Additional important questions
Explain the meaning of the term workplace exposure limit’. (2) The term “workplace exposure limit” (WELL) Is concerned with concentrations of hazardous substances In the alarm 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. . 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. . 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 WELL are subject to time-weighted averaging.
There are two such Dimwitted Averages (TWA): the long-term exposure limit (LATE) or 8-hour reference period and the short-term exposure limit (STEEL) or 1 5-Emanuel 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 definitions of ergonomics, the ‘man-machine Interface’ or’ fitting the man to the machine. 1. The risk assessment of a DES work station (visual display unit – VOID) needs to consider the following factors: 8 marks. The height and adjustably of the monitor; the adjustably of the keyboard, the audibility of the mouse and the provision of wrist support; the stability and foot support; the effect of any lighting and window glare at the work station; the storage of materials around the work station; the safety of trailing cables, plugs and sockets; environmental issues – noise, heating, humidity and draughts (pull of air). 2. Identify the symptoms that the worker may experience due to vibration exposure. The symptoms include tingling, numbness and blanching of the fingers and swollen and painful Joints in addition to a reduction in dexterity, strength and sensory perception.