Test - how good is your knowledge really?

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
What are the consequence of an elevated nitrogen partial pressure?	A: Red colored lip’s B: Carotis sinus reflex C: Hypercapnia D: Nitrogen narcosis	?ABCD
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	?ABCD
Extreme advanced hypothermia:	A: has symptoms including shivering and numb fingers and toes. B: is easily handled by simple rewarming. C: is impossible when wearing a dry suit. D: Non of the above.	?ABCD
The sign and symptoms of Nitrogen narcosis could include _____and would normally subside when the diver______:	A: Euphoria / ascents to a shallower depth B: Euphoria / descents deeper C: Anxiety / is placed in a recompression chamber D: Anxiety / descents deeper	?ABCD
When affected by the visual reversal phenomenon, objects under water which are several meters away from you can appear to be:	A: smaller and further away B: bigger and further away C: bigger and closer D: smaller and closer	?ABCD
If you equalize to strong using the valsalva method, you risk:	A: a ruptured eardrum. B: a lung over expansion injury. C: an round window rupture. D: an oval window rupture.	?ABCD
What is a hydrostatic test?	A: A test to verify that diving equipment is anti-magnetic when under water. B: A test to see to which depth a drysuit can be used. C: A test to give a regulator CEN approval. D: A test in which the cylinder is filled with water and put under pressure.	?ABCD
A diver is using a special scuba unit. The unit releases bubbles only on very seldom occasions, such as during the ascent. A unit of this type is called:	A: a broken scuba unit. B: an open circuit scuba system. C: a semi closed rebreather. D: a closed system rebreather.	?ABCD
Breathing 1% carbonmonoxide (CO) at a depth of 30 meters has the same effect as breathing a gas with ____ % of carbonmonoxide at the surface.	A: 1 B: 2 C: 3 D: 4	?ABCD
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	?ABCD
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	?ABCD
The RDP is an____________model with _________compartments than the US-Navy table:	A: Multi compartment / less B: Multi compartment / more C: Mono compartment / less D: Mono compartment / more	?ABCD
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	?ABCD
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.	?ABCD
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	?ABCD
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	?ABCD
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	?ABCD
How many compartments is the PADI RDP using to calculate surface intervals?	A: One compartment B: Six compartments C: Fourteen compartments D: That depends on the controlling compartment from the dive	?ABCD
Looking at the main ocean currents, you can expect the water along the coast of Japan the be:	A: flowing south and being warm. B: flowing north and being cold. C: flowing north and being warm. D: flowing south and being cold.	?ABCD
A diver uses 2 bar per minute from a 10 liter cylinder at the surface. If all other factors remain the same, what would the consumption of the diver be at a depth of 20 meters.	A: 2 bar B: 4 bar C: 12 bar D: 6 bar	?ABCD
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