Question |
Options |
Answer |
| Which factors can contribute to decompression illness? | A: Altered circulation
B: Increased metabolism
C: A and B are correct
D: High water temperature | |
| When an object is ___ kg negatively buoyant you should use an lifting device to recover the object: | A: 10 - 15 kg
B: 4 - 5 kg
C: 15 - 20 kg
D: This depends on the physical force of the diver | |
| 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. | |
| Sound travels ____ times faster under water, than in air. | A: 2
B: 3
C: 4
D: 5 | |
| Why should you have your cylinder visually inspected? To look for: | A: Corrosion on the inner side of the cylinder
B: Corrosion on the bottom of the cylinder
C: Corrosion between the cylinder and valve
D: All of the above answers are correct | |
| At which depth is the partial pressure of oxygen in air 1.6 bar and consequently starts the risk of convulsions without warning? | A: 100 meters
B: 40 meters
C: 70 meters
D: 66 meters | |
| 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 | |
| During a night dive each diver should at least have: | A: One primary light
B: One primary light and one backup light
C: One primary light and two backup lights
D: One primary light, one backup light and one chemical light-stick | |
| What is the pressure at 26 meters in fresh water. | A: 2.6 bar
B: 3.6 bar
C: 2.5 bar
D: 3.5 bar | |
| A cylinder is filled to a pressure of 205 bar and reaches a temperature of 71 °C. This cylinder is then taken to an environment with a temperature of 4 °C. What will be the new pressure? | A: 245 bar
B: 175 bar
C: 255 bar
D: 165 bar | |
| 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 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 | |
| Because of _________________ you see less contrast under water than you do in air. | A: refraction
B: reflection
C: absorption
D: diffusion | |
| A 12 liter scuba cylinder is filled at 200 bar at a temperature of 61 °C. Over night, the temperature drops to 11 °C. What is the pressure of the cylinder now? | A: 150 bar
B: 170 bar
C: 230 bar
D: 235 bar | |
| What is anoxia? | A: To little oxygen.
B: To much oxygen.
C: No Nitrogen.
D: No oxygen. | |
| After a lung overpressure injury, air is accumulated in the center of the chest, between the tissues and around the hart. This indicates a condition called: | A: Pneumathorax
B: Mediastinal emphysema
C: Air embolism
D: Subcutaneous emphysema | |
| What does the + stamp, on the neck of the cylinder, mean? | A: You can fill the cylinder to 10 % above the working pressure
B: The cylinder have to be controlled more often
C: The cylinder can be used twice as long without testing it
D: It is an aluminum cylinder | |
| 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 have the biggest influence on tides? | A: The gravity from the sun
B: The gravity from the sun and the moon
C: Storms and hurricanes around the world
D: Currents and topography of the oceans | |
| 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 | |
