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1) The group of physical factors includes:
- moving machines and mechanisms; unprotected moving elements of
production equipment, defective products, workpieces, materials;

- Increased dust and air pollution in the work area;
- raised or decreased temperature of surfaces of equipment, materials; elevated
or lowered air temperature in the workplace;
- increased noise level, vibration, infrasound vibrations, ultrasound;
- increased or decreased barometric pressure in the working area and its abrupt
change;
- raised or lowered humidity of the air, its mobility, ionization of the air;
- increased level of the ionizing radiation in the work area;
- a dangerous level of voltage in the electrical circuit, which can lead to short-
circuited through the human body;
- increased level of static electricity, electromagnetic radiation;
- increased intensity of electric and magnetic fields;
- lack of or insufficient natural light; insufficient illumination of the working
area; increased brightness of light, low contrast; direct and reflected glare; increased
pulsation of the light flux;
- increased levels of ultraviolet and infrared radiation;
- sharp edges, roughness of surfaces of billets, tools and equipment;
- the location of the workplace at a considerable height relative to the ground
(floor);
- weightlessness.

2) The chemical hazardous and harmful industrial factors include chemical
substances that classified:
a) by the nature of the action on the human body
- generally toxic;
- irritants;
- sensitizing substances;
- carcinogenic;
- mutagenic;
- factors affecting the reproductive function.

b) by penetration into the human body:
- respiratory tract;
- gastrointestinal tract;
- through the skin and mucous membranes.

3) The group of biological factors includes the objects that cause the disease
are:
- pathogenic microorganisms (bacteria, viruses, rickettsiae, spirochetes, fungi,
protozoa) and products of their vital functions.

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