# Concrete Technology Questions and Answers – Factors Affecting Shrinkage

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

1. It is observed that 14-34% of the 20 years shrinkage occurs in ________
a) 2 weeks
b) 3 months
c) 6 months
d) 1 year

Explanation: It is observed that 14-34% of the 20 years shrinkage occurs in 2 weeks.

2. It is observed that 40-80% of the 20 years shrinkage occurs in _____________
a) 2 weeks
b) 3 months
c) 6 months
d) 1 year

Explanation: It is observed that 40-80% of the 20 years shrinkage occurs in 3 months.

3. It is observed that 66-85% of the 20 years shrinkage occurs in _____
a) 2 weeks
b) 3 months
c) 6 months
d) 1 year

Explanation: It is observed that 66 to 85% of the 20 years shrinkage occurs in 1 year.

4. If the concrete is placed in 100% relative humidity for a length of time then there WON’T be any shrinkage.
a) True
b) False

Explanation: If the concrete is placed in 100% relative humidity for a length of time then there won’t be any shrinkage instead there’ll be slight swelling.

5. The magnitude of autogenous shrinkage is ________
a) .001
b) .0001
c) .01
d) .1

Explanation: The magnitude of autogenous shrinkage is in the order of about .0001.
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6. From the below figure, what is A here?

a) Grave
b) Sand stone
c) Quartz
d) Granite

Explanation: Aggregates plays an important role in the shrinkage properties of concrete. According to option, A is Sand stone.

7. From the below figure, what is B here?

a) Grave
b) Sand stone
c) Quartz
d) Granite

Explanation: Aggregates plays an important role in the shrinkage properties of concrete. According to option, B is Granite.

8. From the below figure, what is C here?

a) Grave
b) Sand stone
c) Quartz
d) Granite

Explanation: Aggregates plays an important role in the shrinkage properties of concrete. According to option, C is Quartz.

9. Which aggregates have high shrinkage?
a) Grave
b) Sand stone
c) Quartz
d) Granite

Explanation: Aggregates plays an important role in the shrinkage properties of concrete. And sand stone has high shrinkage.

10. Which aggregates have low shrinkage?
a) Grave
b) Sand stone
c) Quartz
d) Granite

Explanation: Aggregates plays an important role in the shrinkage properties of concrete. And quartz has low shrinkage.

Sanfoundry Global Education & Learning Series – Concrete Technology.

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