Special Site Hazards
Why may a confined space be dangerous to work in?
There may not be sufficient working space
Air in the space may be unbreathable due to poisonous gas
Temperature and poor ventilation may affect the worker
All of the hazards mentioned
What must be considered first when planning to carry out work in a confined space?
Has the job been priced properly
Have the correct tools been arranged
Has sufficient manpower been allocated
Can the work be done from the outside
When working in a confined space, such as a sewer, what danger may occur?
Getting wet through
Boredom
Not enough time for the job to be done
Build up of harmful gases
To determine the safety of the atmosphere in an excavation, which of the following is essential?
Sniffing the atmosphere after entry
Using a gas detector
Only entering for a short period to enable a quick escape
Looking for toxic gases
Before entering an excavation to start work, it must first be:
Inspected by a competent person
Covered over and left overnight
Filled with water then drained
Inspected by the HSE
What is the purpose of using a 'permit to work' system?
To ensure the job is carried out by the quickest method
To help ensure a safe system of work
To ensure that the client will pay for the work
To enable tools and equipment to be properly checked before the commencement of work
Why may young people be more at risk on site?
There is no specific legislation applying to them
They are usually left to work alone to gain experiene
There is no requirement to provide PPE to young people
They are inexperienced and may not recognise danger
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?
Just get on and do the job, it will probably be alright
Plan to carry out the job in short bursts
Do not enter the manhole until a rescue plan and rescue equipment are in place
Ask your mate to stand-by at the top of the manhole with a length of rope
You have to enter a manhole in which you know there are toxic gases. You have not been provided with any Respiratory Protective Equipment (RPE). What should you do?
Tell your supervisor that you will need RPE, and if necessary, training in confined space working
Sniff the atmosphere in the manhole to see if you can smell harmful gases
Look into the manhole to see if you can see any harmful gases
Just get on with the job, and accept the risks
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
A Cable Avoidance Tool (C.A.T.) and a 'Genny' (generator) can be used successfully to located underground cables by whom:
Anyone
A competent person after training
Any electricity company employee
The site foreman
When exposing underground power cables, which method of excavation should you use?
A 360 degree excavator with rubber tyres
A pickaxe
Hand digging
A kango hammer
When do special precautions need to be taken when working near overhead electric power lines?
Only if cranes etc. are being used
Only if someone could touch a line with their bare hands
Only if plant has to pass under the lines
Whenever work areas will be near or beneath the lines
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 quickly
You have to walk across a site several times a day, but have to dodge a lot of site traffic. The first thing you should do is:
Have word with the drivers
Walk around the edges of the site to keep out of the way
Tell your supervisor about the danger
Jump on the back of a vehicle if you can, its safer than walking
A mobile plant operator can let you ride in the machine:
If you have a long way to go
If it is raining
If it is designed to carry passengers
At any time
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