General Contractor Practice Exam

What is the standard nozzle size used for sandblasting brick?

1. 1/8

2. 1/4

3. 1/2

4. 3/4

The correct answer is: 1/4

The standard nozzle size used for sandblasting brick is typically 1/4 inch. This size strikes a balance between delivering sufficient abrasive pressure and ensuring effective cleaning without damaging the brick surface. Using a nozzle that is too small may lead to an inadequate volume of abrasive material, reducing cleaning efficiency, while a nozzle that is too large could impart excessive force, which risks damaging the brick or causing over-abrading. In the context of different materials and surfaces, selecting the proper nozzle size is crucial for achieving the desired outcome. For example, softer materials might require smaller nozzles to prevent damage, whereas tougher substrates might tolerate larger nozzles. Therefore, for sandblasting brick, the 1/4 inch nozzle is the standard choice to ensure both effectiveness and safety for the material being worked on.