Question |
Options |
Answer |
| 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. | |
| A diver is suspected of having decompression sickness. As a part of the management of the accident, you have to: | A: Give oxygen and transport the patient as soon as possible to the nearest recompression chamber
B: Give oxygen and contact only the local emergency medical services.
C: Give oxygen, contact the local emergency medical services and DAN or a local recompression chamber for advise.
D: None of the above. | |
| What does the stamp 200/300, on the neck of the cylinder, mean? | A: You can fill the cylinder to 200 bar and the cylinder have to be tested at 300 bar
B: You can fill the cylinder to 300 bar and the cylinder have to be tested at 200 bar
C: It is only allowed to test the cylinder at 2/3 of the allowable working pressure
D: It is not possible to answer with the given information’s | |
| The person who is credited for creating the first dive tables and developed the mathematical model, which is still used today for tables and divecomputers (with modifications) is called: | A: Haldane
B: Boyle
C: Henry
D: Bühlmann | |
| A diver has a weight of 120 kg, including his body weight and complete dive gear. The diver is neutrally buoyant in fresh water. How much weight does the diver have to add to be neutrally buoyant in the sea? | A: the question is wrong, the diver has to remove 2.4 kg.
B: no additional weight is needed.
C: 2.4 kg
D: 3.6 kg. | |
| Decompression illness type I : | A: does involve neurological symptoms
B: does normally not involve neurological symptoms
C: is not serious as it only involves silent bubbles
D: does not require oxygen as a first-aid procedure. | |
| In a balanced regulator: | A: the opening of the high pressure seat is not assisted or restricted by the pressure in the cylinder.
B: the intermediate pressure is higher than 12 bar.
C: the intermediate pressure stays the same, regardless of depth.
D: None of the above. | |
| What are the consequences of smoking? | A: More carbon monoxide in the blood
B: A weakening of the lung tissues and therefore a bigger risk of lung over expansion injury
C: Is in generally bad for your health
D: All answer above are correct | |
| What could the cause of an “Carotis-Sinus reflex” be? | A: A too tight fitting hood and / or tight neck seal on a dry suit
B: Smoking before diving
C: Excessive hyper ventilation
D: Bad breathing technique or badly maintained equipment | |
| If a balloon with a volume of 8 liter is brought from 10 meters depth to a depth of 30 meters, what would be the new volume? | A: 2 liter
B: 4 liter
C: 12 liter
D: 18 liter | |
| What are the consequence of an elevated nitrogen partial pressure? | A: Red colored lip’s
B: Carotis sinus reflex
C: Hypercapnia
D: Nitrogen narcosis | |
| 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 | |
| Sound under water travels approx. ____ faster than in air | A: 800
B: 20
C: 5
D: 4 | |
| According to which law should a depth gauge work upon if it should give the theoretical depth when diving at altitudes above 300 meters? | A: Henry
B: Boyle
C: Dalton
D: Charles | |
| If you can breath for 120 minutes from a 10 liter scuba-cylinder at 200 bar at the surface, how long could you breath from the same air supply at 20 meters depth? | A: 30 Minutes
B: 40 Minutes
C: 60 Minutes
D: 120 Minutes | |
| What is approx. the partial presure of oxygen at 50 meters. | A: 20%
B: 100%
C: 0.2 bar
D: 1.2 bar | |
| A 10 liter scuba cylinder is filled at 205 bar at a temperature of 14 °C. Left in a car in the sun, the temperature rises to 82 °C. What is the pressure of the cylinder now? | A: 240.8 bar
B: 253.6 bar
C: 159.2 bar
D: 165.7 bar | |
| An object is laying at a depth of 5 meters and has a volume of 344 liters. The weight of the object is 740 kg. How much air should you put in a liftbag to give the object a neutral buoyancy in fresh water. | A: There is not sufficient data to calculate this.
B: 375 liters
C: 594 liters
D: 396 liters | |
| 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 an “environmental seal”? | A: A part screwed on to the first stage to prevent it from freezing up
B: Silicone oil in the first stage to prevent it from freezing up
C: An octopus holder that avoids the octopus from hanging around
D: A and B are correct | |
