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
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	?ABCD
What is the effect of voluntary hyper ventilation before doing apnea?	A: More oxygen in the in the blood and therefor you can breath hold dive longer B: The carbon dioxide level in your body is decreased and the breathing impulse will be delayed C: The carbon monoxide level in your body is decreased and the breathing impulse will be delayed D: There is no effect	?ABCD
If a balloon with a volume of 6 liter is brought from the surface to a depth of 20 meters, what would be the new volume?	A: 2 liter B: 3 liter C: 6 liter D: 18 liter	?ABCD
When performing the controlled emergency swimming ascent the student have to:	A: Drop the weight belt and then swim as fast as possible against the surface while continuously making an aaaaah sound B: Drop the regulator and swim to the surface emitting an aaaaah sound C: Ascent to the surface with an normal ascent rate with all the equipment in place and emitting an aaaaaah sound D: Keeping all equipment in place, ascent to the surface with the help from a rope, while emitting an aaaah sound	?ABCD
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	?ABCD
Because of _________________ you see less contrast under water than you do in air.	A: refraction B: reflection C: absorption D: diffusion	?ABCD
What is the problem with an pneumothorax?	A: Air caught between the lung and the pleural lining which will expand during the ascent and can cause heart problems B: Air caught in the neck and is causing changes to the voice C: Air in the blood D: Air caught around the heart/lung, that during ascent expands, causing the symptoms of shortness of breath	?ABCD
If you have an diver suspected of having decompression illness, which of the following procedures should you NOT follow:	A: Let the person lay down and donate O2 B: Perform first aid and contact the EMS C: Encourage the person to take a hot shower and move a lot around to eliminate N2 bubbles D: Perform first aid	?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
What can cause an “vertigo”?	A: Cold water entering the ear B: A ruptured eardrum C: A light case of reverse block in one ear D: All answers above are correct	?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
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.	?ABCD
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	?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
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	?ABCD
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.	?ABCD
A 5 minute compartment has reached (approached) the equilibrium with the surrounding pressure, in ______ minutes after arriving in an environment with a different pressure.	A: 5 minutes (because it is the 5 minute compartment) B: 30 minutes (because there are 6 periods) C: 70 minutes (because the RDP has 14 compartments) D: 10 minutes (because that completes 2 halftimes ½ + ½ = 1 complete)	?ABCD
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
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.	?ABCD
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	?ABCD
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