Question1. The standard service illuminance for specific work activities is given in lux. What units are used in calculating lux and what instrument could be used to appraise the lighting level in a workplace?
Question2. Name five components of a typical local exhaust ventilation system and their respective functions.
Question3. What are the units commonly used in occupational exposure limits for quantifying the concentration of dust particles, vapours or gases and fibres?
Question4. What does LD 50 mean in Industrial Toxicology?
Question5. Give a brief outline of a Hearing Conservation Programme.
Question6. Why is it important to maintain good standards of Indoor Air Quality in modern offices? Briefly elaborate on the potential air pollutants encountered in such working environments.
Question7. What is the health problems associated with the use of cooling towers in air-conditioning systems in buildings? Outline the control measures that could be implemented to minimise such risks.
Question8. Explain what is meant by the term Threshold Limit Values (TLVs). Describe briefly the different TLVs used by Industrial Hygienists.
Question9. Outline the strengths and weaknesses of these workplace exposure limits and illustrate how they may best be used as part of an overall control strategy for hazardous substances.