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

Derive the correction factor formula for conical nozzle i=-(1+ cosa) and calculate the nozzle angle correction factor for a nozzle whose divergence hal-fangle is 13 (hint: assume that all the mass flow originates at the apex of the cone.

Answers: 3

Answer

Engineering, 04.07.2019 18:20

Aquick transition of the operating speed of a shaft from its critical speed will whirl amplitude. (a) increase (b) limit (c) not affect (d) zero

Answers: 2

Answer

Engineering, 06.07.2019 04:10

Aheat pump with refrigerant-134a as the working fluid is used to keep a space at 25°c by absorbing heat from geothermal water that enters the evaporator at 500c at a rate of 0.065 kg/s and leaves at 40°c. the refrigerant enters the evaporator at 20°c with a quality of 23 percent and leaves at the inlet pressure as saturated vapor. the refrigerant loses 300 w of heat to the surroundings as it flows through the compressor and the refrigerant leaves the compressor at 1.4 mpa at the same entropy as the inlet. determine: (a) the degrees of subcooling of the refrigerant in the condenser, b)-the mass flow rate of the refrigerant . (c) the heating load and the cop of the pump, and d)-the theoretical minimum power input to the compressor for the same heating load.

Answers: 3

Answer

Engineering, 06.07.2019 04:30

List five instruments for angular measurement and explain one of them witlh appropriate diagram(s)

Answers: 1

Answer

You know the right answer?

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

Questions