Ocean Diver Knowledge: OT1- Adapting to the underwater world

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1. What causes atmospheric pressure at sea level?

Sea temperature

The mass of air that makes up the atmosphere

Wind speed

The amount of cloud in the atmosphere

The lunar phase

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2. What is the atmospheric pressure in a) Bar and b) Kg/cm²?

0.1 bar or 0.1kg/cm2

2 bar or 2kg/cm2

1 bar or 1kg/cm2

100 bar or 100kg/cm2

1.5 bar or 1.5kg/cm2

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3. What is the absolute pressure in bar at 40m?

5 bar

3 bar

6 bar

10 bar

15 bar

20 bar

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4. What happens to the volume of gas in an inverted bucket when taken from the surface to 10m?

Doubles

Halves

Nothing

Gas volume reduces to zero

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5. What glass should be used in the construction of a face mask?

Float glass

Porous glass

Toughened glass

Tempered glass

No glass! Has to be plastic/

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6. What maintenance is required immediately after using diving equipment?

Washed thoroughly with detergent

A full service back at your club/centre

Wash with fresh water

Nothing

Take the kit apart fully and put it all back together again

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7. Air pressure within the body must be kept equal to what if injury is to be avoided?

Surrounding water pressure

Atmospheric air pressure

Higher than surrounding water pressure

Lower than surrounding water pressure

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8. What are the main items of scuba equipment? Please select all that apply.

Cylinder

Mask

Snorkel

Regulator

Buoyancy Compensator

Knife

Torch

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9. What is the name for breathing gas mixtures containing more than 22% oxygen?

Nitrox

Oxygen Plus

Trimix

Heliox

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10. What are the test requirements of a Nitrox cylinder in the UK? Please select all that apply.

Visual inspection every 2 1/2 years?

Hydraulic test every 5 years

Cleaned internally and certified periodically

Replacement every 12 months

There are no formal requirements

Formal check required after every use

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11. What are the test requirements of a non-Nitrox cylinder in the UK? Please select all that apply.

Visual inspection every 2 1/2 years?

Hydraulic test every 5 years

Cleaned internally and certified periodically

Replacement every 12 months

There are no formal requirements

Formal check required after every use

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* 1. What causes atmospheric pressure at sea level?

Question Title

* 2. What is the atmospheric pressure in a) Bar and b) Kg/cm2?

Question Title

* 3. What is the absolute pressure in bar at 40m?

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* 4. What happens to the volume of gas in an inverted bucket when taken from the surface to 10m?

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* 5. What glass should be used in the construction of a face mask?

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* 6. What maintenance is required immediately after using diving equipment?

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* 7. Air pressure within the body must be kept equal to what if injury is to be avoided?

Question Title

* 8. What are the main items of scuba equipment? Please select all that apply.

Question Title

* 9. What is the name for breathing gas mixtures containing more than 22% oxygen?

Question Title

* 10. What are the test requirements of a Nitrox cylinder in the UK? Please select all that apply.

Question Title

* 11. What are the test requirements of a non-Nitrox cylinder in the UK? Please select all that apply.

1. What causes atmospheric pressure at sea level?

2. What is the atmospheric pressure in a) Bar and b) Kg/cm²?

3. What is the absolute pressure in bar at 40m?

4. What happens to the volume of gas in an inverted bucket when taken from the surface to 10m?

5. What glass should be used in the construction of a face mask?

6. What maintenance is required immediately after using diving equipment?

7. Air pressure within the body must be kept equal to what if injury is to be avoided?

8. What are the main items of scuba equipment? Please select all that apply.

9. What is the name for breathing gas mixtures containing more than 22% oxygen?

10. What are the test requirements of a Nitrox cylinder in the UK? Please select all that apply.

11. What are the test requirements of a non-Nitrox cylinder in the UK? Please select all that apply.