SDI Scuba Certification Exam Study Guide with Complete Solutions
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Course
SDI
Institution
SDI
SDI Scuba Certification Exam Study
Guide with Complete Solutions
Define SCUBA - Answer-S - self
C - contained
U - underwater
B - breathing
A - apparatus
List 3 important scuba diving changes that occurred in 1950s - Answer-1)
published USN dive tables
2) invented the personal dive computer...
not leave the area? - Answer✔✔-Remain still and calm. Slowly leave area if
necessary.
List three different reasons that it is advisable to check with your local dive center before
conducting a dive in an area you are unfamiliar with? - Answer✔✔-1) tidal conditions
2) marine life
3) first aid for potential injuries in area
What is the absolute pressure (in atm/bar) at 20 meters (66 feet)? - Answer✔✔-3
atm/bar
What will be the volume in a ball that is filled with 2 cubic feet/liters of air at 30 meters
(90 feet) when it is taken to surface? - Answer✔✔-8 cubic feet/liter (4x the volume)
How many more times dense is the air in a ballon at 4 atm/bar compared to air density
at surface? - Answer✔✔-4x
If a scuba cylinder lasts two hours at sea level, how long will it last at 20 m/66 ft? -
Answer✔✔-40 minutes
120 min x 1/3 (vol) = 40 min
How often should a scuba diver equalize during descent? - Answer✔✔-At the surface
before descent and every couple of feet
3/16
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