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Why may a confined space be dangerous to work in?
All of the hazards mentioned
Temperature and poor ventilation may affect the worker
Air in the space may be unbreathable due to poisonous gas
There may not be sufficient working space
What must be considered first when planning to carry out work in a confined space?
Can the work be done from the outside
Has sufficient manpower been allocated
Have the correct tools been arranged
Has the job been priced properly
When working in a confined space, such as a sewer, what danger may occur?
Not enough time for the job to be done
Build up of harmful gases
Getting wet through
To determine the safety of the atmosphere in an excavation, which of the following is essential
Only entering for a short period to enable a quick escape
Looking for toxic gases
Using a gas detector
Sniffing the atmosphere after entry
Before entering an excavation to start work, it must first be:
filled with water then drained
inspected by the HSE
covered over and left overnight
inspected by a competent person
You have to enter a manhole in which you know there are toxic gases. You have all the PPE but there does not appear to be a rescue plan in place. What should you do?
Ask your mate to stand-by at the top of the manhole with a length of rope
Do not enter the manhole until a rescue plan and rescue equipment are in place
Plan to carry out the job in short bursts
Just get on and do the job, it will probably be alright
While digging a trench, you uncover a length of yellow marker tape at a depth of about 150mm. What does the presence of the marker tape mean?
The area has a high water-table and precautions must be taken to prevent an in-rush of water
There is a buried electrical cable and further excavation must be carried out with care
There is contaminated soil below the level of the marker tape and all excavation must stop
The excavation has reached a depth where the sides must now be supported
When working alone:
Make sure someone responsible knows where you are
You can do away with protective equipment
Don’t bother anyone if you have a problem, always sort it out yourself
Wear headphones, it will make the day go more quickly
If you are planning to work I a confined space, what is the first question that should be asked
Can the work be performed from the outside?
Does the site require temporary lights
How many workers are required for the job
What does the confined space contain