What are some of the safety signs that are used in work sites? For example, mandatory signs.

1. Hard hat area - Indicates that hard hats must be worn in this area.
2. Eye protection required - Indicates that safety glasses or goggles must be worn in this area.
3. Ear protection required - Indicates that ear plugs or earmuffs must be worn in this area.
4. Foot protection required - Indicates that steel-toed boots or other protective footwear must be worn in this area.
5. High voltage - Indicates the presence of high voltage electrical equipment or lines.
6. No smoking - Indicates that smoking is prohibited in this area due to fire hazards.
7. No entry - Indicates that unauthorized personnel are not allowed in this area.
8. Danger - Indicates a hazardous situation that could result in serious injury or death.
9. Caution - Indicates a potential hazard that could result in minor to moderate injury.
10. Fire extinguisher - Indicates the location of fire extinguishers in case of a fire emergency.

Mandatory Signs:

- Wear Hearing Protection: Circular blue sign with earmuffs and a white border.
- Wear Eye Protection: Circular blue sign with safety glasses and a white border.
- Wear Hand Protection: Circular blue sign with gloves and a white border.
- Wear Foot Protection: Circular blue sign with safety shoes and a white border.
- Wear Head Protection: Circular blue sign with a hard hat and a white border.
- Wear Respirator: Circular blue sign with a respirator and a white border.
- Wear Protective Clothing: Circular blue sign with a coverall and a white border.
- Wash Hands: Circular blue sign with hands being washed and a white border.
- Use Caution: Triangular blue sign with an exclamation mark and a white border.
- Do Not Enter: Circular red sign with white text.

Prohibition Signs:

- No Smoking: Circular red sign with a cigarette inside a crossed-out circle.
- No Eating or Drinking: Circular red sign with a crossed-out glass and plate.
- No Open Flames: Circular red sign with a crossed-out flame.
- No Cell Phones: Circular red sign with a crossed-out cell phone.
- No Parking: Rectangular red sign with white text.
- Do Not Operate: Circular red sign with a crossed-out operating lever.
- Do Not Touch: Circular red sign with a crossed-out hand.

Warning Signs:

- Danger: Triangular yellow sign with a black border and black exclamation mark.
- Caution: Triangular yellow sign with a black border and black exclamation mark.
- Warning: Triangular yellow sign with a black border.
- Slippery When Wet: Triangular yellow sign with a black person slipping.
- Electrical Hazard: Triangular yellow sign with a black lightning bolt.
- Radiation Hazard: Triangular yellow sign with a black trefoil and three black petals.
- Biological Hazard: Triangular yellow sign with a black biohazard symbol.

Informational Signs:

- Emergency Exit: Rectangular green sign with white text.
- First Aid: Rectangular green sign with a white cross.
- Fire Extinguisher: Rectangular green sign with a white fire extinguisher.
- Eye Wash Station: Rectangular green sign with a white eye wash bottle.
- Safety Shower: Rectangular green sign with a white shower head.
- Restricted Area: Rectangular yellow sign with black text.
- Hazard Area: Rectangular yellow sign with black text.