Coarse aggregate is over what diameter in inches?

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Prepare for the Glencoe Carpentry Exam. Practice with flashcards and multiple-choice questions, each offering hints and explanations. Equip yourself for success on your test day!

Multiple Choice

Coarse aggregate is over what diameter in inches?

Explanation:
Understanding how aggregate is classified by size relies on sieve openings. Particles larger than a given opening are called coarse; those small enough to pass through are fine. In this context, the threshold is 1/4 inch. Any piece bigger than 1/4 inch is considered coarse and is retained on the 1/4 inch sieve, forming the coarse portion of the mix. Smaller particles pass through and become fine aggregate, which helps with workability and finish. This 1/4 inch boundary is chosen to balance strength, density, and ease of placement in typical carpentry concrete work.

Understanding how aggregate is classified by size relies on sieve openings. Particles larger than a given opening are called coarse; those small enough to pass through are fine. In this context, the threshold is 1/4 inch. Any piece bigger than 1/4 inch is considered coarse and is retained on the 1/4 inch sieve, forming the coarse portion of the mix. Smaller particles pass through and become fine aggregate, which helps with workability and finish. This 1/4 inch boundary is chosen to balance strength, density, and ease of placement in typical carpentry concrete work.

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