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What is the main hazard when working in trenches?
Noise exposure
Ground collapse
Sunburn
At what depth should a trench typically be supported or battered?
3 metres
0.5 metres
1.2 metres
What is “battering” in excavation work?
Using heavy machinery
Sloping the sides of an excavation
Compacting soil
Who is responsible for ensuring excavations are safe?
The responsible person (supervisor/employer)
Only the workers
The client only
What should be done before excavation begins?
Dig an inspection trench
Check for underground services
Order materials
What is the purpose of trench support systems?
To speed up work
To reduce noise
To prevent collapse
How often should excavations be inspected?
Once a week
At the start of every shift and after changes
Only after an accident
What should be used to enter and exit a trench safely?
Jumping in
Rope only
A ladder or safe access
What is a common sign of potential trench collapse?
Cracks in the ground
Dry soil
Sunny weather
What should you do if water starts collecting in a trench?
Ignore it
Continue working
Stop work and assess risk
Where should excavated material (spoil) be placed?
At the edge of the trench
At least 0.5 metres away from the edge
Inside the trench
What should be done if a trench shows signs of instability?
Leave immediately and report
Keep working carefully
Take photos only
Excavation & Trenching Tag
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Pass Excavation & Trenching
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