This set of Concrete Technology Multiple Choice Questions & Answers (MCQs) focuses on “Destructive Testing”.
1. Compressive strength of hardened concrete is done by _________
a) Cube test
b) Tensile splitting test
c) Concrete core test
d) Flexure test
View Answer
Explanation: Compressive strength of hardened concrete is done by cube test. For cube test two types of specimens either cubes of 15cm X 15cm X 15cm or 10cm X 10cm x 10cm depending upon the size of aggregate are used.
2. It is about __________ times the tensile stress determined by the splitting test.
a) Equal
b) .5
c) 1.5
d) 2
View Answer
Explanation: The theoretical maximum tensile stress at the bottom face at failure is calculated. This is termed the modulus of rupture. It is about 1.5 times the tensile stress determined by the splitting test.
3. A ratio of core height-to-diameter of __________ gives a standard cylinder test.
a) 1
b) 2
c) 3
d) 4
View Answer
Explanation: A ratio of core height-to-diameter of 2 gives a standard cylinder test. The ratio of core height to diameter and the location where the core is taken affect the strength.
4. In Concrete core test the strength is ________ at the top and _________ at the bottom.
a) Lowest, lowest
b) Lowest, highest
c) Highest, lowest
d) Highest, highest
View Answer
Explanation: The strength is lowest at the top surface and increases with depth through the element.
5. Which of the following compound is used for fine polishing?
a) Aluminum oxide
b) Nitric oxide
c) Silicon carbide
d) Iron oxide
View Answer
Explanation: Powder form of aluminum oxide is used for fine polishing process. It is surface treatment process.
6. Evaluation of cracks _________ be determined after cracking.
a) Can
b) Can’t
c) Sometimes
d) Depends on the structure
View Answer
Explanation: Evaluation of cracks can be determined after cracking i.e., due to structural, thermal, chemical, physical activities.
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.
If you find a mistake in question / option / answer, kindly take a screenshot and email to [email protected]
- Check Civil Engineering Books
- Apply for Civil Engineering Internship
- Practice Civil Engineering MCQs
- Check Concrete Technology Books
