2. In daily work activities (8 hours), a technical officer normally works for 1.5 hours to check a motor room where the sound pressure level is 93.2 dB(A). The officer then inspects a compressor and its components for 2.5 hours where the sound pressure level is “x" dB(A), and also takes 2 hours in another machine room where the sound pressure level is 91.8 dB(A). In the remaining period, he works in an office where the sound pressure level is around 66 dB(A). What is the maximum value of the sound pressure level “x" if the noise exposure dosage of the officer does not exceed the limit? Note: In the following questions, unless otherwise specified, the air density and the speed of sound (in air) are 1.2 kg/m³ and 344 m/s, respectively.

2. In daily work activities (8 hours), a technical officer normally works for 1.5 hours to check a motor room where the sound pressure level is 93.2 dB(A). The officer then inspects a compressor and its components for 2.5 hours where the sound pressure level is “x" dB(A), and also takes 2 hours in another machine room where the sound pressure level is 91.8 dB(A). In the remaining period, he works in an office where the sound pressure level is around 66 dB(A). What is the maximum value of the sound pressure level “x" if the noise exposure dosage of the officer does not exceed the limit? Note: In the following questions, unless otherwise specified, the air density and the speed of sound (in air) are 1.2 kg/m³ and 344 m/s, respectively.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Pressurized pipe flow

A 15-kilometer-long pipe with a pipe diameter of one meter transports water at a speed of one meter per second. The pipe has a friction coefficient of 0.005. Calculate the frictional head loss?

Question

2. In daily work activities (8 hours), a technical officer normally works for 1.5 hours to check a
motor room where the sound pressure level is 93.2 dB(A). The officer then inspects a
compressor and its components for 2.5 hours where the sound pressure level is "x" dB(A), and
also takes 2 hours in another machine room where the sound pressure level is 91.8 dB(A). In
the remaining period, he works in an office where the sound pressure level is around 66 dB(A).
What is the maximum value of the sound pressure level “x" if the noise exposure dosage of the
officer does not exceed the limit?
Note: In the following questions, unless otherwise specified, the air density and the speed of
sound (in air) are 1.2 kg/m³ and 344 m/s, respectively.

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