Metal Transformation Quiz Questions
Metal is one of the best heat conductors of all times. Different types of metals and alloys are used to transfer heat as per the requirements. Take up the quiz below and gauge your knowledge of heat and metal transformation.
Questions and Answers
- 1.
In specifications iron-based alloys are often referred to by the generic name...
- A.
Wrought metals
- B.
Ironic alloys
- C.
Ferrous metals
- D.
Carbon alloys
Correct Answer
C. Ferrous metalsExplanation
Ferrous metals are often referred to as iron-based alloys in specifications. The term "ferrous" refers to metals that contain iron as their main component. These metals are known for their strength, durability, and magnetic properties. They are widely used in various industries, including construction, automotive, and manufacturing. Therefore, referring to iron-based alloys as ferrous metals is a common and accurate way to describe them in specifications.Rate this question:
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- 2.
The structural frame of the Eiffel Tower is..
- A.
Wrought iron
- B.
Steel
- C.
Cast iron
- D.
Pig iron
Correct Answer
A. Wrought ironExplanation
The structural frame of the Eiffel Tower is made of wrought iron. Wrought iron is a type of iron that is low in carbon content and has been worked and shaped by hand. It is known for its strength and durability, making it suitable for supporting the weight of the tower. Additionally, wrought iron has a unique aesthetic appeal and was commonly used in the construction of 19th-century buildings and structures.Rate this question:
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- 3.
The Bessemer process was...
- A.
Electric
- B.
Gravitational
- C.
Solar
- D.
Pneumatic
Correct Answer
D. PneumaticExplanation
The correct answer is pneumatic because the Bessemer process was a method of steelmaking that involved blowing air through molten iron to remove impurities. This process relied on the use of compressed air or gas, making it pneumatic in nature.Rate this question:
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- 4.
What is the approximate minimum percent of iron content required in ore if it is to be shipped from the mine to the blast furnace without beneficiation?
- A.
25
- B.
50
- C.
75
- D.
90
Correct Answer
B. 50Explanation
The approximate minimum percent of iron content required in ore if it is to be shipped from the mine to the blast furnace without beneficiation is 50. This means that the ore needs to have at least 50% iron content in order to be directly transported without any additional processing or beneficiation.Rate this question:
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- 5.
The process of sintering is used to...
- A.
Float impurities away from iron
- B.
Fuse iron ore dust into a clinker-like form
- C.
Magnetically separate impurities from iron
- D.
Roll iron particles in to small pellet shapes
Correct Answer
B. Fuse iron ore dust into a clinker-like formExplanation
Sintering is a process that involves heating iron ore dust to a high temperature, but below its melting point, in order to fuse the particles together. This results in the formation of a clinker-like material, which can then be further processed to create iron pellets or other forms for use in various industries. The sintering process helps to improve the quality and properties of the iron ore, making it suitable for further processing and use in manufacturing.Rate this question:
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- 6.
What is the approximate minimum percentage of iron required in ore that is to be charge directly into the steel making furnace, thus bypassing the traditional blast furnance process?
- A.
25
- B.
50
- C.
75
- D.
90
Correct Answer
D. 90Explanation
The approximate minimum percentage of iron required in ore that is to be charged directly into the steel making furnace, bypassing the traditional blast furnace process, is 90%. This high percentage of iron is necessary because the direct charging process skips the initial steps of the blast furnace process, where the ore is converted into pig iron. By directly charging the ore with a high iron content, the steel making furnace can produce steel more efficiently.Rate this question:
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- 7.
The chief fuel used in a blast furnance is..
- A.
Coal
- B.
Natural gas
- C.
Coke
- D.
Electricity
Correct Answer
C. CokeExplanation
The chief fuel used in a blast furnace is coke. Coke is a solid carbonaceous material derived from coal. It is used as a fuel because it has a high carbon content and burns at a high temperature, which is necessary for the smelting process in a blast furnace. Coke also has low impurities, making it ideal for producing iron and steel.Rate this question:
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- 8.
Identify a common flux used in iron making.
- A.
Coal
- B.
Limestone
- C.
Carbon
- D.
Coke
Correct Answer
B. LimestoneExplanation
Limestone is a common flux used in iron making. Fluxes are substances that are added to a furnace or smelting process to aid in the removal of impurities and improve the quality of the final product. In iron making, limestone is added as a flux to help remove impurities such as sulfur and phosphorus from the molten iron, resulting in a purer and higher-quality iron. Additionally, limestone helps to form a slag, which acts as a protective layer on top of the molten iron, preventing oxidation and loss of heat.Rate this question:
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- 9.
Refractories...
- A.
Line the walls of iron and steel making furnaces
- B.
Are added to the blast furnace to float impurities to the surface
- C.
Are an alloying substance for steel
- D.
Serve as fuel when coal is not available
Correct Answer
A. Line the walls of iron and steel making furnacesExplanation
Refractories are materials that are specifically designed to withstand high temperatures and harsh conditions. In the context of iron and steel making furnaces, refractories are used to line the walls of these furnaces. This lining acts as a protective barrier, preventing the intense heat from damaging the structure of the furnace. Additionally, the refractory lining helps to maintain the desired temperature inside the furnace and provides insulation. By lining the walls, refractories ensure the longevity and efficiency of the iron and steel making process.Rate this question:
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- 10.
Select the list which shows a hierarchy of carbon content from highest to lowest.
- A.
Cast iron, wrought iron, steel, pig iron
- B.
Steel, wrought iron, pig iron, cast iron
- C.
Pig iron, cast iron, steel, wrought iron
- D.
Wrought iron, pig iron, cast iron, steel
Correct Answer
C. Pig iron, cast iron, steel, wrought ironExplanation
The correct answer is pig iron, cast iron, steel, wrought iron. This hierarchy is based on the decreasing carbon content in each type of iron. Pig iron has the highest carbon content, followed by cast iron, steel, and wrought iron with the lowest carbon content.Rate this question:
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- 11.
Identify the three modern steel making process.
- A.
Hydraulic, open hearth, electric
- B.
Open hearth, electric, pneumatic
- C.
Electric, pneumatic, closed hearth
- D.
Pneumatic, hydraulic, open hearth
Correct Answer
B. Open hearth, electric, pneumaticExplanation
The three modern steel making processes are open hearth, electric, and pneumatic. Open hearth refers to a method where steel is produced in a furnace using pig iron and scrap metal. Electric steel making involves melting scrap steel in an electric arc furnace. Pneumatic steel making is a process where oxygen is blown into the furnace to remove impurities from the molten metal.Rate this question:
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- 12.
Which steel making process utilizes no energy for the generation of heat?
- A.
Pneumatic
- B.
Electric
- C.
Hydraulic
- D.
Closed hearth
Correct Answer
A. PneumaticExplanation
The pneumatic steel making process utilizes no energy for the generation of heat. Pneumatic steel making involves using high-pressure air to blow oxygen into the molten steel, which helps in removing impurities and reducing the carbon content. Unlike other processes like electric or closed hearth, pneumatic steel making does not require the use of electricity or external heat sources to generate the necessary heat for the process. Instead, the high-pressure air itself provides the required energy for the steel making process, making it an energy-efficient method.Rate this question:
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- 13.
The predominant method of producing steel in the United States is in...
- A.
An electric furnace
- B.
An open hearth furnace
- C.
A basic oxygen furnace
- D.
A Bessemer furnace
Correct Answer
C. A basic oxygen furnaceExplanation
A basic oxygen furnace is the predominant method of producing steel in the United States. This furnace uses oxygen to decarburize the molten iron, resulting in a lower carbon content and higher quality steel. It is a more efficient and faster process compared to other methods like the open hearth furnace or Bessemer furnace. Additionally, the electric furnace is not as commonly used for steel production in the United States.Rate this question:
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- 14.
Which cast iron is the most easily welded?
- A.
Malleable cast iron
- B.
Gray cast iron
- C.
White cast iron
- D.
Pneumatic cast iron
Correct Answer
A. Malleable cast ironExplanation
Malleable cast iron is the most easily welded among the given options. Malleable cast iron has good ductility and can be easily deformed without breaking. This property allows it to be easily welded and shaped into various forms. Gray cast iron, on the other hand, has poor weldability due to its high carbon content, which leads to the formation of brittle compounds during welding. White cast iron is also difficult to weld due to its high hardness and brittleness. Pneumatic cast iron is not a commonly known type of cast iron and its weldability is unclear.Rate this question:
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- 15.
Which of the following is an ASTM designation for steel?
- A.
E52100
- B.
1035
- C.
A 36
- D.
6063- T5
Correct Answer
C. A 36Explanation
ASTM A36 is a widely used designation for steel in the construction industry. It is a low carbon steel that exhibits good strength and formability, making it suitable for various structural applications. The A36 designation indicates that it meets the standards set by the American Society for Testing and Materials (ASTM) for this specific type of steel.Rate this question:
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- 16.
Martensitic, ferritic, and austenitic are..
- A.
Weathering steels
- B.
Malleable cast irons
- C.
Carbon steels
- D.
Stainless and heat resisting steels
Correct Answer
D. Stainless and heat resisting steelsExplanation
Martensitic, ferritic, and austenitic are types of stainless and heat resisting steels. Stainless steel is a type of steel that contains a minimum of 10.5% chromium, which enhances its corrosion resistance. Martensitic stainless steel is known for its high strength and hardness, while ferritic stainless steel is valued for its resistance to corrosion and heat. Austenitic stainless steel, on the other hand, is non-magnetic and has excellent formability and weldability. These types of steels are commonly used in applications that require resistance to corrosion and high temperatures, such as in the construction of kitchen appliances, automotive parts, and industrial equipment.Rate this question:
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- 17.
The process of metal forming in which flat round blanks are formed into curved surfaces such as cylinders, domes, and cones by turning the work piece on a mandrel and shaping it over a block with external pressure is...
- A.
Stretch forming
- B.
Shear forming
- C.
Brake forming
- D.
Deep drawing
Correct Answer
B. Shear formingExplanation
Shear forming is the correct answer because it involves the process of shaping flat round blanks into curved surfaces by turning the work piece on a mandrel and shaping it over a block with external pressure. This process is different from stretch forming, which involves stretching the material over a die, and brake forming, which involves bending the material using a brake press. Deep drawing, on the other hand, is a process where a flat sheet metal is formed into a three-dimensional shape using a punch and die.Rate this question:
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- 18.
The process of metal forming in which sheet metal is shaped by squeezing it between a punch and a die block in one or several consecutive operations is...
- A.
Brake forming
- B.
Stretch forming
- C.
Shear forming
- D.
Deep drawing
Correct Answer
A. Brake formingExplanation
Brake forming is the correct answer because it involves shaping sheet metal by squeezing it between a punch and a die block. This process can be done in one or several consecutive operations.Rate this question:
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- 19.
Which products tend to have the smoother surfaces with less surface corrosion?
- A.
Hot-rolled steel
- B.
Cold finished steel
Correct Answer
B. Cold finished steelExplanation
Cold finished steel tends to have smoother surfaces with less surface corrosion compared to hot-rolled steel. This is because cold finished steel undergoes additional processes such as cold drawing or cold rolling, which help to refine the surface and remove any imperfections. These processes also improve the dimensional accuracy and surface finish of the steel, resulting in a smoother and more corrosion-resistant surface. On the other hand, hot-rolled steel is produced at high temperatures, which can lead to a rougher surface and increased susceptibility to corrosion.Rate this question:
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- 20.
Pickling is a process which...
- A.
Imparts a decorative texture to the surface of steel
- B.
Tempers steel
- C.
Coats the surface of steel with a vitreous layer
- D.
Removes oxide scale from the surface of steel
Correct Answer
D. Removes oxide scale from the surface of steelExplanation
Pickling is a process that involves removing oxide scale from the surface of steel. Oxide scale is a layer of rust or corrosion that forms on the surface of steel over time. By using a pickling solution, the oxide scale is dissolved and removed, leaving a clean and smooth surface. This process is commonly used in steel manufacturing and fabrication to prepare the steel for further processing or to improve its appearance.Rate this question:
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- 21.
What metal coats steel that is galvanized?
- A.
Zinc
- B.
Tin
- C.
Terne metal
- D.
Aluminum
Correct Answer
A. ZincExplanation
Zinc is the correct answer because it is the metal that is commonly used to coat steel in the galvanization process. Galvanization is a method of applying a protective layer of zinc to steel to prevent corrosion and rusting. Zinc is chosen for this purpose because it has excellent corrosion resistance properties and forms a strong bond with steel. It acts as a sacrificial anode, meaning that it corrodes before the steel does, providing long-lasting protection for the underlying steel.Rate this question:
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- 22.
Metalizing consists of...
- A.
A carbon or low-alloy steel core covered with a thin sheet layer of coating metal.
- B.
Dipping a zinc-coated product in a hot phosphate solution resulting in a thin surface film of zinc phosphate
- C.
Spraying molten metal against the steel surface
- D.
Melting a vitreous coating onto the surface of steel
Correct Answer
C. Spraying molten metal against the steel surfaceExplanation
Metalizing is a process in which molten metal is sprayed against the surface of steel. This creates a thin layer of coating metal on the steel surface. The molten metal is sprayed using a specialized metalizing gun, which atomizes the metal into fine particles and propels them onto the steel surface. This process is commonly used for corrosion protection, as the coating metal provides a barrier against environmental elements. It can also be used for decorative purposes or to improve the surface properties of the steel, such as increasing hardness or wear resistance.Rate this question:
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- 23.
Identify the connection system which is usually most appropriate for moment connections in structural steel.
- A.
Bolts
- B.
Welding
- C.
Mechanically formed joints
- D.
Adhesives
Correct Answer
B. WeldingExplanation
Welding is the most appropriate connection system for moment connections in structural steel. Moment connections are designed to resist rotational forces and transfer moments between structural members. Welding provides a strong and rigid connection that can withstand these forces and ensure the stability and integrity of the structure. Unlike bolts or mechanically formed joints, welding allows for a continuous and seamless connection, minimizing potential weak points. Adhesives are not typically used for moment connections in structural steel due to their lower strength and reliability compared to welding.Rate this question:
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- 24.
Steel is sometimes fastened to concrete using...
- A.
Welding
- B.
Riveting
- C.
Expansion bolts
- D.
Mechanically formed joinery
Correct Answer
C. Expansion boltsExplanation
Steel is sometimes fastened to concrete using expansion bolts. Expansion bolts are a type of fastener that is specifically designed for attaching materials to concrete. They work by creating a secure connection between the steel and the concrete through the expansion of a bolt within a pre-drilled hole. This expansion creates a tight grip and ensures that the steel remains firmly attached to the concrete surface. Expansion bolts are commonly used in construction and provide a reliable and durable method of fastening steel to concrete.Rate this question:
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- 25.
Which method melts the edges of the metals being joined?
- A.
Welding
- B.
Brazing
- C.
Soldering
- D.
Powder actuated fastening
Correct Answer
A. WeldingExplanation
Welding is the correct answer because it is a method that uses heat to melt the edges of the metals being joined. During the welding process, a filler material is often added to create a strong bond between the metals. This melting of the edges allows for the metals to fuse together and form a solid joint.Rate this question:
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- 26.
The difference between brazing and soldering is based on...
- A.
Metals joined
- B.
Temperature
- C.
Filler materials
- D.
Both metals joined and filler materials
Correct Answer
B. TemperatureExplanation
The difference between brazing and soldering is based on temperature. Brazing involves joining metals by heating them to a higher temperature than soldering, typically above 450 degrees Celsius. In contrast, soldering involves joining metals with a lower temperature, usually below 450 degrees Celsius. The temperature difference affects the type of filler material used and the strength of the joint. Brazing typically uses a stronger filler material, such as brass or silver, while soldering uses a lower melting point filler material, like tin-lead alloy.Rate this question:
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- 27.
Which type of welding is generally used in the field?
- A.
Gas welding
- B.
Spot welding
- C.
Resistance welding
- D.
Arc welding
Correct Answer
D. Arc weldingExplanation
Arc welding is generally used in the field because it is a versatile and widely applicable welding process. It uses an electric arc between an electrode and the base material to melt and join the metals. Arc welding can be performed with various power sources and can be used for both small and large-scale projects. It is commonly used in construction, fabrication, and repair work, making it a suitable choice for field applications.Rate this question:
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- 28.
Identify the methods for making a conventional steel frame rigid
- A.
Diagonal bracing, shear panels, moment connections
- B.
Parallel bracing, stem walls, shear connections
- C.
Shoring, blocking, furring
- D.
Diagonal bracing, shoring, shear connections
Correct Answer
A. Diagonal bracing, shear panels, moment connectionsExplanation
Diagonal bracing, shear panels, and moment connections are methods used to make a conventional steel frame rigid. Diagonal bracing refers to the use of diagonal members in the frame to provide stability and prevent lateral movement. Shear panels are panels installed in the frame to resist shear forces and increase rigidity. Moment connections are connections that allow for the transfer of bending moments between members, enhancing the overall stiffness of the frame. These methods work together to ensure that the steel frame remains stable and rigid under various loads and conditions.Rate this question:
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- 29.
Which of the following is not commonly used to fireproof steel
- A.
Gypsum board
- B.
Intumescent mastics
- C.
Polyurethane
- D.
Mineral fiber
Correct Answer
C. PolyurethaneExplanation
Polyurethane is not commonly used to fireproof steel. While gypsum board, intumescent mastics, and mineral fiber are commonly used for fireproofing steel, polyurethane is not typically used for this purpose. Polyurethane is more commonly used as a sealant or insulation material, rather than for fireproofing.Rate this question:
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- 30.
Which historic structure was capped with an aluminum component in 1884
- A.
Washington monument
- B.
Lincoln memorial
- C.
Jefferson memorial
- D.
U.S. capitol
Correct Answer
A. Washington monumentExplanation
The Washington Monument was capped with an aluminum component in 1884. This was a significant event because at that time, aluminum was considered a precious metal and was more expensive than gold. The decision to use aluminum for the capstone of the monument was a symbol of the United States' technological advancements and economic prosperity. Additionally, the use of aluminum showcased its durability and resistance to corrosion, making it a suitable material for such an iconic structure.Rate this question:
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- 31.
What is known about the quantity of aluminum in the earth's crust
- A.
It is the most plentiful element in the earth's crust
- B.
It is the most plentiful metal in the earth's crust
- C.
It is the second most plentiful metal in the earth's crust after iron
- D.
It is the least common metal in the earth's crust
Correct Answer
B. It is the most plentiful metal in the earth's crustExplanation
Aluminum is known to be the most plentiful metal in the earth's crust. This means that it is found in larger quantities compared to any other metal in the earth's crust. While it may not be the most abundant element overall, when considering only metals, aluminum is the most abundant.Rate this question:
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- 32.
Where does the United States get most of the bauxite it uses
- A.
From Arkansas
- B.
From the southeastern United States
- C.
From Alaska
- D.
From outside the United States
Correct Answer
D. From outside the United StatesExplanation
The correct answer is "from outside the United States." This means that the United States does not primarily obtain bauxite from within its own borders, but rather imports it from other countries. Bauxite is a key source of aluminum, and since the United States does not have significant domestic reserves of bauxite, it relies on imports to meet its demand for this mineral.Rate this question:
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- 33.
What substances is produced by the refinement of bauxite
- A.
Iron
- B.
Alumina
- C.
Aluminum
- D.
Steel
Correct Answer
B. AluminaExplanation
Alumina is produced by the refinement of bauxite. Bauxite is a mineral that contains a high concentration of aluminum oxide, which is also known as alumina. Through the refinement process, impurities are removed from bauxite, resulting in the production of alumina. This alumina is then used as a raw material in the production of aluminum. Therefore, the correct answer is alumina.Rate this question:
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- 34.
Elevating the temperature of aluminum to between 600 and 800 degrees Fahrenheit and then cooling it slowly is
- A.
Quenching
- B.
Heat treating
- C.
Strain hardening
- D.
Annealing
Correct Answer
D. AnnealingExplanation
Annealing is a heat treatment process that involves elevating the temperature of a material, such as aluminum, to a specific range (in this case, between 600 and 800 degrees Fahrenheit) and then cooling it slowly. This process helps to relieve internal stresses, improve ductility, and enhance the material's overall mechanical properties. Therefore, the given correct answer of "annealing" accurately describes the described process of elevating the temperature of aluminum and cooling it slowly.Rate this question:
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- 35.
The number in the aluminum alloy designation 1235 that indicates that the aluminum is nearly pure with no major alloying element is
- A.
1
- B.
2
- C.
3
- D.
5
Correct Answer
A. 1Explanation
The number 1 in the aluminum alloy designation 1235 indicates that the aluminum is nearly pure with no major alloying element.Rate this question:
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- 36.
Common aluminum which has a silvery metallic surface resists corrosion because it is protected by a clear coating of
- A.
Terne metal
- B.
Zinc oxide
- C.
Acrylic film
- D.
Aluminum oxide
Correct Answer
D. Aluminum oxideExplanation
Aluminum resists corrosion because it forms a protective layer of aluminum oxide on its surface. This layer acts as a barrier, preventing further oxidation and corrosion of the underlying metal. Aluminum oxide is a hard and durable compound that is transparent, allowing the metallic surface of aluminum to remain visible. This clear coating of aluminum oxide provides long-lasting protection against corrosion, making aluminum a popular choice for various applications.Rate this question:
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- 37.
Aluminum
- A.
Should be coated with bituminous paint when buried in concrete if sulfates are present
- B.
Should be coated with bituminous paint when buried in concrete if chlorides are present
- C.
Should be coated with acrylic lacquer when buried in concrete that will be intermittently wet after being placed in service.
- D.
Should not be buried in concrete
Correct Answer
B. Should be coated with bituminous paint when buried in concrete if chlorides are presentExplanation
Aluminum should be coated with bituminous paint when buried in concrete if chlorides are present because chlorides can cause corrosion of aluminum. Bituminous paint acts as a protective barrier, preventing the chlorides from coming into direct contact with the aluminum surface. This coating helps to extend the lifespan of the aluminum and maintain its structural integrity.Rate this question:
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- 38.
Which process does not produce wrought aluminum products
- A.
Hot rolling
- B.
Cold rolling
- C.
Extruding
- D.
Die casting
Correct Answer
D. Die castingExplanation
Die casting is a process used to produce products made of non-ferrous metals, such as zinc, copper, and aluminum alloys. However, die casting is not typically used to produce wrought aluminum products. Wrought aluminum products are usually made by processes like hot rolling, cold rolling, and extruding, which involve shaping the metal through compression or stretching. Die casting, on the other hand, involves injecting molten metal into a mold under high pressure to create complex shapes, but it does not typically result in wrought aluminum products.Rate this question:
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- 39.
Most structural aluminum shapes are produced by
- A.
Hot rolling
- B.
Cold rolling
- C.
Extruding
- D.
Die casting
Correct Answer
C. ExtrudingExplanation
Extruding is the process of shaping aluminum by forcing it through a die, resulting in a continuous profile with a consistent cross-section. This method is commonly used for producing structural aluminum shapes such as beams, angles, and tubes. Hot rolling involves heating the aluminum and then passing it through a series of rollers to achieve the desired shape, while cold rolling is done at room temperature. Die casting, on the other hand, involves injecting molten aluminum into a mold to create complex shapes. However, for structural aluminum shapes, extruding is the preferred method due to its ability to produce uniform and precise profiles.Rate this question:
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- 40.
Identify the true statement
- A.
Rolled shapes are straighter, dimensionally more accurate, and have a better finish than extrusions
- B.
Extrusions are straighter, dimensionally more accurate, and have a better finish than rolled shapes
Correct Answer
B. Extrusions are straighter, dimensionally more accurate, and have a better finish than rolled shapesExplanation
Extrusions are straighter, dimensionally more accurate, and have a better finish than rolled shapes. This means that when comparing rolled shapes and extrusions, extrusions have a higher level of precision and quality. They are less likely to have any bends or curves, resulting in straighter shapes. Additionally, extrusions are more accurate in terms of their dimensions, meaning they closely match the desired measurements. Lastly, the finish of extrusions is superior, implying a smoother and more polished surface.Rate this question:
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- 41.
In which casting process is the aluminum forced into the mold under pressure
- A.
Die casting
- B.
Permanent-mold casting
- C.
Semi-permanent mold casting
- D.
Sand casting
Correct Answer
A. Die castingExplanation
Die casting is the correct answer because it is a casting process in which molten aluminum is forced into a mold cavity under high pressure. The mold, also known as a die, is typically made of steel and has the desired shape of the final product. The high pressure ensures that the molten metal completely fills the mold and solidifies quickly, resulting in a precise and accurate final product. Die casting is commonly used for manufacturing complex and detailed aluminum parts with excellent dimensional accuracy and surface finish.Rate this question:
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- 42.
A satin finish on aluminum is in which category of finishes
- A.
Chemical
- B.
Mechanical
- C.
Anodized
- D.
Vitreous
Correct Answer
B. MechanicalExplanation
A satin finish on aluminum is categorized as a mechanical finish. This type of finish is achieved by using abrasive materials or techniques to create a smooth and even surface texture on the aluminum. It involves processes such as sanding, brushing, or polishing to remove imperfections and create a soft, matte appearance. Chemical finishes, on the other hand, involve the use of chemical treatments to alter the surface properties of the aluminum, while anodized finishes involve an electrochemical process to create a protective layer on the surface. Vitreous finishes refer to finishes that have a glass-like appearance, which is not applicable in this case.Rate this question:
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- 43.
An anodized finish is
- A.
A zinc coating
- B.
Created by polishing
- C.
A texture of small uniform deformations
- D.
An oxide coating
Correct Answer
D. An oxide coatingExplanation
An anodized finish refers to a process where a protective oxide coating is formed on the surface of a metal, typically aluminum. This coating is created by subjecting the metal to an electrolytic process, which results in the formation of a thick and durable layer of oxide. This oxide coating provides several benefits, such as increased corrosion resistance, improved durability, and enhanced aesthetic appearance. Therefore, the correct answer is an oxide coating.Rate this question:
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- 44.
Which of the following is not a method of connecting aluminum
- A.
Stitching
- B.
Hedging
- C.
Staking
- D.
Brazing
Correct Answer
B. Hedging -
- 45.
Which of the following is not a method of welding aluminum
- A.
Sump welding
- B.
Flash welding
- C.
MIG welding
- D.
Resistance welding
Correct Answer
A. Sump weldingExplanation
Sump welding is not a method of welding aluminum. The other three options mentioned - flash welding, MIG welding, and resistance welding - are all commonly used methods for welding aluminum. Sump welding, however, is not a recognized welding technique for aluminum.Rate this question:
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- 46.
The method of forming joints in aluminum when their contours are too complex or sccess is too limited for welding is
- A.
MIG
- B.
TIG
- C.
Soldering
- D.
Brazing
Correct Answer
D. BrazingExplanation
Brazing is a method used to form joints in aluminum when their contours are too complex or access is limited for welding. In brazing, a filler metal is heated above its melting point and distributed between the two aluminum pieces to be joined. The filler metal then solidifies and forms a strong bond between the aluminum parts. This process is particularly useful when welding is not feasible due to the complexity of the joint or limited access for traditional welding methods like MIG or TIG.Rate this question:
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- 47.
Difficulties in soldering aluminum are caused by
- A.
The chemical reaction between aluminum and the filler metals
- B.
The tendency for aluminum to wrap at the temperature required for soldering
- C.
The inability of the solder to adhere to the natural oxide film on aluminum
- D.
The damage typically done to aluminum around the connection
Correct Answer
C. The inability of the solder to adhere to the natural oxide film on aluminumExplanation
The correct answer is the inability of the solder to adhere to the natural oxide film on aluminum. When aluminum is exposed to air, it forms a thin layer of oxide on its surface. This oxide layer acts as a barrier, preventing the solder from properly bonding with the aluminum. As a result, it becomes difficult to achieve a strong and reliable solder joint when working with aluminum.Rate this question:
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- 48.
The alloy of copper and zinc is known as
- A.
Anodized copper
- B.
Brass
- C.
Terne metal
- D.
Bronze
Correct Answer
B. BrassExplanation
The alloy of copper and zinc is known as brass. Brass is a commonly used alloy that is composed of copper and zinc in varying proportions. It is valued for its durability, corrosion resistance, and attractive golden color. Brass is used in a wide range of applications, including musical instruments, plumbing fittings, decorative items, and electrical connectors.Rate this question:
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- 49.
Which type of wood is the traditional choice for contemporary framing and structure?
- A.
Hardwood
- B.
Softwood
- C.
Medium wood
- D.
Flexible wood
Correct Answer
B. SoftwoodExplanation
Softwood is the traditional choice for contemporary framing and structure because it is more readily available, cost-effective, and has desirable properties such as being lightweight, easy to work with, and having good structural strength. Softwood comes from coniferous trees like pine, spruce, and fir, which are fast-growing and have straight grain patterns, making them suitable for construction purposes. Hardwood, on the other hand, is denser and more expensive, typically used for furniture and decorative purposes rather than structural framing. Medium wood and flexible wood are not commonly used terms in the context of framing and structure.Rate this question:
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- 50.
In which season is the darker part of an annual ring in a tree's section grown?
- A.
Summer
- B.
Fall
- C.
Winter
- D.
Spring
Correct Answer
A. SummerExplanation
The darker part of an annual ring in a tree's section is grown during the summer. This is because during the summer months, trees experience optimal conditions for growth, such as warm temperatures and an abundance of sunlight. These favorable conditions promote the production of larger and denser cells in the tree's trunk, resulting in a darker ring in the annual growth pattern.Rate this question:
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Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.
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Current Version
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Mar 17, 2023Quiz Edited by
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Oct 21, 2010Quiz Created by
Laurenmariel
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