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SDI Scuba Certification Exam Study Guide with Complete Solutions
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SDI Scuba Certification Exam Study Guide with Complete Solutions
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SDI Scuba Certification Exam StudyGuide with Complete Solutions
A properly weighted scuba diver should float at _____ when their BCD is deflated and
lungs are fully inflated. - ANSWER-eye level
Cylinders should be visually inspected ____ a year and hydrostatically tested every
____ years - ANSWER-once, five
Define maximum dive depth - ANSWER-The deepest point reached during a dive
Define no-stop time - ANSWER-The amount of time remaining at any point during a
dive before incurring a mandatory decompression stop.
Define risk management. - ANSWER-a means of preventing problems and planning a
response to any emergency that may arise. Involves planning ahead, employing good
diving practices, and knowing what to do before an emergency arises.
Define SCUBA - ANSWER-S - self
C - contained
U - underwater
B - breathing
A - apparatus
Describe 2 different ways to indicate "OK." - ANSWER-at surface - both hands on top of
head or tap head with fist of one hand
underwater - pointer finger pressed to thumb (making a circle) and other three fingers
extended up
Describe 2 important features of a weight system. - ANSWER-1) quick release
mechanism
2) evenly-dispersed lead
Describe 2 ways to clear a flooded second stage - ANSWER-1) using purge button
2) exhaling into regulator
Describe all the steps to assemble a BCD and regulator to a scuba cylinder. -
ANSWER-1) cylinder check - look for Visual Inspection sticker, remove valve cover and
check O-ring
2) BCD attachment - Spin the tank around so that the back of the valve is facing you.
Place the BCD band(s) over the top of the cylinder so that the back of the BCD is facing
, you. Raise or lower the BCD so the top is even with the cylinder valve. Fasten the
buckles. Check if secure.
3) Regulator attachment - Remove dust cap, hold first stage in left hand, rotate the
chambers until the primary second stage sits on the right. Screw the knob on your first
stage until it is finger tight. Check if secure.
4) BCD inflator hose attachment - Connect the low pressure inflator hose to the stem on
the BCD's inflator. Check if secure.
5) Turn on air - holding the pressure gauge face down, slowly open valve
counterclockwise. Open all the way then back one rotation. Check SPG. Listen for
hissing sound.
6) Regulator test - depress purge, smell air and taste test both second stages. Test
inflator hose.
7) Streamline hose check.
8) Have buddy double check.
Describe from start to finish the steps to disassemble your scuba system. - ANSWER-1)
Remove accessories and weights
2) Decompress the system: Turn the valve knob completely clockwise. Decompress the
second stage using purge button and the auto inflator button to vent air remaining in the
hoses.
3) Detach the inflator hose from the inflator assembly. Unscrew the yoke knob until the
first stage can slip off the top of the valve. Dry dust cap and place on air inlet.
4) Undo the straps and remove the BCD up and off the cylinder.
5. Rinse off gear throughly. Make sure dust cap is on. Fill and drain BCD properly.
Describe how to perform a giant stride entry off a boat. - ANSWER-Stand on the edge
of the dive platform, check the water below to make sure it is clear of other divers, put
your right hand over your mask and regulator and your left hand over your weight belt
buckle, stand straight, look directly ahead and take a big step out off the edge of the
platform. Signal OK if everything is alright and clear area as instructed.
Describe symptoms of decompression sickness (include mild and severe signs and
symptoms) - ANSWER-Rash or crackling skin caused by nitrogen bubbles in skin
capillaries
joint pain caused by bubbles collecting in and around joints
difficulty breathing
loss of sensation (numbness)
unconsciousness
paralysis
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