Physics

Question 1

State Boyles law

Answer 1

Volume and Pressure

Question 2

Normal gas consumption
Metric/Imperial

Answer 2

35L/min
1.25ft3/min

Question 3

Emergency breathing rate
Metric/Imperial

Answer 3

40L/min
1.5ft3/min

Question 4

Density of water
Salt
Fresh

Answer 4

Salt Water;
64.38Lbs
1030kg/m3
1.03T/m3

Fresh Water;
62.5Lbs
1000kg/m3
1.0T/m3

Question 5

Bar and ATA required to drive the demand valve

Answer 5

10bar or 10ata

Question 6

Celsius to Kelvin

Answer 6

+273

Question 7

Fahrenheit to Rankin

Answer 7

+460

Question 8

Convert 500ppm to %

Answer 8

500 / 10,000
= 0.05%

Question 9

Chamber @80msw
Analyzer reads 400ppm
What is the ppCO2?

Answer 9

Convert ppm to % then simple T formula.

400ppm / 10,000 = 0.04%
90msw x 0.04 =
3.6mb

Question 10

Chamber @80msw
With 4.5% O2
What is the ppO2?

Answer 10

90 x 4.5% = 405mb
Or
9 x 0.045 = 0.405bar

Question 11

Max ppO2 diving

Answer 11

1.4bar
1400mb

Question 12

Max ppm CO2

Answer 12

5000ppm surface equivalent

Question 13

When venting chambers what happens to the;
% and partial pressure

Answer 13

% stays the same
pp will fall

Question 14

State the 3 methods of heat transfer

Answer 14

Conduction
Convection
Radiation

Question 15

2% CO2 on surface analyzer equals x at 28msw

Answer 15

3.8 x 2 = 7.6%

Question 16

Convert Fahrenheit to Celsius
And vice versa

Answer 16

F = temp x 1.8 + 32
C = temp - 32 / 1.8

Question 17

Metabolic 02 rate

Answer 17

Regardless of depth;
0.5L/min
30L/hr
0.72m3/day

Or 25ft3/day

Question 18

Formula used to Calculate volume of a cylinder

Answer 18

Pi x radius squared x height

Question 19

Normal gas consumption
Metric/Imperial

Answer 19

35L/min
1.25ft3/min

Question 20

Emergency breathing rate
Metric/Imperial

Answer 20

40L/min
1.5ft3/min

Question 21

Density of water
Salt
Fresh

Answer 21

Salt Water;
64.38Lbs
1030kg/m3
1.03T/m3

Fresh Water;
62.5Lbs
1000kg/m3
1.0T/m3

Question 22

Bar and ATA required to drive the demand valve

Answer 22

10bar or 10ata

Question 23

Celsius to Kelvin

Answer 23

+273

Question 24

Fahrenheit to Rankin

Answer 24

+460

Question 25

Convert 500ppm to %

Answer 25

500 / 10,000
= 0.05%

Question 26

Chamber @80msw
Analyzer reads 400ppm
What is the ppCO2?

Answer 26

Convert ppm to % then simple T formula.

400ppm / 10,000 = 0.04%
90msw x 0.04 =
3.6mb

Question 27

Chamber @80msw
With 4.5% O2
What is the ppO2?

Answer 27

90 x 4.5% = 405mb
Or
9 x 0.045 = 0.405bar

Question 28

Max ppO2 diving

Answer 28

1.4bar
1400mb

Question 29

Max ppm CO2

Answer 29

5000ppm surface equivalent

Question 30

When venting chambers what happens to the;
%
And
pp

Answer 30

% stays the same
pp will fall

Question 31

State the 3 methods of heat transfer

Answer 31

Conduction
Convection
Radiation

Question 32

2% CO2 on surface analyzer equals x at 28msw

Answer 32

3.8 x 2 = 7.6%

Question 33

Convert Fahrenheit to Celsius
And vice versa

Answer 33

F = temp x 1.8 + 32
C = temp - 32 / 1.8

Question 34

Metabolic 02 rate

Answer 34

Regardless of depth;
0.5L/min
30L/hr
0.72m3/day

Or 25ft3/day

Question 35

Formula used to Calculate the volume of a cylinder

Answer 35

Pi x radius squared x height
(If using imperial, convert to ft/in into decimals)

Question 36

State the density of Sea Water and Fresh Water;

Answer 36

Sea Water;
1030kg/m3 or 1.03T
64.38lbs/ft3

Fresh Water;
1000kg/m3 or 1T
62.5lbs/ft3

Question 37

Metric Ton vs Imperial

Answer 37

Metric Ton;
2240lbs / 1000kg

Imperial Ton;
2000lbs