This set of Concrete Technology Multiple Choice Questions & Answers (MCQs) focuses on “Various Testing Methods”.
1. Identify the type of destructive testing.
a) Radiographic test
b) Dye penetrant test
c) Creep test
d) Visual testing
View Answer
Explanation: Creep test is a type of destructive test. It is defined as slow plastic deformation at high temperatures for a longer time under constant stresses. Creep occurs at room temperature and at high temperatures.
2. Which test can be performed without skilled labor?
a) Probe test
b) Bend liquid test
c) Dye penetrant test
d) Torsion test
View Answer
Explanation: Dye penetrant test does not require any skilled labor. This method only detects surface discontinuities and this test needs to be observed with naked eyes or with low magnifying glass.
3. 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.
4. In the soundness test a specimen of hardened cement paste is _______ for a fixed time.
a) Freeze
b) Dry
c) Boiled
d) Dipped in water
View Answer
Explanation: A specimen of hardened cement paste is boiled for a fixed time so that if there is any tendency of increase or decrease in size can be detected.
5. On cooling below 1250oC, C3S decomposes ______
a) Fast
b) Slowly
c) Never
d) Depends on the conditions
View Answer
Explanation: On cooling below 1250oC, C3S decomposes slowly but, if cooling is not too slow, C3S remains unchanged and is relatively stable at ordinary temperatures.
6. The loss in weight should not exceed ______ percent when tested with sodium sulphate and ______ percent with magnesium sulphate solution.
a) 12, 18
b) 18, 12
c) 10, 15
d) 15, 10
View Answer
Explanation: The loss in weight should not exceed 12 percent when tested with sodium sulphate and 18 percent with magnesium sulphate solution.
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]
- Apply for Civil Engineering Internship
- Check Civil Engineering Books
- Check Concrete Technology Books
- Practice Civil Engineering MCQs
