SDI Certification Exam Review Graded A+
As pressure increases - ANSWER-Volume decreases
Cylinders should be visually inspected ____ a year and hydrostatically tested every
____ years - ANSWER-Once; five
Define no-stop time - ANSWER-Amount of time remaining at any point during the dive
before a necessary decompression stop
Define risk management - ANSWER-Way of preventing problems and planning a
response to any emergency
Describe the function of regulator first stage and second stage - ANSWER-First stage -
attaches to tank valve and reduces the high-pressure air to intermediate pressure
Second stage - delivers air at ambient pressure directly to the diver
Describe the symptoms of DCS - ANSWER-Rash from bubbles in skin capillaries, joint
pain, difficulty inhaling, loss of sensation, paralysis, could be fatal
Describe two important features of a weight system - ANSWER-Quick release
mechanism, evenly-dispersed lead
Global currents are _____.
Local currents ____. - ANSWER-Fixed
Fluctuate
How do you conduct a safety stop? - ANSWER-Conducted at 15 ft for 3-5 minutes
before surfacing
How do you determine a time limit a repetitive dive from a PDC? - ANSWER-Surface
mode shows depths ranging every ten feet with the no-stop time limits adjusted for
current depth
How do you know if your mask fits correctly? - ANSWER-Will tighten to your face and
won't fall off via suction through your nose
How do you treat a sting? - ANSWER-Hot water or vinegar
How many times more dense is air in a balloon at 4 atm compared to the air density at
the surface? - ANSWER-4 times
How much air should remain in your cylinder upon completing a dive? - ANSWER-500
psi
