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Below you will find 20 questions, selected randomly from our database. Choose the best answer to each of the questions. Once you answered all questions, enter your first name and your email address. You receive the score for all questions, and – if you should have mistakes – the correct answers by email.
Question
Options
Answer
How is the Oxygen transported in our body?A: In the white blood cells
B: In the hemoglobin
C: In solution in the blood plasma
D: B and C are correct
If the percentage of CO2 in the air you exhale is 4% at the surface, then what is the percentage of CO2 in the air you exhale at a depth of 30 meters, if all other factors stay the same (this is a physiology question).A: 4%
B: 1%
C: 16%
D: You don’t exhale CO2 underwater, but CO.
Why is it important to donate pure oxygen to someone who is suffering from decompression illness?A: Pure oxygen is making the metabolism work better
B: Decreasing of the nitrogen in the inhaled air
C: To improve the blood transportation
D: To decrease the breathing rhythm
Which definition of an balanced first stage is correct?A: When the pressure in the cylinder is decreasing the intermediate pressure is also decreasing
B: When the pressure in the cylinder is decreasing the intermediate pressure stays the same
C: When the pressure in the cylinder is decreasing the intermediate pressure increases
D: The question can’t be answered since we have to know which type the second stage is
If a balloon with a volume of 4.5 liter is brought from 14 meters depth to a depth of 37 meters, what would be the new volume?A: 2.3 liter
B: 8.8 liter
C: 4.5 liter
D: 2.1 liter
What is hypocapnia?A: Low blood sugar.
B: To little CO2 to give a breathing impulse
C: To much CO2, causing overexertion.
D: To little nitrogen
Compared to a steel cylinder, an aluminum cylinder has:A: thicker walls.
B: a smaller inner volume, compared to the outer volume.
C: less risk of corrosion.
D: All of the above.
What should you do, if you have a person who have had a near drowning accident but says that he feels all right:A: Send the person to a medical clinic for further observations
B: Give the patient something to drink
C: Bring the person with on the next dive
D: Transport the person to the nearest recompression chamber
It is recommended that you do a safety stop at the end of your dive to:A: Exhale as much CO2 as possible
B: Exhale as much CO as possible
C: Exhale as much O2 as possible
D: Exhale as much N2 as possible
What is the difference between steel and aluminum cylinders?A: The inner volume of a steel cylinder is bigger compared to the outer volume
B: The walls of a steel cylinder is thinner
C: When diving with an aluminum cylinder you need more weight
D: All of the above answers are correct
If you want to navigate a triangle with a compass, you have to turn ____ degrees for every change of direction.A: 60
B: 120
C: 90
D: 180
To have perfect buoyancy during your dives, you should perform a weight check by:A: When holding a normal breath you should float at eye level without air in the BCD and without moving the fins
B: Float at eye level with the BCD full and holding a normal breath
C: Sinking slowly with an empty BCD while holding a normal breath and without moving the fins
D: Without any fin movement, sink until the head is completely U/W with an empty BCD and while holding a normal breath
What should you do if you accidentally leave out an emergency decompression stop?A: Immediately descent to 12 meters and follow the recommended procedures
B: Breath pure oxygen
C: Don’t dive for 24 hours
D: Answer B and C is correct
Nitrogen narcoses is seen as being a concern starting at a depth of _____ meters.A: 18
B: 40
C: 24
D: 30
Enriched air cylinders need special markings to:A: make sure that the diver who verified the blend is the one who is going to use it.
B: avoid that other divers mistakenly take the cylinder, assuming that they dive with air.
C: avoid that the cylinder is mistakenly filled with a traditional air compressor.
D: All of the above.
Until which altitude can you use the RDP without having to recalculate the depths and PG?A: Not at all
B: 300 Meters
C: 600 Meters
D: 900 Meters
When do you have to hydrostatic test your cylinder?A: When you haven’t been using the cylinder for an period of two years
B: When it have been damage due to an fall
C: When it have been exposed to temperatures exceeding 82 °C
D: All of the above answers are correct
What is hypercapnia?A: a low body temperature.
B: to much nitrogen
C: to little CO2
D: to much CO2
When using dive computers:A: you have a more valid decompression model than when diving with tables.
B: each diver should have a personal computer.
C: you can avoid many of the guidelines required when diving with tables.
D: All of the above.
Convulsions under water indicate:A: decompression illness
B: CNS oxygen poisoning
C: decompression sickness
D: oxygen poisoning to the lungs

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