Occupational Exposure Limits Quiz

Which is incorrect about Occupational exposure limits (OELs)?

• generally refer to mixtures of substances

• may change from time to time

• do not represent a fine demarcation between good and bad practice

• are based on the current best available information

Asbestos are airborne contaminants which are quantified in

• 
  weight of the substance in parts per billion (ppb)

• number of fibers per mL of air (f/mL)

• atmospheric concentration in parts per million (ppm)

• milligrams of substance per cubic metre of air (mg/m-3).

Effects of the constituents are from the same health effects- this describes

• additive

• antagonistic

• potentiation

• synergistic

OELs of gases X,Y and Z are not to be used for

• Workers handling chemicals X, Y and Z

• Manufacturer of the chemicals that release gases X,Y and Z

• Residents affected in a chemical emergency

• Local formulator based in Malaysia

The data for setting hygiene standards includes the use of the following, EXCEPT

• Statistical study of disease patterns in groups of individuals

• Tests conducted on animals

  
  

• Toxicological studies on human

• Human poisoning cases