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When taking strength test of shotcrete, a sample must be taken at least every____ yards.

  1. 10

  2. 15

  3. 20

  4. 50

The correct answer is: 50

In the context of shotcrete applications, it's crucial to ensure the quality and strength of the material being used, especially in construction environments where structural integrity is paramount. The requirement to take a sample at least every 50 yards is established to ensure a comprehensive representation of the shotcrete being applied. By sampling every 50 yards, it allows for adequate monitoring of consistency, quality, and performance standards over larger areas. This sampling frequency helps to identify any variations or issues that may occur during application and allows for timely adjustments to the mixing process or application method if necessary. It ensures that the contractor maintains compliance with industry standards and delivers a reliable final product. By adhering to this regulation, contractors can maintain the strength and durability necessary for their projects. Other options suggest more frequent sampling intervals which may not be necessary or practical for larger applications, leading to potential inefficiencies in the testing process.