SDI Open Water Exam 2025 Questions
and Answers
Describe all the steps to assemble a BCD and regulator to a scuba cylinder. -
ANSWER-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. 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. Connect the low pressure inflator hose to the stem on the BCD's
inflator. Turn on the air.
How should you go about checking that your BCD is attached securely to your
cylinder? - ANSWER-You lift up by the BCD and gently shake it.
What is the purpose of streamlining your hoses and accessories? - ANSWER-So
they don't get tangled/ in the way.
Describe from the start to finish the steps to disassemble your scuba system. -
ANSWER-1. Remove accessories and weights
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,2. Decompress the system: Turn the valve knob completely clockwise.
Decompress one of the second gauges (purge button or the auto inflator button to
vent air remaining in the hoses)
3. Detach the LP hose from the inflator assembly by pulling the collar back on the
quick disconnect. Unscrew the yoke knob until the first stage can slip off the top
of the valve.
4. Undo the straps and remove the BCD from the cylinder.
5. Rinse off gear and fill and dump BCD
*Describe two important features of a weight system.* - ANSWER-1. To weigh
you down
2. You can use different weights
What should you do any time the second stage is out of your mouth? - ANSWER-
Put the back up in your mouth then do either a sweep or reach technique to get it
back.
Describe two ways to clear a flooded second stage. - ANSWER-1. Depress the
purge button before inhaling.
2. Exhale into the mouthpiece.
What is the hand signal for out-of-air? - ANSWER-Flat hand cut across your neck
The thumbs up signal means "OK." True or False? - ANSWER-False
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, Describe two different ways to indicate "OK". - ANSWER-1. Pointer thumb
touch
2. Fist on your head
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.
Name four different water entries. - ANSWER-1. Giant stride
2. Controlled sated
3. Back roll entry
4. Shore entry
Describe the two emergency out-of-air ascents. - ANSWER-1. Signal out of air
2. Remove regulator, exhale, reach for your buddy's alternate air source.
3. Put in your mouth, purge and breath exchanging "OK" and "Go up" hand
signals.
4. Donor should hold onto the receiver's BCD shoulder strap as you slowly ascend
together.
5. Orally inflate your BCD when you reach the surface.
COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 3
and Answers
Describe all the steps to assemble a BCD and regulator to a scuba cylinder. -
ANSWER-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. 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. Connect the low pressure inflator hose to the stem on the BCD's
inflator. Turn on the air.
How should you go about checking that your BCD is attached securely to your
cylinder? - ANSWER-You lift up by the BCD and gently shake it.
What is the purpose of streamlining your hoses and accessories? - ANSWER-So
they don't get tangled/ in the way.
Describe from the start to finish the steps to disassemble your scuba system. -
ANSWER-1. Remove accessories and weights
COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 1
,2. Decompress the system: Turn the valve knob completely clockwise.
Decompress one of the second gauges (purge button or the auto inflator button to
vent air remaining in the hoses)
3. Detach the LP hose from the inflator assembly by pulling the collar back on the
quick disconnect. Unscrew the yoke knob until the first stage can slip off the top
of the valve.
4. Undo the straps and remove the BCD from the cylinder.
5. Rinse off gear and fill and dump BCD
*Describe two important features of a weight system.* - ANSWER-1. To weigh
you down
2. You can use different weights
What should you do any time the second stage is out of your mouth? - ANSWER-
Put the back up in your mouth then do either a sweep or reach technique to get it
back.
Describe two ways to clear a flooded second stage. - ANSWER-1. Depress the
purge button before inhaling.
2. Exhale into the mouthpiece.
What is the hand signal for out-of-air? - ANSWER-Flat hand cut across your neck
The thumbs up signal means "OK." True or False? - ANSWER-False
COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 2
, Describe two different ways to indicate "OK". - ANSWER-1. Pointer thumb
touch
2. Fist on your head
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.
Name four different water entries. - ANSWER-1. Giant stride
2. Controlled sated
3. Back roll entry
4. Shore entry
Describe the two emergency out-of-air ascents. - ANSWER-1. Signal out of air
2. Remove regulator, exhale, reach for your buddy's alternate air source.
3. Put in your mouth, purge and breath exchanging "OK" and "Go up" hand
signals.
4. Donor should hold onto the receiver's BCD shoulder strap as you slowly ascend
together.
5. Orally inflate your BCD when you reach the surface.
COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 3
