalline and non-crystalline structures
Metallic and non-metallic structures
Ionic and covalent structures
Amorphous and crystalline structures
What is the remarkable property of some stainless steel alloys?
High electrical conductivity
Resistance to corrosion and staining
Low melting point
Superior hardness and toughness
What type of property refers to the behavior of metals or alloys when subjected to external forces or loads?
Chemical property
Mechanical property
Thermal property
Physical property
What is the main difference between heat treatable and non-heat treatable aluminum alloys?
Heat treatable alloys have higher alloy content than non-heat treatable alloys
Heat treatable alloys are more expensive to fabricate than non-heat treatable alloys
Heat treatable alloys can be easily formed into various shapes, while non-heat treatable alloys are primarily used for sheet and plate
Heat treatable alloys have higher thermal conductivity than non-heat treatable alloys
How are the mechanical properties of heat treatable aluminum alloys affected by welding?
The mechanical properties are improved after welding
The mechanical properties are reduced by 30-50% after welding
The mechanical properties remain unchanged after welding
The mechanical properties vary depending on the heat input during welding
A metal forming process in which a material is passed through a pair of rollers.
casting
forging
extrusion
rolling
In this process, the basic forms are cut and bent into different shapes.
extrusion
drawing
casting
sheet metal forming
Forging is used to produce...
cat food
machine parts
car bodies
wires
Which products are made by extrusion?
(more than one answer)
bricks
rods
chips
cereals
pipes
Casting is done using a ___________
die
hammer
bar
mould
The characteristics of stainless steel are determined by __________
resistance
high stress
cobalt content
chromium content
Commercially pure iron contains up to 0.008% C and steel up to 2% C. What are the carbon content in Cast Iron?
More than 2% C
Up to 4% C
Up to 10% C
Up to 7% C
Which of the following statement below is an example of corrosion remedial action in designs?
Bolts and rivets should be replaced by proper welding.
Use of corrosion resistant alloy.
Plastic and oil are use mainly for coatings.
Chromium is added to the steel to enhance its corrosion resistant properties.
Low alloy steel can be listed as below EXCEPT
Medium carbon steel
High carbon steel
Moderate carbon steel
Low carbon steel
Figure above shows the process of _________
Metal rolling
Metal drawing
Forging
Extrusion
Investment casting also known as Lost wax casting.
TRUE
FALSE
The following image is refer to the _________ casting process.
pressure wax
molten wax
lost wax
pressure die
Which of the following most nearly gives the flange width of W200x41.7?
166 mm
203 mm
204 mm
165 mm
Which of the following most nearly gives the overall depth of HP460x202?
457 mm
445 mm
451 mm
465 mm
aluminum alloy 99% or greater
1xxx
2xxx
3xxx
4xxx
Copper
1xxx
2xxx
3xxx
4xxx
How much percent carbon does SAE 4340 have?
0.43 percent carbon
0.04 percent carbon
0.40 percent carbon
Which of the following alloy designations indicates a wrought aluminum alloy, often used in aerospace applications?
304 Stainless Steel
7075-T6 Aluminum
1018 Carbon Steel
2024 Brass
What does the "T6" signify in the designation "6061-T6" for an aluminum alloy?
Thermal Conductivity
Tempering Process
Tensile Strength
Thermal Expansion Coefficient
In the alloy designation "Ti-6Al-4V", what do the numbers signify?
Titanium content, Aluminum content, Vanadium content
Tensile strength, Yield strength, Elongation
Manufacturing process, Surface finish, Hardness
Thermal conductivity, Electrical resistivity, Density
What is the primary reason for adding molybdenum to stainless steel alloys?
Increased hardness
Improved machinability
Enhanced corrosion resistance
Greater ductility
Which designation typically refers to a high-strength steel alloy used in structural applications?
6061 Aluminum Alloy
4340 Alloy Steel
2011-T3 Aluminum
316L Stainless Steel
What is the significance of the "L" in the designation "304L" for stainless steel?
Low carbon content
High carbon content
Low tensile strength
High tensile strength
In the steel designation "AISI 1075", what does the "75" signify?
Nickel content as a percentage
Silicon content as a percentage
Carbon content as a percentage
Chromium content as a percentage
What is the significance of the "H" in the designation "AISI 4340H"?
High carbon content
High tensile strength
Heat treated
High hardness
Which of the following steel designations indicates a low-alloy steel with molybdenum and chromium, often used in automotive and machinery parts?
AISI 1018
AISI 4140
AISI 304
AISI 1095
Which steel designation is commonly used in applications requiring high wear resistance, such as cutting tools and bearings?
AISI 52100
AISI 1020
AISI 4340
AISI 8620
Which aluminum designation indicates a high-strength alloy commonly used in aerospace applications and characterized by its excellent strength-to-weight ratio?
3003-H14
6061-T6
1100-O
5052-H32
Which of the following aluminum designations is typically used in marine environments due to its excellent corrosion resistance?
2024 Aluminum Alloy
1100 Aluminum Alloy
5052 Aluminum Alloy
6061 Aluminum Alloy
Which aluminum designation is commonly used in electrical transmission lines due to its high electrical conductivity?
2024 Aluminum Alloy
1100 Aluminum Alloy
6061 Aluminum Alloy
7075 Aluminum Alloy
Which aluminum designation indicates a precipitation-hardened alloy with excellent corrosion resistance, often used in aerospace applications?
7075-T6
2024-T3
6061-O
1100-H14
Which of the following non-destructive testing methods is commonly used to detect surface and subsurface defects in steel welds?
Ultrasonic Testing (UT)
Magnetic Particle Testing (MT)
Radiographic Testing (RT)
Liquid Penetrant Testing (PT)
Which of the following welding methods is commonly used for joining thick steel plates in shipbuilding and structural fabrication?
Gas Metal Arc Welding (GMAW)
Shielded Metal Arc Welding (SMAW)
Flux-Cored Arc Welding (FCAW)
Submerged Arc Welding (SAW)
Scenario: You are a project manager overseeing the fabrication of a steel structure for a new building. The fabrication process is underway, and you receive a report from the quality control team indicating that a batch of steel plates has been delivered with surface contamination. This contamination could affect the quality of welds and compromise the integrity of the structure.
What is the most appropriate course of action to address this issue?
Proceed with fabrication as scheduled and trust that the contamination will not significantly impact the final product
Notify the client about the issue and ask for their opinion on how to proceed.
Immediately stop the fabrication process and reject the contaminated steel plates. Contact the supplier to arrange for replacement plates.
Instruct the welding team to work extra carefully to mitigate the effects of the contamination during welding.
Scenario: During the fabrication of a steel structure, a welding inspector identifies a defect in a critical weld joint. The defect is small but could potentially compromise the structural integrity of the entire assembly if left unaddressed.
What would be the most appropriate immediate action to take?
Proceed with the fabrication, noting the defect for future reference, as it may not significantly affect the structure's overall strength.
Notify the welding team about the defect and ask them to repair it at their earliest convenience, without interrupting the fabrication schedule.
Halt the fabrication process immediately and initiate an investigation to determine the root cause of the defect. Concurrently, arrange for a qualified welder to repair the joint following approved procedures.
Ignore the defect and apply additional reinforcement to the surrounding areas to compensate for any potential weakness in the weld joint.
What is the purpose of post-weld heat treatment (PWHT) in steel fabrication?
To increase the hardness of the weld
To relieve residual stresses and prevent cracking
To improve the corrosion resistance of the weld
To enhance the ductility of the weld
