Construction Supervisor License Practice Exam

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What is the diameter of a number 7 reinforcing bar, in inches?

  1. 1/2

  2. 5/8

  3. 3/4

  4. 7/8

The correct answer is: 7/8

The diameter of a number 7 reinforcing bar, commonly used in construction, is actually 7/8 inches. This measurement corresponds to the standard sizes of reinforcing bars, where the number designates the diameter in eighths of an inch. Specifically, a number 7 bar means it is 7 eighths of an inch in diameter, which directly translates to 0.875 inches. Understanding the numbering system for reinforcing bars is crucial for construction supervisors, as it affects not only structural integrity but also compliance with design specifications.

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