North Carolina Building Contractor License Practice Exam

What should exposure to impulsive or impact noise not exceed?

1. Grounded

2. 30 dBA

3. 40 dBA

4. 50 dBA

The correct answer is: Grounded

When discussing exposure to impulsive or impact noise, it is essential to understand the guidelines established for noise levels to protect individuals' hearing and overall well-being. Impulsive or impact noise refers to short bursts of sound that can create a sudden change in pressure, such as the sound of a gunshot, a hammer striking a nail, or other similar noises. The correct standard for impulsive or impact noise usually specifies that exposure should not exceed a certain decibel level. In various regulatory frameworks, the maximum permissible level for such noise is often set at 140 dB peak sound pressure level (SPL) for impulsive noise. However, when looking at the options provided, a focus on lower levels like 30 dBA, 40 dBA, and 50 dBA indicates consolation for continuous or steady-state noise exposure rather than impulsive noise. While the concept of being "grounded" as a choice doesn't pertain to a measurable sound level, it implies a state of compliance with safety practices that typically would avoid the hazards arising from high-level impulsive noise exposure. Being grounded can refer to employing safety protocols and technologies that mitigate risks associated with high-impact sounds, emphasizing the importance of occupational health standards that focus on preventing exposure to