OCEAN DIVER KNOWLEDGE REVIEW OT6 WHAT IF?

OCEAN DIVER KNOWLEDGE REVIEW
OT6 WHAT IF?

Multiple-choice exercise

Inadequate elimination of nitrogen during ascent can result in _____. See Student Workbook p66.
1. Nitrogen narcosis
2. Oxygen toxicity
3. Hypercapnia
4. DCI
5. Nitrogen poisoning
The symptoms of DCI may be due to _____. Tick all that apply. See Student Workbook pp66-67
1. gas bubbles in the tissues
2. gas bubbles in the blood
3. physical damage to the lungs
4. too much oxygen dissolved in the blood
5. too much carbon monoxide dissolved in the blood
The treatment for nitrogen narcosis is to _____. See Student Workbook p69
1. descend
2. ascend
3. breathe oxygen at the surface
4. go to a recompression chamber
5. take a single aspirin
First aid for DCI requires ______. See Student Workbook p68.
1. a twin set
2. hot drinks
3. a pony cylinder
4. an oxygen administration kit
You can minimise the risk of oxygen toxicity by ______. Tick all that apply. See Student Workbook p69
1. never exceeding your MOD
2. using an AS
3. breathing oxygen at the surface
4. buddy diving
5. analysing your Nitrox mix before use
You can minimise the risk of DCI by ______. Tick all that apply. See Student Workbook p66.
1. never exceeding your MOD
2. using tables or computers to plan dives
3. following good dive practice
4. using an AS
5. using a suitable Nitrox mix
Which of the following describes the ideas behind the Incident Pit? See Student Workbook pp71-72.
1. Deep diving is very dangerous
2. Build open water experience progressively
3. Resolving an underwater problem early prevents more serious
  consequences
4. Don’t bother with minor problems, they often sort themselves out
5. Expose yourself to situations where you will panic, so that you can learn to control it
An AS takes the form of _______ See Student Workbook pp72-73.
1. Your buddy's octopus rig
2. A pony cylinder with regulator
3. Twin regulators on a single cylinder
4. Twin cylinders with separate regulators
5. Any of the above
On reaching the surface after an AS ascent the rescuer’s and casualty’s BCs should be ________ See Student Workbook p73
1. removed
2. deflated
3. inflated
4. left alone
If an ‘out of gas’ situation occurs you should ______ . See Student Workbook p73
1. continue the dive using an AS
2. make a controlled AS ascent
3. make a free ascent
4. perform a controlled buoyant lift
5. ditch the casualty’s weights underwater
After you have successfully brought a casualty to the surface and made them buoyant ___________. See Student Workbook pp74-75
1. Give a distress signal
2. Tow the casualty to the shore as quickly as possible
3. Wait for the Dive Manager to organise a rescue
4. Swim to safety and leave others to attend to the casualty
5. Swim ashore and phone the emergency services
Accidents while diving are best prevented by ................ See Student Workbook p72
1. Dive planning and anticipating conditions
2. Training, practise and experience
3. Diving within your capabilities
4. Monitoring yourself and buddy during a dive
5. All of the above