QUESTION 1
(a) Name the two main types of industrial ventilation used to control air contaminants in a work environment
(b) Under what conditions would each system be used and what specific actions are required to overcome their respective shortcomings?
QUESTION 2
a) Identify the type of pathogenic agent that causes the Legionnaires' disease and explain how it is able to enter the body and cause the illness
b) Briefly describe an occupational situation where there is a risk of contracting the disease and describe precautionary measures that should be taken to reduce the risk
QUESTION 3
a) Define a confined space and give some examples of such spaces
b) Name two main health hazards present in such place of work?
c) Outline the essential elements to be included in the preparation of a safe system of work