SSI Review Questions – Study Guide, Key Concepts & Practice Questions
Collection
Absolute pressure is defined as:
The total pressure exerted on an object
The weight of the water that surrounds a diver
The pressure at the surface plus 1 bar
All answers are correct - correct answer ✔✔The Total pressure on on object
If a flexible air-filled container has a volume of 40 cu ft on the surface, what would the volume
be at 99 feet in sea water? (rounded off)
20 cu ft
25 cu ft
60 cu ft
10 cu ft - correct answer ✔✔10 cu ft
The event that led to the use of the acronym SCUBA to describe diving was:
,The invention of the diving helmet in circa 1800
The development of air pumps in the 19th century
Post-WWII equipment refinements
The development of the demand regulator in 1943 - correct answer ✔✔The development of
the demand regulator in 1943
Gauge pressure is defined as:
Hydrostatic pressure minus 1 bar
The depth reading on a gauge
Absolute pressure minus 1 bar
The pressure at the surface - correct answer ✔✔Absolute pressure minus 1 bar
The absolute pressure expressed in terms of bar at 99feet in salt water is:
3 bar
3.5 bar
, 2.5 bar
4 bar - correct answer ✔✔4 bar
Salt water weighs ___ pounds per cubic foot and freshwater weighs ___ pounds per cubic foot.
54/50
64/62.5
65/68
They both weigh the same - correct answer ✔✔64/62.5
The absolute pressure expressed in terms of atmospheres absolute at 33 feet in sea water is:
4 ata
3 ata
2 ata
1 ata - correct answer ✔✔2 ata
Describing diving with the acronym SCUBA came from what event?
Collection
Absolute pressure is defined as:
The total pressure exerted on an object
The weight of the water that surrounds a diver
The pressure at the surface plus 1 bar
All answers are correct - correct answer ✔✔The Total pressure on on object
If a flexible air-filled container has a volume of 40 cu ft on the surface, what would the volume
be at 99 feet in sea water? (rounded off)
20 cu ft
25 cu ft
60 cu ft
10 cu ft - correct answer ✔✔10 cu ft
The event that led to the use of the acronym SCUBA to describe diving was:
,The invention of the diving helmet in circa 1800
The development of air pumps in the 19th century
Post-WWII equipment refinements
The development of the demand regulator in 1943 - correct answer ✔✔The development of
the demand regulator in 1943
Gauge pressure is defined as:
Hydrostatic pressure minus 1 bar
The depth reading on a gauge
Absolute pressure minus 1 bar
The pressure at the surface - correct answer ✔✔Absolute pressure minus 1 bar
The absolute pressure expressed in terms of bar at 99feet in salt water is:
3 bar
3.5 bar
, 2.5 bar
4 bar - correct answer ✔✔4 bar
Salt water weighs ___ pounds per cubic foot and freshwater weighs ___ pounds per cubic foot.
54/50
64/62.5
65/68
They both weigh the same - correct answer ✔✔64/62.5
The absolute pressure expressed in terms of atmospheres absolute at 33 feet in sea water is:
4 ata
3 ata
2 ata
1 ata - correct answer ✔✔2 ata
Describing diving with the acronym SCUBA came from what event?
