IGC 2 additional important questions
1. Explain the meaning of the term 'workplace exposure limit'. (2)
The term "workplace exposure limit" (WEL) is concerned with concentrations of hazardous substances in the air that people breathe averaged over a specified period of time and referred to as a time weighted average.
2. Acute injuries normally lead to sickness leave from work and a period of rest during which time the damage heals.
3. Chronic injuries build up over a long period of time and are usually irreversible, producing illnesses such as arthritic and spinal disorders.
4. Acute effects are of short duration and appear fairly rapidly, usually during or after a single or short-term exposure to a hazardous substance. Such effects may be severe and require hospital treatment but are usually reversible. Examples include asthma-type attacks, nausea and fainting.
5. Chronic effects develop over a period of time which may extend to many years.
Chronic health effects are produced from prolonged or repeated exposures to hazardous substances resulting in a gradual, latent and often irreversible illness, which may remain undiagnosed for many years.
6. Electricity is the flow or movement of electrons through a substance which allows the transfer of electrical energy from one position to another.
7. Health is defined by the WHO as:
'a state of complete physical, mental and social well being and not merely the absence of disease or infirmity'.
8. Workplace exposure limits
The WELs are subject to time-weighted averaging. There are two such Timeweighted Averages (TWA): the long-term exposure limit (LTEL) or 8-hour reference period and the short-term exposure limit (STEL) or 15-minute reference period.
9. Material safety data sheets are very useful source of information for hazard identification and associated advice.
10. Ergonomics is the study of the interaction between workers and their work. It is concerned with the work organization, process and design of the workplace and work methods.
The common
The term "workplace exposure limit" (WEL) is concerned with concentrations of hazardous substances in the air that people breathe averaged over a specified period of time and referred to as a time weighted average.
2. Acute injuries normally lead to sickness leave from work and a period of rest during which time the damage heals.
3. Chronic injuries build up over a long period of time and are usually irreversible, producing illnesses such as arthritic and spinal disorders.
4. Acute effects are of short duration and appear fairly rapidly, usually during or after a single or short-term exposure to a hazardous substance. Such effects may be severe and require hospital treatment but are usually reversible. Examples include asthma-type attacks, nausea and fainting.
5. Chronic effects develop over a period of time which may extend to many years.
Chronic health effects are produced from prolonged or repeated exposures to hazardous substances resulting in a gradual, latent and often irreversible illness, which may remain undiagnosed for many years.
6. Electricity is the flow or movement of electrons through a substance which allows the transfer of electrical energy from one position to another.
7. Health is defined by the WHO as:
'a state of complete physical, mental and social well being and not merely the absence of disease or infirmity'.
8. Workplace exposure limits
The WELs are subject to time-weighted averaging. There are two such Timeweighted Averages (TWA): the long-term exposure limit (LTEL) or 8-hour reference period and the short-term exposure limit (STEL) or 15-minute reference period.
9. Material safety data sheets are very useful source of information for hazard identification and associated advice.
10. Ergonomics is the study of the interaction between workers and their work. It is concerned with the work organization, process and design of the workplace and work methods.
The common