Properties of Concrete and Steel - Numerical Applications
Q. What is the typical compressive strength range of normal concrete?
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A.
10-20 MPa
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B.
20-30 MPa
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C.
30-40 MPa
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D.
40-50 MPa
Solution
Normal concrete typically has a compressive strength range of 20-40 MPa.
Correct Answer: C — 30-40 MPa
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Q. What is the typical density range of normal concrete?
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A.
1200-1600 kg/m³
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B.
1600-2400 kg/m³
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C.
2400-3000 kg/m³
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D.
3000-4000 kg/m³
Solution
Normal concrete typically has a density range of 1600-2400 kg/m³.
Correct Answer: B — 1600-2400 kg/m³
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Q. What is the water-cement ratio for achieving maximum strength in 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.
0.6
Solution
A water-cement ratio of 0.4 to 0.5 is generally optimal for achieving maximum strength in concrete.
Correct Answer: C — 0.5
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Q. What is the yield strength of typical structural steel?
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A.
200 MPa
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B.
250 MPa
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C.
300 MPa
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D.
350 MPa
Solution
The yield strength of typical structural steel is around 250 MPa.
Correct Answer: B — 250 MPa
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