101. Which of the following elements is a common alloying element in steel?
a) Copper
b) Aluminum
c) Nickel
d) Zinc
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Correct answer: c) Nickel
Explanation: Nickel is commonly used as an alloying element in steel to enhance its strength, toughness, and corrosion resistance.
102. Which metal is primarily used as a reinforcement material in reinforced concrete?
a) Aluminum
b) Copper
c) Steel
d) Zinc
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Correct answer: c) Steel
Explanation: Steel is the primary metal used as reinforcement in reinforced concrete due to its high tensile strength and compatibility with concrete.
103. Which of the following metals is highly resistant to corrosion in marine environments?
a) Aluminum
b) Copper
c) Stainless steel
d) Brass
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Correct answer: c) Stainless steel
Explanation: Stainless steel, with its high chromium content, exhibits excellent corrosion resistance, making it suitable for marine applications.
104. Which metal is commonly used for electrical wiring due to its high conductivity?
a) Aluminum
b) Copper
c) Zinc
d) Nickel
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Correct answer: b) Copper
Explanation: Copper is widely used for electrical wiring and conductors due to its high electrical conductivity.
105. Which metal is the primary constituent of bronze?
a) Copper
b) Aluminum
c) Tin
d) Zinc
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Correct answer: a) Copper
Explanation: Bronze is an alloy primarily composed of copper, typically with the addition of tin, which enhances its strength and hardness.
106. Which metal is commonly used for roofing due to its corrosion resistance and aesthetic appeal?
a) Aluminum
b) Copper
c) Zinc
d) Stainless steel
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Correct answer: c) Zinc
Explanation: Zinc is frequently used for roofing materials due to its corrosion resistance, longevity, and the attractive patina it develops over time.
107. Which metal is known for its excellent heat conductivity and is often used in heating and cooling systems?
a) Aluminum
b) Copper
c) Iron
d) Titanium
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Correct answer: b) Copper
Explanation: Copper has excellent heat conductivity, making it suitable for applications such as heat exchangers and plumbing in heating and cooling systems.
108. Which metal is commonly used for plumbing pipes and fittings due to its corrosion resistance and durability?
a) Aluminum
b) Copper
c) Iron
d) Brass
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Correct answer: d) Brass
Explanation: Brass, an alloy of copper and zinc, is frequently used for plumbing pipes and fittings due to its corrosion resistance, durability, and ease of manufacturing.
109. Which metal is often used as a protective coating for steel to prevent corrosion?
a) Aluminum
b) Copper
c) Zinc
d) Nickel
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Correct answer: c) Zinc
Explanation: Zinc is commonly used as a sacrificial coating (galvanizing) on steel to protect it from corrosion by providing a barrier and sacrificing itself in the presence of corrosive elements.
110. Which metal is commonly used for structural framing in modern construction?
a) Aluminum
b) Copper
c) Steel
d) Titanium
View Answer
Correct answer: c) Steel
Explanation: Steel is widely used for structural framing in modern construction due to its strength, durability, and versatility.
