Question

A test is being conducted on the turbine generator module (Location 10). What is the longest
time a worker without hearing protection can stay in this module without exceeding the
exposure time permitted?
A. 10 minutes
B. 15 minutes
C. 30 minutes
D. 110 minutes

Answer 1

The characteristics of the sound and the exposure regulations allow finding that the correct answer for the maximum exposure time in zone 10 (turbine) is

     B. 15 minutes

Sound intensity can be perceived in a very wide range of values ​​from 10⁻¹² W/m² to 10⁰ W/m², to treat such a wide range it is useful to use the logarithmic scale, therefore a unit called decibles was defined

         $\beta = 10 \ log ( \frac{I}{I_o} )$

Where I is the intensity of the sounf and I₀ is the umbral intensity ( 10⁻¹² W/m²)

On this scale, the increase of one unit corresponds to a 10-fold increase in sound intensity. The pain threshold is at 120 dβ.

The World Health Organization (WHO) states that prolonged exposure to sounds above 65 dβ can cause adverse health effects, such as: feeling restless, decreased concentration, sleep problems, stress, aggressiveness, reduced ear sensitivity range, buzzing, etc.

Due to these problems, there is legislation on the noise level and the maximum time allowed. In the diagram shown there is a table of exposure time and present sound level.

In this case, they indicate to determine the time of permanence in zone 10 that corresponds to the turbine generation module, which has a sound level of 110 db, consequently the maximum time of permanence without headphones is 30 min.

Using the characteristics of the sound and the exposure regulations we find that the correct answer for the maximum exposure time is

      B. 15 minutes

Learn more here:  brainly.com/question/14597392

Answer 2

The longest time a worker can stay in the turbine generator room without hearing protection is thirty minutes as enforced by the regulations of the Occupational Safety and Health Administration (OSHA).

Protection against noise exposure according to OSHA is usually provided when workers are subjected to working environments within certain sound levels calculated in decibels (dB).

Exposure to loud noise will lead to hearing loss over time for workers who work in noisy environments as loud noises damage the nerves of the inner ear. As such the use of administrative or engineering controls is necessary, and in the event where these are not effective in reducing sound levels then personal protective equipment (PPE) such as ear muffs is provided.

Within the table, the noise exposure time permitted with the use of hearing protection for workers doing work in the Turbine Generator Module (Boiler) is thirty (30) minutes.

To learn more about OSHA see: https://brainly.com/question/8180499?referrer=searchResults