1. Which one of the following air spaces is used to assist with buoyancy?
Intestines, Lungs, Sinuses, Middle ear,
2. Which of the following does not cause hypoxia?
Anaemia, Nitrogen narcosis, Lung failure, Severe haemorrage,
3. What is the Valsalva maneuver?
A form or artificial ventilation, Squeezing the chest to unblock the windpipe, Squeezing the nose and blowing to equalise the ears, In water recompression,
4. Decompression sickness is most commonly caused by?
Oxygen bubbles, Nitrogen bubbles, Carbon dioxide bubbles, Gas bubbles,
5. Which part of the blood primarily carries oxygen around the body?
Platelets, White blood cells, Red blood cells, Plasma,
6. Which statement best describes a diving related embolism?
Death of tissue due to lack of oxygen, A blockage in the circulatory system, A gas filled bubble in the circulatory system, A blockage in the lungs,
7. Severe decompression sickness involves?
The skeletal system, The skin, The central nervous system, The digestive system,
8. Which is a PFO better known as?
Pneomothorax, Ischaemia, Hole in the heart, Air bubbles in the blood,
9. What is the normal breathing rate at rest, on the surface?
16 breaths a minute, 20 breaths a minute, 25 breaths a minute, 30 breaths a minute,
10. Where in the body do diving related embolisms most commonly occur?
In the lungs, In the venous system, In capillaries, In the arterial system,
11. What is the vital lung capacity in the average adult?
1.5 litres, 6 litres, 8 litres, 4.5 litres,
12. What is the average level of carbon dioxide humans breathe out on the surface?
10%, 16%, 4%, 0.4%,
13. Which is the main trigger that stimulates humans to breathe?
A low oxygen level in the blood, A high carbon dioxide level in the blood, A low level of oxygen in the lungs, A low level of carbon dioxide in the lungs,
14. Why is the eustachion tube important to divers?
It allows us to breathe at depth, It ensures proper buoyancy, It equalises pressure on the sinuses, It allows us to equalise our ears,
15. Theoretically nitrogen narcosis starts the minute a diver descends. At what depth do symptoms become apparent to the diver?
0-15 metres, 15-25 metres, 25-35 metres, 35-45 metres,
16. Which of the following symptoms might lead you to suspect carbon monoxide poisoning?
Painful chest, Vomiting and difficulty in breathing, Headache, flushed face and lips, Painful joints and hallucinations,
17. Where is the best place to take a pulse reading on a diver?
The carotid pulse, The radial pulse, The inguinal pulse, The brachial pulse,
18. Which of the following tissue types are the fastest to absorb and release nitrogen?
Fat, Bone, Cartilage, Muscle,
19. Inability to concentrate and/or feelings of euphoria at depth are classical symptoms of?
Mild decompresion sickness, Nitrogen Narcosis, Oxygen toxicity, Carbon monoxide poisoning,
20. Which is a symptom of severe decompression sickness?
Pains in the shoulders, Numbness and pins and needles in the legs, Skin rash, Spitting blood,
Best of luck Maurice |