Section 1

Question 1

What is SCUBA an acronym for?

Answer 1

Self-contained underwater breathing apparatus

Question 2

Weight of a litre of air?

Answer 2

1.29g

Question 3

Weight of a litre of fresh water?

Answer 3

1kg

Question 4

Weight of a litre of salt water?

Answer 4

1.025kg

Question 5

Definition of one atmosphere

Answer 5

Weight of a column of air one square cm extending from sea level to the outer edge of the earths atmosphere (about 400km)

Question 6

Pressure of one atmosphere

Answer 6

1.0 bar of pressure

Question 7

1 bar of pressure per ?m sea water

Answer 7

10m

Question 8

1 bar of pressure per ?m of fresh water?

Answer 8

10.2m

Question 9

Absolute pressure at sea level

Answer 9

1 bar

Question 10

Gauge pressure at sea level

Answer 10

0 bar

Question 11

Pressure increase per m of descent in salt water

Answer 11

0.1 bar

Question 12

Pressure equalisation protects against ???

Answer 12

Squeeze

Question 13

Body parts that can be affected by squeeze?

Answer 13

Ears, sinuses, lungs, teeth and intestines

Question 14

How do you prevent mask squeeze?

Answer 14

Exhale into your mask every metre while descending

Question 15

Equalisation techniques

Answer 15

Swallowing
Rotating the jaw
Valsalva technique