QUESTION 1
The noise level at the worker location when a number of machines are operating has been measured as 91 dBA. The noise level from just one of these machines is known to be 89 dBA and management have suggested that this machine could be placed in a separate area and well away from the worker.
(a) Briefly discuss five possible health effects of noise at the workplace.
(b) If the 89 dBA machine is placed in a separate area, what would be the noise level at the worker from the operation of the remaining machines?
(c) Given the permissible limit is 85 dBA. Specify whether a hearing conservation programme would still be needed. If yes, briefly discuss how you would make an assessment of the workplace noise.
QUESTION 2
During an OH&S meeting, the health aspects of exposure to ionising radiation and the control of any external and internal radiation hazards were discussed.
(a) What do you understand by the term external and internal radiation? List down the health effects associated with each of them
(b) How would you go about measuring the level of radiation?
(c) Discuss the approaches you would undertake to control exposure to radiation
(d) What measures you would implement to ensure health surveillance of the workers?
QUESTION 4
During an occupational hygiene assessment/survey, you identify a risk to health. Describe briefly what control measures you need to consider and implement specifying clearly your order of desirability