Hazardous activities.

5. A colourless and odourless gas contained in exhaust fumes which when breathed in, can kill(6,8)
7. Welsh word for 'utilities'
9. A word to describe the nature of fuel such as petrol and diesel, used in some powerd tools.
10. Term used to describe a tool powered by compressed air.
14. Term used to describe lifting equipment includes jacks, winches, chain hoists and cranes.
15. This is sometimes the only viable option, when a building reaches the end of its useful existence and has become fragile and unsafe.
16. Before staring any excavations, it is essential to attempt to ------ any utilities.
17. Separate routes or pavements should be provided for ----------- to keep them away from plant and machinery.

1. A term used to describe a machine that is either tracked or wheeled and used for clearing land, pushing soil, excavating or loading into trucks.
2. A designated -------- ----- should be provided when a padestrian route crosses a road on site(8,5)
3. Welsh word for 'Combustible'
4. Trenches that are more than 1.2 m or 4 feet deep need a safe means of egress, that must be fixed and secure, such as a stairway, ------ or ramps.
6. Another word for digging trenches for foundations, services etc.
8. There are many hazards involved in excavation work icluding coming into contact with underground ---------
11. A type of 'Control measure' used to keep vehicles and plant used in or around the site and work area away from the people on site.
12. Term to describe the safety precautions put in place on site to help prevent accidents happening(7,8)
13. Welsh word for 'isolate'