Properties of Concrete and Steel - Problem Set
Q. What is the effect of adding too much water to a concrete mix?
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A.
Increases strength
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B.
Decreases workability
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C.
Increases porosity and reduces strength
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D.
Has no effect
Solution
Adding too much water increases porosity and reduces the strength of concrete, leading to poor performance.
Correct Answer: C — Increases porosity and reduces strength
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Q. What is the main advantage of using high-performance concrete?
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A.
Lower cost
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B.
Higher strength and durability
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C.
Easier to work with
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D.
Faster setting time
Solution
High-performance concrete offers higher strength and durability, making it suitable for demanding applications.
Correct Answer: B — Higher strength and durability
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Q. Which property of steel is most important for structural applications?
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A.
Ductility
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B.
Thermal conductivity
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C.
Corrosion resistance
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D.
Density
Solution
Ductility is crucial for structural steel as it allows the material to deform under stress without breaking.
Correct Answer: A — Ductility
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Q. Which type of steel is commonly used for reinforcement in concrete structures?
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A.
Mild steel
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B.
Stainless steel
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C.
High carbon steel
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D.
Alloy steel
Solution
Mild steel is commonly used for reinforcement in concrete structures due to its ductility and strength.
Correct Answer: A — Mild steel
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