SSI ASSISTANT INSTRUCTOR PRE TEST |ACTUAL
QUESTIONS AND VERIFIED ANSWERS|BRAND NEW
2026-2027 UPDATE|GRADED A+
Question 1
Assuming a maximum partial pressure limitation of 1.4 bar, the maximum depth for a 32%
nitrox mixture is ____ of seawater.
33.7 m
20 m
66 m
43.7 m
CORRECT ANSWER
33.7 m
Question 2
Which physical law states: "If temperature remains constant, the pressure and volume of
any gas are inversely related"?
Dalton
Henry
Archimedes
Boyle
Save
CORRECT ANSWER
Boyle
Question 3
1
@https://www.stuvia.com/user/thestudyvault
,For every meter of depth in freshwater, pressure changes by:
0.013 bar
0.098 bar
0.100 bar
1.03 bar
CORRECT ANSWER
0.098 bar
Question 4
diver and his / her equipment weigh 87 kg when neutrally buoyant in saltwater. To be
neutrally buoyant for freshwater diving with the same equipment, he /she has to:
Add weight
All answers are correct
Use the same weight
Remove weight
CORRECT ANSWER
Remove weight
Question 5
If 2 liters of air are needed in your buoyancy compensator to maintain neutral buoyancy at
10m in the ocean, what will happen to your buoyancy if you ascend 3 m without deflating:
Your positive buoyancy will increase
There will be no change in buoyancy
Your negative buoyancy will increase
You will stay neutral no matter if you ascend or descend
CORRECT ANSWER
2
@https://www.stuvia.com/user/thestudyvault
, Your positive buoyancy will increase
Question 6
Breathing gas consumption:
Varies inversely with depth
Increases as depth increases
Decreases as depth increases
Remains the same as depth increases
CORRECT ANSWER
Increases as depth increases
Question 7
The ocean depth at which the partial pressure of oxygen in air equals 1.6 bar is _____
meters assuming O2 = 21%.
70
85
66
55
CORRECT ANSWER
66
Question 8
Assuming a maximum partial pressure limitation of 1.4 bar, the maximum MOD for a 40%
nitrox mixture in the ocean is:
35 meters
3
@https://www.stuvia.com/user/thestudyvault
, 25 meters
40 meters
20 meters
CORRECT ANSWER
25 meters
Question 9
The absolute pressure at a depth of 50 meters in salt water is:
5.012 bar
6.000 bar
5.000 bar
5.901 bar
CORRECT ANSWER
6.000 bar
Question 10
What would be the surface air consumption rate (SAC) of a diver with a 200bar, 10 liter
cylinder who uses 50bar in 10 minutes at a depth of 10 meters in the ocean?
25 liters / minute
50 liters / minute
35 liters / minute
10 liters / minute
CORRECT ANSWER
25 liters / minute
4
@https://www.stuvia.com/user/thestudyvault
QUESTIONS AND VERIFIED ANSWERS|BRAND NEW
2026-2027 UPDATE|GRADED A+
Question 1
Assuming a maximum partial pressure limitation of 1.4 bar, the maximum depth for a 32%
nitrox mixture is ____ of seawater.
33.7 m
20 m
66 m
43.7 m
CORRECT ANSWER
33.7 m
Question 2
Which physical law states: "If temperature remains constant, the pressure and volume of
any gas are inversely related"?
Dalton
Henry
Archimedes
Boyle
Save
CORRECT ANSWER
Boyle
Question 3
1
@https://www.stuvia.com/user/thestudyvault
,For every meter of depth in freshwater, pressure changes by:
0.013 bar
0.098 bar
0.100 bar
1.03 bar
CORRECT ANSWER
0.098 bar
Question 4
diver and his / her equipment weigh 87 kg when neutrally buoyant in saltwater. To be
neutrally buoyant for freshwater diving with the same equipment, he /she has to:
Add weight
All answers are correct
Use the same weight
Remove weight
CORRECT ANSWER
Remove weight
Question 5
If 2 liters of air are needed in your buoyancy compensator to maintain neutral buoyancy at
10m in the ocean, what will happen to your buoyancy if you ascend 3 m without deflating:
Your positive buoyancy will increase
There will be no change in buoyancy
Your negative buoyancy will increase
You will stay neutral no matter if you ascend or descend
CORRECT ANSWER
2
@https://www.stuvia.com/user/thestudyvault
, Your positive buoyancy will increase
Question 6
Breathing gas consumption:
Varies inversely with depth
Increases as depth increases
Decreases as depth increases
Remains the same as depth increases
CORRECT ANSWER
Increases as depth increases
Question 7
The ocean depth at which the partial pressure of oxygen in air equals 1.6 bar is _____
meters assuming O2 = 21%.
70
85
66
55
CORRECT ANSWER
66
Question 8
Assuming a maximum partial pressure limitation of 1.4 bar, the maximum MOD for a 40%
nitrox mixture in the ocean is:
35 meters
3
@https://www.stuvia.com/user/thestudyvault
, 25 meters
40 meters
20 meters
CORRECT ANSWER
25 meters
Question 9
The absolute pressure at a depth of 50 meters in salt water is:
5.012 bar
6.000 bar
5.000 bar
5.901 bar
CORRECT ANSWER
6.000 bar
Question 10
What would be the surface air consumption rate (SAC) of a diver with a 200bar, 10 liter
cylinder who uses 50bar in 10 minutes at a depth of 10 meters in the ocean?
25 liters / minute
50 liters / minute
35 liters / minute
10 liters / minute
CORRECT ANSWER
25 liters / minute
4
@https://www.stuvia.com/user/thestudyvault
