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Q: Soundness of aggregate test is important for which of the following types of atmosphere conditions?
  • A. Concrete exposed to action of water
  • B. Concrete exposed the action of frost
  • C. Concrete exposed to action of sunlight
  • D. Concrete exposed to action of rain.
Correct Answer: Option B - When concrete is exposed to the frost action soundness of aggregate test is important to improve the strength and durability of concrete.
B. When concrete is exposed to the frost action soundness of aggregate test is important to improve the strength and durability of concrete.

Explanations:

When concrete is exposed to the frost action soundness of aggregate test is important to improve the strength and durability of concrete.