Aggregate and Cement Testing - Competitive Exam Level
Q. What is the main advantage of using high-strength steel in construction?
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A.
Lower cost
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B.
Higher ductility
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C.
Increased load-bearing capacity
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D.
Easier to weld
Solution
High-strength steel provides increased load-bearing capacity, allowing for lighter structures and reduced material usage.
Correct Answer: C — Increased load-bearing capacity
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Q. What is the main function of admixtures in concrete?
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A.
To increase the weight of concrete
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B.
To improve workability and durability
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C.
To reduce the cost of materials
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D.
To change the color of concrete
Solution
Admixtures are added to concrete to improve its workability, durability, and other properties without changing the basic composition.
Correct Answer: B — To improve workability and durability
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Q. What is the maximum size of coarse aggregate typically used in concrete?
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A.
10 mm
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B.
20 mm
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C.
40 mm
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D.
50 mm
Solution
The maximum size of coarse aggregate used in concrete is typically 20 mm to 40 mm, depending on the application.
Correct Answer: C — 40 mm
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Q. What is the primary characteristic of lightweight aggregates?
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A.
High thermal conductivity
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B.
Low density
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C.
High water absorption
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D.
High compressive strength
Solution
Lightweight aggregates are characterized by their low density, which helps reduce the overall weight of concrete.
Correct Answer: B — Low density
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Q. Which of the following is a common test for the soundness of cement?
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A.
Vicat test
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B.
Le Chatelier test
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C.
Blaine test
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D.
Slump test
Solution
The Le Chatelier test is used to determine the soundness of cement by checking for expansion due to hydration.
Correct Answer: B — Le Chatelier test
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Q. Which of the following is NOT a type of cement?
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A.
Ordinary Portland Cement
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B.
Rapid Hardening Cement
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C.
High Alumina Cement
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D.
Reinforced Cement
Solution
Reinforced Cement is not a type of cement; it refers to concrete that has been reinforced with steel.
Correct Answer: D — Reinforced Cement
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Q. Which test is used to determine the fineness of cement?
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A.
Vicat test
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B.
Blaine air permeability test
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C.
Le Chatelier test
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D.
Soundness test
Solution
The Blaine air permeability test measures the fineness of cement by determining the surface area of the cement particles.
Correct Answer: B — Blaine air permeability test
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