Section 2

Question 1

External conduction

Answer 1

Heat energy transferring to water

Question 2

Internal conduction

Answer 2

Heat energy transferring to cold gas from air cylinder

Question 3

Convection

Answer 3

Constant movement of water across our bodies. Water molecules are warmed through external conduction and then replaced with cold molecules.

Question 4

Blood shunting

Answer 4

Circulation to extremities is slowed to keep brain and torso warm

Question 5

Most efficient breathing pattern for scuba

Answer 5

Deep inhalation followed by an even exhalation

Question 6

Regulator

Answer 6

Automatically regulates cylinder pressure to ambient pressure

Question 7

Air consumption ? at 10m depth

Answer 7

Doubles

Question 8

Air consumption increases in direct proportion to depth due to ?

Answer 8

Boyles law

Question 9

Proper attitude for regulator

Answer 9

15 to 20 degrees above horizontal

Question 10

Delivery system includes ?

Answer 10

Regulator, alternate air source and high pressure scuba cylinder

Question 11

Submersible pressure gauge (spg)

Answer 11

Attached to first stage regulator and tells how much gas

Question 12

3 rules of scuba

Answer 12

Breathe continuously
Ascend slowly and maintain control
Never dive alone or beyond your level of training

Question 13

Why breathe continuously

Answer 13

Prevent over expansion - as you ascend the volume of the air in your lungs increases

Question 14

Maximum ascent rate

Answer 14

9m per minute

Question 15

At what depth do you need to worry about nitrogen saturation

Answer 15

Greater than 10m

Question 16

Dive plan - rule of thirds

Answer 16

1/3 of the pressure or your air to explore
1/3 to return to your ascent point
1/3 for ascent and safety stops

Question 17

Ascent safety stop

Answer 17

At 5m for 3 to 5 mins

Question 18

How long before flying after diving

Answer 18

At least 24 hours