Engineering, 10.03.2020 17:00 micvar9646

You have been asked to evaluate worker exposure to benzene in a chemical processing facility. You would like to use a passive / diffusive sampler since you find the advantages of this approach very appealing. You have obtained the sampling rates for the specific brand of monitor that your company uses (see attached page) and have looked up the sampling rate for benzene based on the Full NIOSH validation (research report 1312) a. Assuming that you would like to be able to detect an airborne concentration equal to 1/10th of the current OSHA PEL for benzene, what is the minimum amount of time that you would need to place the monitor on the worker?b. Would you be able to use this monitor to evaluate exposure based on the OSHA STEL (15 min TWA) for benzene - explain/ support your answer with calculations c What are the advantages and disadvantages of diffusive samplers for workplace exposure monitoring?

Answers: 2

Show answers

Another question on Engineering

Engineering, 04.07.2019 18:20

Find the kinematic pressure of 160kpa. for air, r-287 j/ kg k. and hair al viscosity of air at a temperature of 50°c and an absolute (10 points) (b) find the dynamic viscosity of air at 110 °c. sutherland constant for air is 111k

Answers: 3

Answer

Engineering, 04.07.2019 18:20

For each of the following process: a) sketch the p-v diagram, b)sketch t-s diagram, c) sketch t-v diagram, d) sketch the boundary work on one of the diagrams (a, b or c) and e) sketch the reversible heat transfer on one of the diagrams (a, b or c): 1- isobaric process from compressed liquid to superheated vapor 2- isothermal process from compressed liquid to superheated vapor 3- isentropic process from compressed liquid to superheated vapor

Answers: 3

Answer

Engineering, 04.07.2019 18:20

Water vapor initially at 10 bar and 400 °c is contained within a piston-cylinder assembly. the water lost heat to the surrounding according to isochoric (iso-volumetric) process until its temperature is 150 °c. the water is then condensed isothermally to saturated liquid. for the water as a system, calculate the work in kj/kg

Answers: 2

Answer

Engineering, 04.07.2019 19:10

Agas contained within a piston-cylinder assembly e end nation about same energy states, 1 and 2, where pi 10 bar, v undergoes two processes, a and b, between the sam 0.1 m3, ui-400 kj and p2 1 bar, v2 1.0 m2, u2 200 kj: process a: process from 1 to 2 during which the pressure- volume relation is pv constant process b: constant-volume process from state 1 to a pressure of 2 bar, followed by a linear pressure-volume process to +20 0 state 2 kinetic and potential energy effects can be ignored. for each of the processes a and b, (a) sketch the process on p-v coordinates, (b) evaluate the work, in kj, and (c) evaluate process the heat transfer, in kj

Answers: 2

Answer

You know the right answer?

You have been asked to evaluate worker exposure to benzene in a chemical processing facility. You wo...

Questions