North Carolina General Contractors Practice Exam

What factor is commonly used in calculating mortar requirements?

1. 3.5 cf/100 sf

2. 4.5 cf/100 sf

3. 5.5 cf/100 sf

4. 6.5 cf/100 sf

The correct answer is: 5.5 cf/100 sf

The correct answer is 5.5 cubic feet per 100 square feet when calculating mortar requirements. This figure represents a benchmark used in masonry work to estimate the quantity of mortar needed based on the coverage area of masonry units like bricks or blocks. Mortar is a critical component in masonry construction, as it not only bonds the bricks or blocks together but also helps in achieving structural integrity and durability. The 5.5 cf/100 sf standard is derived from practical applications in the field, taking into account typical joint sizes and the thickness of the mortar used between units. Using this standard allows contractors to more accurately predict the amount of mortar necessary for a given project, leading to better resource management and minimizing waste. This ensures that the work proceeds smoothly and efficiently, ultimately contributing to the quality and longevity of the masonry structure. Other options present alternative figures that are not commonly recognized as standard for mortar calculations. It's important for contractors to rely on widely accepted benchmarks to ensure accuracy in their estimates.