Concrete Technology Questions and Answers – HPC

This set of Concrete Technology Multiple Choice Questions & Answers (MCQs) focuses on “HPC”.

1. It is ___________ strength and ___________ permeability.
a) High, high
b) Low, low
c) High, low
d) Low, high
View Answer

Answer: c
Explanation: It is specifically chosen so as to have particularly appropriate properties for the expected use of the structure such as high strength and low permeability.

2. High Performance concrete works out to be economical.
a) True
b) False
View Answer

Answer: a
Explanation: High Performance concrete works out to be economical, even though its initial cost is high.

3. HPC is not used in high span bridges.
a) True
b) False
View Answer

Answer: b
Explanation: Major applications of high-performance concrete in the field of Civil Engineering constructions have been in the areas of long-span bridges, high-rise buildings or structures, highway pavements, etc.
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4. Concrete having 28- days’ compressive strength in the range of 60 to 100 MPa.
a) HPC
b) VHPC
c) OPC
d) HSC
View Answer

Answer: a
Explanation: High Performance Concrete having 28- days’ compressive strength in the range of 60 to 100 MPa.

5. Concrete having 28-days compressive strength in the range of 100 to 150 MPa.
a) HPC
b) VHPC
c) OPC
d) HSC
View Answer

Answer: b
Explanation: Very high performing Concrete having 28-days compressive strength in the range of 100 to 150 MPa.
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6. High-Performance Concrete is ____________ as compared to Normal Strength Concrete.
a) Less brittle
b) Brittle
c) More brittle
d) Highly ductile
View Answer

Answer: c
Explanation: High-Performance Concrete is more brittle as compared to Normal Strength Concrete (NSC), especially when high strength is the main criteria.

7. The choice of cement for high-strength concrete should not be based only on mortar-cube tests but it should also include tests of compressive strengths of concrete at ___________ days.
a) 28, 56, 91
b) 28, 60, 90
c) 30, 60, 90
d) 30, 45, 60
View Answer

Answer: a
Explanation: The choice of cement for high-strength concrete should not be based only on mortar-cube tests but it should also include tests of compressive strengths of concrete at 28, 56, and 91 days.

8. For high-strength concrete, a cement should produce a minimum 7-days mortar-cube strength of approximately ___ MPa.
a) 10
b) 20
c) 30
d) 40
View Answer

Answer: c
Explanation: For high-strength concrete, a cement should produce a minimum 7-days mortar-cube strength of approximately 30 MPa.

9. ____________ mm nominal maximum size aggregates gives optimum strength.
a) 9.5 and 10.5
b) 10.5 and 12.5
c) 9.5 and 12.5
d) 11.5 and 12.5
View Answer

Answer: c
Explanation: Many studies have found that 9.5 mm to 12.5 mm nominal maximum size aggregates gives optimum strength.
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10. Due to low w/c ratio _____________
a) It doesn’t cause any problems
b) It causes problems
c) Workability is easy
d) Strength is more
View Answer

Answer: b
Explanation: Due to the low w/c ratio, it causes problems so superplasticizers are used.

Sanfoundry Global Education & Learning Series – Concrete Technology.

To practice all areas of Concrete Technology, here is complete set of 1000+ Multiple Choice Questions and Answers.

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Manish Bhojasia - Founder & CTO at Sanfoundry
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