Assignment 2Format: Calculations and essay questionsValue: 20%Due date: 11 OctoberWord guide: 3000 word maximum for Q1Purpose:To assess your ability to: demonstrate a detailed understanding of the principles of measurement of the thermalenvironment, lighting and noise demonstrate an understanding of the key principles and basic concepts of occupational hygieneby considering the future challenges for the discipline of occupational hygiene demonstrate an understanding of the principles of ventilation and calculate adequate volumeflow rates determine whether noise levels in a particular situation are excessive_________________________________________________________________________1. Essay questionsA) Explain and discuss why the demands of the tasks undertaken in the workplace need tobe considered when conducting assessments of the thermal and visual environments.B) Explain and discuss the different reasons why it may be important to analyse thefrequency composition of a noise source.C) What are the challenges for occupational hygienists in the future in terms of changingworkplaces and workforces? Discuss.[Ensure that the points made in your essay are relevant to the key components ofoccupational hygiene practice]2. CalculationsA small printing business has introduced a new process which transfers designs onto fabric.An occupational hygienist is brought in to investigate whether the existing ventilation systemis adequate and whether additional noise controls are needed. Complete the followingcalculations:A) VentilationInks for the printing process contain 20% by volume of solvents. The mixture, by volume is:40% n-hexane, 20% methyl ethyl ketone (MEK), and 40% toluene. During the print run, ink isused up at the rate of 6 litres per hour. The air inlet hood has a face area of 0.20m2 and an airinlet velocity of 0.5 m/s.Is the air flow rate adequate for dilution of the flammable vapours released by the process?[Use a safety factor of 4 and a temperature of 20°C]Q’ = 22.4 (273 + T°C x SG x V x K x 102273 x 3600 x M x C x BComponent Specific Gravity(SG) Molecular Weight (M) LEL (%)n-hexane 0.66 86.17 1.18MEK 0.805 72.10 1.81toluene 0.866 92.13 1.27B) Noisei) An indoor fan with a sound power level of 94dB is to be installed at the centre of onewall of the room. As sound pressure levels vary according to the presence of reflectingsurfaces, what would the sound pressure level at 3 metres be?ii) Estimate the noise attenuation outdoors if the noise level at 40m from rooftopmachinery is 88dB in the 500Hz band and 94dB in the 4000 Hz band. What is the noiselevel in each band at a distance of 1000m?
- Assignment status: Already Solved By Our Experts
- (USA, AUS, UK & CA PhD. Writers)
- CLICK HERE TO GET A PROFESSIONAL WRITER TO WORK ON THIS PAPER AND OTHER SIMILAR PAPERS, GET A NON PLAGIARIZED PAPER FROM OUR EXPERTS