# Concrete Technology Questions and Answers – Shrinkage

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

1. Shrinkage is the reduction in the volume of a fresh hardened concrete exposed to ambient temp and humidity.
a) True
b) False

Explanation: Shrinkage is the reduction in the volume of a fresh hardened concrete exposed to ambient temp and humidity.

2. How many types of shrinkages, caused due to loss of water?
a) 1
b) 2
c) 3
d) 4

Explanation: There are 3 types of shrinkage that are caused due to loss of water i.e. plastic, drying and autogenous.

3. How many types of shrinkages, caused due to cooling and carbonation?
a) 1
b) 2
c) 3
d) 4

Explanation: There are 2 types of shrinkage which are caused due to cooling and carbonation.

4. Reduction in the volume due to shrinkage causes ____________
a) Low volume
b) Volumetric strain
c) Volumetric stress
d) W/c ratio

Explanation: Reduction in the volume due to shrinkage causes volumetric strain in freshly hardened concrete.

5. Volumetric strain is equal to ___________ times the linear strain.
a) 1
b) 2
c) 3
d) 4

Explanation: Volumetric strain is equal to 3 times the linear strain in freshly hardened concrete.

6. In practice, shrinkage is measured simply as a ____________
a) Linear strain
b) Linear stress
c) Volumetric strain
d) Volumetric stress

Explanation: In practice, shrinkage is measured simply as a linear strain in freshly hardened concrete.

7. Shrinkage in concrete is caused mainly by a loss of water by evaporation or by hydration of cement.
a) True
b) False

Explanation: Shrinkage in concrete is caused mainly by a loss of water by evaporation or by hydration of cement.

8. However, fall of temperature and carbonation may also cause shrinkage.
a) True
b) False

Explanation: However, fall of temperature and carbonation may also cause shrinkage.

9. From the below figure, what does A signify?

a) Drying shrinkage
b) Wetting shrinkage
c) Expansion on re wetting
d) Contraction

Explanation: A is the total drying shrinkage i.e. of 2 contraction in the above figure of freshly hardened concrete.

10. From the below figure, what does B signify?

a) Drying shrinkage
b) Wetting shrinkage
c) Expansion on re wetting
d) Contraction

Explanation: In the above figure, B signifies the expansion on re wetting from higher concentration of drying to lower.

Sanfoundry Global Education & Learning Series – Concrete Technology.

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