8.3 Safe working in confined spaces

The main dangers in a confined space include:

• 1 Loud music
• 2 Lack of oxygen and toxic atmospheres
• 3 Heavy rainfall only
• 4 Too much natural light

Before entering a confined space you should:

• 1 Go in quickly to check
• 2 Use a permit to work and test the atmosphere
• 3 Enter alone without telling anyone
• 4 Remove all communication devices

A rescue plan for a confined space should be:

• 1 Based on untrained volunteers
• 2 Prepared in advance with trained rescuers outside
• 3 Avoided to save time
• 4 Decided after an incident

A confined space is one that:

• 1 Is any small room
• 2 Is always underground
• 3 Is always a tank
• 4 Is large enough to enter, not designed for continuous occupation and has a foreseeable risk

Which of these is a confined space?

• 1 A sewer
• 2 A car park
• 3 A canteen
• 4 A large open warehouse

A hazard in a confined space is:

• 1 Open ventilation always
• 2 Too much light
• 3 Easy exit
• 4 Lack of oxygen

Engulfment means:

• 1 Hearing loss
• 2 Radiation burns
• 3 Being surrounded and trapped by a liquid or solid
• 4 Heat stroke

Which of these is part of a safe system of work for confined spaces?

• 1 Ignoring rescue
• 2 Entering alone with no contact
• 3 Entering without testing
• 4 A permit to work

Testing the atmosphere before entry is to check:

• 1 The light level
• 2 The number of workers
• 3 Oxygen level and the presence of toxic or flammable gas
• 4 The noise level

Why do many deaths occur among would-be rescuers?

• 1 They are always too slow
• 2 They enter without the right equipment or training
• 3 They are always too late
• 4 They have time to prepare

A rescue plan should have:

• 1 Rescuers inside the space only
• 2 No equipment
• 3 Equipment and trained rescuers outside the space
• 4 Untrained volunteers

Isolation of services before entry means:

• 1 Opening the pipes
• 2 Disconnecting or blocking pipes, power and other hazards
• 3 Removing the signs
• 4 Switching on machines

Which action is best before entry if the work can be done another way?

• 1 Enter without a permit
• 2 Avoid entry if possible
• 3 Enter alone
• 4 Enter anyway

Communication for a person inside a confined space is needed to:

• 1 Replace the permit
• 2 Call for help and keep contact with the outside
• 3 Entertain them
• 4 Reduce ventilation

Restricted entry and exit makes confined spaces dangerous because:

• 1 They are always dry
• 2 Escape and rescue are difficult
• 3 They are always cold
• 4 They are always quiet