SDI Scuba Certification Exam Study Guide
A properly weighted scuba diver should float at _____ when
their BCD is deflated and lungs are fully inflated. Correct
Answers eye level
Cylinders should be visually inspected ____ a year and
hydrostatically tested every ____ years Correct Answers once,
five
Define maximum dive depth Correct Answers The deepest
point reached during a dive
Define no-stop time Correct Answers The amount of time
remaining at any point during a dive before incurring a
mandatory decompression stop.
Define risk management. Correct Answers 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 Correct Answers S - self
C - contained
U - underwater
B - breathing
A - apparatus
Describe 2 different ways to indicate "OK." Correct Answers
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. Correct
Answers 1) quick release mechanism
2) evenly-dispersed lead
Describe 2 ways to clear a flooded second stage Correct
Answers 1) using purge button
2) exhaling into regulator
Describe all the steps to assemble a BCD and regulator to a
scuba cylinder. Correct Answers 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. Correct Answers 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. Correct
Answers 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.
A properly weighted scuba diver should float at _____ when
their BCD is deflated and lungs are fully inflated. Correct
Answers eye level
Cylinders should be visually inspected ____ a year and
hydrostatically tested every ____ years Correct Answers once,
five
Define maximum dive depth Correct Answers The deepest
point reached during a dive
Define no-stop time Correct Answers The amount of time
remaining at any point during a dive before incurring a
mandatory decompression stop.
Define risk management. Correct Answers 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 Correct Answers S - self
C - contained
U - underwater
B - breathing
A - apparatus
Describe 2 different ways to indicate "OK." Correct Answers
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. Correct
Answers 1) quick release mechanism
2) evenly-dispersed lead
Describe 2 ways to clear a flooded second stage Correct
Answers 1) using purge button
2) exhaling into regulator
Describe all the steps to assemble a BCD and regulator to a
scuba cylinder. Correct Answers 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. Correct Answers 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. Correct
Answers 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.
