Working in Site Excavations

What is the maximum depth of a trench before it requires safety measure being put in place?

• 1.30 m
• 1.25 m
• 1.20 m
• 1.26 m

Which of the below options is a recognized method that can be used to make working in deeper trenches safer?

• Buttered Sides
• Branched Sides
• Shored sides
• Planed Sides

Can Ladders be used to access trenches for working?

• Yes
• No

What distance from the side of the trench does the spoil need to be placed as a minimum?

• 3.0 m
• 1.5 m
• 0.5 m
• 1.0 m

How are ladders to be secured when working in a trench?

• Secured against the other side of the trench
• Secured by a large weight to stop the bottom from sliding out when in use
• Secured to the trench supports
• Secured by ground pegs

What size of barrier is required to be erected around a trench and what distance from the edge?

• 2.2 m high and at least 1.2 m from the edge
• 2.5 m high and at least 1.5 m from the edge
• 2.0 m high and at least 1.0 m from the edge
• 2.3 m high and at least 1.3 m from the edge

What should be fitted to the bottom of the trench barrier?

• Kick board
• Toe board
• Foot board
• Shin board

When using propane in a trench, what precautions must be carried out to ensure the safe working of the individuals?

• Site / Company responsible for the site must use industrial ducting to forcibly vent the trench
• Site / Company responsible for the site must prevent use of propane in trenches, as it is not allowed
• Site / Company responsible for the site must provide a fire marshal to watch for fires and raise the firm alarm
• Site / Company responsible for the site must limit the size of the propane bottles used

What is considered the most important piece of PPE to be worn when working in a trench?

• Hi Viz vest / jacket and hard Hat
• Hi Vis Vest / Jacket and safety boots
• Hi Viz vest / jacket and ear defenders
• Hi Viz vest / jacket and safety gloves

Select the safety risks when working in confined spaces (including trenches)?

• Lack of oxygen
• Poisonous gasses or fumes
• Liquids or solids suddenly filling the space you are working in
• Fire or explosions