Aggregate and Cement Testing - Numerical Applications
Q. What is the primary purpose of aggregate in concrete?
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A.
To provide thermal insulation
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B.
To reduce shrinkage
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C.
To provide strength and bulk
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D.
To enhance aesthetic appearance
Solution
The primary purpose of aggregate in concrete is to provide strength and bulk, making up the majority of the concrete volume.
Correct Answer: C — To provide strength and bulk
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Q. What is the standard test for determining the compressive strength of cement?
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A.
Flexural Strength Test
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B.
Blaine Air Permeability Test
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C.
Hydraulic Conductivity Test
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D.
Standard Test Method for Compressive Strength of Hydraulic Cement Mortars
Solution
The Standard Test Method for Compressive Strength of Hydraulic Cement Mortars is used to determine the compressive strength of cement.
Correct Answer: D — Standard Test Method for Compressive Strength of Hydraulic Cement Mortars
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Q. What is the typical water-cement ratio for normal concrete?
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A.
0.2
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B.
0.4
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C.
0.5
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D.
0.7
Solution
The typical water-cement ratio for normal concrete is around 0.5, which balances workability and strength.
Correct Answer: C — 0.5
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Q. Which of the following materials is commonly used as a fine aggregate?
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A.
Gravel
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B.
Sand
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C.
Crushed Stone
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D.
Cinder
Solution
Sand is commonly used as a fine aggregate in concrete, providing the necessary fine particles for the mix.
Correct Answer: B — Sand
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Q. Which test is used to determine the workability of fresh concrete?
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A.
Slump Test
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B.
Compression Test
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C.
Tensile Test
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D.
Flexural Test
Solution
The Slump Test is commonly used to determine the workability of fresh concrete by measuring the slump of a concrete cone.
Correct Answer: A — Slump Test
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