36 Questions
What is the term used to describe unwanted or unpleasant sound?
Noise
What is the term used to describe the distance between the successive peaks of sound waves?
Wavelength
What is the term used to describe the speed at which sound waves propagate through the medium?
Velocity
What is the term used to describe the rate at which sound waves pass a given point?
Frequency
What is the term used to describe the magnitude of sound waves?
Amplitude
What is the result of pressure changes in a medium due to a vibrating object?
Sound waves
What is the primary factor influencing risk in a given situation?
The nature of the situation
What is the mathematical relationship between risk, hazard, and exposure?
R ∝ H × E
What would be the result of replacing a hazardous material with a non-hazardous one?
The risk would be eliminated and exposure would not need to be controlled
Who is credited with the quote 'All substances are poisons; there is none which is not a poison'?
Paracelsus
What is the earliest recorded observation of an occupational disease attributed to?
Hippocrates
Why were mercury mines considered too unhealthy for Roman citizens?
Because they were contaminated by mercury vapor
What was the primary focus of Georgius Agricola's detailed study?
The economic benefits of gold-and silver-mining operations
In what century did the Roman scholar Pliny describe mercury poisoning as a disease of slaves?
1st century BC
What is the minimum sound pressure level in pascals that can be perceived by the human ear?
0.0002
What is the sound pressure level in decibels of an office environment?
40-60
What is the name of the membrane that vibrates when sound waves enter the outer ear?
Tympanic membrane
What is the name of the structure that sends nerve impulses to the brain?
Organ of Corti
What is the health effect of prolonged exposure to loud noises?
All of the above
What is the maximum sound pressure level in pascals that can be tolerated by the human ear without causing pain?
200
What is the term for the process by which the ear transforms sound vibrations into nerve impulses?
Hearing
What is the name of the window in the cochlea where the stapes bone transmits sound vibrations?
Oval window
What is the primary focus of hazard identification by work analysis?
Identifying occupations involved and the work people carry out
What type of work activities is the work analysis method better suited for?
Work activities with a considerable degree of scope for the worker to decide how the task is carried out
What is a major limitation of the work analysis approach?
It does not identify hazards that are not part of someone's work
What is the first step in the process of hazard identification by work analysis?
Identify all the tasks people carry out
What is the primary focus of hazard identification by process?
Identifying processes involved on a worksite and the hazards at each step
What is used to build up a profile of hazards and the occupations and tasks they apply to?
Information derived from task analysis
What is the second step in the process of hazard identification by work analysis?
Work out the steps or stages involved in doing the task
What type of work is hazard identification by work analysis applicable to?
Construction work and forestry operations
What is the range of wavelengths of microwaves?
1mm to 30cm
What is a potential health effect of long-term exposure to microwaves?
Cancer
What is the primary source of concern for Extremely Low Frequency Fields (ELF)?
Power lines, TV, and radio transmitters
What is the defining characteristic of ionizing radiation?
Ability to produce ions
What are the primary types of ionizing radiation?
Alpha, beta, gamma, and x-rays
What can be a source of alpha and beta particles and gamma rays?
Both natural and technologically produced sources
Learn about risk as a function of consequence and likelihood, including exposure and its effects on injury or disease.
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