According to IMO guidelines, how much oxygen, by volume, is required for entry into an enclosed space?
According to IMO guidelines, if the atmosphere in an enclosed space is suspect, then …
Entry should only be made for essential operation, further testing, safety of life or safety of the ship.
Entry can only be made provided there is no toxic gas.
Entry can only be made provided there is no flammable gas.
No entry is allowed under any circumstances.
According to the IMO, which one of the following options best completes the following statement an enclosed space is one which might have any of the following characteristics:
… has only one opening and is bounded by steel bulkheads and deckheads.
… limited openings for entry and exit, inadequate ventilation or is not designed for continuous worker occupancy.
… is kept locked, with a warning sign posted.
… is not open to the atmosphere or is used as a store.
How can the presence of toxic gasses in an enclosed space be detected?
Test for oxygen. Provided there is enough oxygen, and no bad smells, the space should be safe.
Test for flammable gasses. If there are no flammable gasses and no bad smells, the space should be safe.
Use a personal monitor, calibrated for carbon monoxide or hydrogen sulphide.
Selective tests have to be carried out with knowledge of which toxic products have previously been in the space.
If the ventilation fails whilst you are working in an enclosed space, what should you do?
Ensure someone is regularly checking the atmosphere.
Carry on working as long as your gas alarm does not sound.
Report the ventilation failure, but carry on working if the atmosphere is still safe.
Leave the space immediately and ensure everyone else does the same.
If there is any doubt about pockets of flammable gas remaining in an enclosed space, what particular precaution should be taken?
Personal gas monitors must be used by all members of the team.
Only 24 Volt hand lamps should be used.
Portable lights and other electrical equipment should be of a type approved for use in an explosive atmosphere.
No more than one person should enter the space at any time.
If there is any doubt about pockets of gas or toxic cargo remains in an enclosed space, what precaution should be taken?
The time each person can spend in the space should be limited.
Personal gas monitors must be used.
Breathing apparatus must be worn at all times.
If there is any doubt about toxic vapours remaining in an enclosed space, what particular additional precaution should be taken?
Personal gas monitors must be used by all members of the team.
Breathing apparatus and suitable protective clothing should be worn.
The time each person can spend in the space should be limited.
Ventilation should be stopped to avoid spreading vapours.
If you are given a respirator to wear in an enclosed space, but don’t like wearing it whilst working, what can you do?
If it is part of the agreed safety procedures you must continue to wear it.
Take it off, and if there are no bad smells then it will be okay.
If your personal monitor says that the atmosphere is okay then you can take it off.
Take it off now and again for short periods.
If you are working as part of a team in an enclosed space and one of your colleagues starts acting as though they were drunk what should happen?
The person who appears drunk should be reported.
The person who appears drunk should be told to leave the space.
All the team should leave the space immediately and seek medical attention.
The person who appears drunk should be given plenty of water.
If you are working in an enclosed space and the attendant instructs you to leave, what should you do?
Leave the space immediately, and ensure the rest of the team does the same.
Check your personal gas monitor.
Ask why work is being stopped and contact the officer of the watch.
Ask for an SCBA to be brought in so that you can continue working.
Once an emergency team has been prepared for an enclosed space rescue, which one of these options is their first priority in most situations?
To find out the cause of the incident.
To supply the casualty with clean air and then get them out of the space and into fresh air.
To treat all of the casualty’s injuries at the scene of the incident.
To see if they can get the casualty sufficiently recovered to avoid having to lift them out.
Stagnant water, some sewage systems and some oil cargoes can all be the source for a gas which is both flammable and toxic. This gas is:
Under what circumstances should someone acting as the attendant at the entrance to an enclosed space go into that space?
If the persons in the space get into any difficulty.
If they can do so and remain in sight of the entrance.
Only when relieved of that duty and as part of an organised rescue team.
If called for by the persons in that space.
Vehicle and diesel engine exhausts can be the source for toxic gas. This gas is:
What is the main role of the attendant outside an enclosed space?
To close the entrance once the team have entered the space and open it up again once they are ready to leave.
To remain at the entrance to the space, keep in contact with those in the space, and raise the alarm if there are any signs of danger.
To be available to immediately go in and get anyone out if they become ill.
To pass tools or cleaning materials down into the space and help remove any cargo residues.
What is the maximum level of flammable gas allowed for safe entry into an enclosed space?
50% of the lower flammable limit.
10% of the lower flammable limit.
1% of the lower flammable limit.
What percentage of the Occupational Exposure Limit (OEL) do the IMO say is safe before seafarers enter an enclosed space?
What should you do if you start feeling tired, or ill, feel your eyes watering, or start developing a headache in an enclosed space?
Mention it to a colleague, just in case.
Leave the space immediately, report the matter and seek medical attention.
Try working on and see if you get better.
Leave the space, have a rest and some fresh air and then return.
When rusting of ship’s steelwork occurs, which one of the following is the main effect on the air inside a ballast tank or cargo tank?
The oxygen content of the air decreases.
The air develops a bad smell.
Carbon dioxide is given off by the rusting process.
The oxygen content of the air increases.
When should an Emergency Escape Breathing Device (EEBD) be used in an enclosed space?
It can be worn for short periods of work when toxic gasses are present.
It can be worn by a rescuer in an emergency.
Only as a means of escape when an unexpected hazard occurs.
It can be worn for short periods of work when there is a lack of oxygen.
Which one of the following options best completes the following statement? Onboard ship, an enclosed space is any space which:
… has four walls and a ceiling.
… is not open to the atmosphere.
… has limited ventilation or could contain toxic or flammable vapours.
… has a danger sign at the entrance.
Which one of the following options correctly completes the following statement? Before entry into any space which has limited ventilation or might contain toxic or flammable gasses:
… the ventilation fan should be run for at least two hours.
… you should let someone know where you are going.
… shipboard procedures, including risk assessment by a competent person, should be followed.
… the door should be left open for at least an hour.
Which one of the following statements best describes how enclosed space rescues should be organised?
As speed is vital, the person nearest the space should attempt a quick rescue where possible.
All rescues should be by a team following pre-arranged procedures.
Senior officers should act on their own initiative.
If the casualties can be seen from the entrance to the space then the attendant should rescue them.
Which one of the following statements best describes the term “Occupational Exposure Limit” (OEL)?
It is a guide to safe exposure to toxic products, based only on the amount of a given substance present.
It is a guide to safe exposure to harmful ultra violet (UV) rays when working on deck.
It is a guide to safe exposure to toxic products, based on the amount of a given substance and the time in contact it.
It is a guide to safe exposure to toxic products, based only on the time in contact with the substance.
Which one of the following statements best describes the use of a safety harness when going down into an enclosed space?
They need not be worn, provided one is available onboard ship.
They need not be worn, provided they are available in the emergency headquarters.
They should not be worn, as they are only for rescue and may get caught on obstructions.
They should be worn whenever possible to save time in the event of an emergency.
Which one of the following statements best describes why a ship’s chain locker should be classed as an enclosed space?
Because access may be restricted.
Because it would be dangerous to be in there during anchoring operations.
Because there is limited ventilation and rusting may use up the oxygen in the space.
Because it may be below the waterline.
Which one of the following statements best describes why a ship’s sewage tank should be classed as an enclosed space?
Because it is a covered space.
Because it might be quite small and difficult to move around in.
Because it is inside the engine room.
Because it is likely to contain toxic or flammable gasses.
Which one of these statements best describes the effects some cargoes can have on the atmosphere in a cargo space?
The atmosphere can develop a bad smell.
No effect, because any harmful cargoes are sealed.
They can use up or displace oxygen and give off toxic or flammable gasses.
Very little effect, since the spaces are ventilated.
Who can take part in enclosed space entries, rescues or act as an attendant at the entrance to an enclosed space?
Anyone who has been trained how to wear SCBA.
Only those who have had specific enclosed space training and have taken part in enclosed space rescue training drills.
Anyone who has had an onboard safety briefing for the work.
Anyone holding a certificate of competency.
