Scuba O/W 2

By admin / September 27, 2020

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Question 1 of 10

1. Question
1. The stage of the regulator which reduces tank pressure is:
- a) The second stage.
- b) The first stage.
- c) The intermediate stage.
- d) The alternate stage.
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Question 2 of 10

2. Question
1. Two types of materials that scuba tanks are made from are steel and _________.
- a) aluminum
- b) titanium
- c) stainless steel
- d) graphite
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Question 3 of 10

3. Question
1. The _________ line is the direction of travel line on the compass.
- a) index/tick mark
- b) lubber
- c) degree
- d) descent
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Question 4 of 10

4. Question
15. The dive knife is used primarily as a _________ for digging, cutting, pounding and prying.
- a) weapon
- b) file
- c) tool
- d) measure
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Question 5 of 10

5. Question
1. Stamped (engraved) markings on scuba tanks include:
- a) Serial number, name, rank.
- b) Date of hydrostatic test, serial number, type of material.
- c) Type of material, physical length, weight.
- d) Visual inspection information, serial number, date of hydrostatic test.
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Question 6 of 10

6. Question
1. Atmospheric pressure at sea level is:
- a) 29.4 pounds per square inch/ 2.0 atmospheres absolute
- b) 14.7 pounds per square inch/1.0 atmosphere absolute
- c) 44.1 pounds per square inch/ 3.0 atmospheres absolute
- d) 58.8 pounds per square inch/ 4.0 atmospheres absolute
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Question 7 of 10

7. Question
1. A sealed balloon filled with air that has a volume of 6 cubic inches at 99 feet will have a volume of ____________ at 33 feet.
- a) 3 cubic inches
- b) 9 cubic inches
- c) 12 cubic inches
- d) 24 cubic inches
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Question 8 of 10

8. Question
19. Sea water weighs:
- a) 14.7 pounds per cubic foot
- b) 0.445 pounds per cubic foot
- c) 62.4 pounds per cubic foot
- d) 64.0 pounds per cubic foot
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Question 9 of 10

9. Question
20. Which gas law best explains diving medical problems such as ear and sinus squeeze?
- a) Water density
- b) Dalton’s law
- c) Charles’ law
- d) Boyle’s law
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Question 10 of 10

10. Question
1. You should have your regulator serviced by a certified repair technician
- a) once every five years.
- b) at least once per year.
- c) once, immediately after you buy it.
- d) once every ten years.
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