Question

1. before using a hammer drill or rotary hammer to drill into concrete, it is important to

a. install a flying debris guard on the drill chuck
b. review silica exposure standards
c. confirm the location of coworkers
d. spray down the concrete surface with water

Explanation:

When using a hammer - drill or rotary hammer on concrete, silica dust can be generated which is harmful. Reviewing silica exposure standards helps in taking necessary safety precautions. Installing a debris guard on the chuck is not the most crucial first - step, confirming coworker location is not the main safety concern related to the drilling operation itself, and spraying water on the surface is not the first thing to do before starting.

Answer:

b. review silica exposure standards