SDI Open Water Questions And Answers With
Verified Solutions
Describe all the steps to assemble a BCD and regulator to a scuba cylinder. ANS 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? ANS
You lift up by the BCD and gently shake it.
What is the purpose of streamlining your hoses and accessories? ANS So they don't get tangled/
in the way.
Describe from the start to finish the steps to disassemble your scuba system. ANS 1. Remove
accessories and weights
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.* ANS 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? ANS 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. ANS 1. Depress the purge button before
inhaling.
, 2. Exhale into the mouthpiece.
What is the hand signal for out-of-air? ANS Flat hand cut across your neck
The thumbs up signal means "OK." True or False? ANS False
Describe two different ways to indicate "OK". ANS 1. Pointer thumb touch
2. Fist on your head
Describe how to perform a giant stride entry off a boat. ANS 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. ANS 1. Giant stride
2. Controlled sated
3. Back roll entry
4. Shore entry
Describe the two emergency out-of-air ascents. ANS 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.
1. Signal out of air
2. Donor grabs buddy, takes a breath, and gives buddy regulator.
3. Receiver purges and takes 2 breaths and passes it back.
4. Donor keeps hand on the hose and they both go up repeating steps 2-3.
Verified Solutions
Describe all the steps to assemble a BCD and regulator to a scuba cylinder. ANS 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? ANS
You lift up by the BCD and gently shake it.
What is the purpose of streamlining your hoses and accessories? ANS So they don't get tangled/
in the way.
Describe from the start to finish the steps to disassemble your scuba system. ANS 1. Remove
accessories and weights
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.* ANS 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? ANS 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. ANS 1. Depress the purge button before
inhaling.
, 2. Exhale into the mouthpiece.
What is the hand signal for out-of-air? ANS Flat hand cut across your neck
The thumbs up signal means "OK." True or False? ANS False
Describe two different ways to indicate "OK". ANS 1. Pointer thumb touch
2. Fist on your head
Describe how to perform a giant stride entry off a boat. ANS 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. ANS 1. Giant stride
2. Controlled sated
3. Back roll entry
4. Shore entry
Describe the two emergency out-of-air ascents. ANS 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.
1. Signal out of air
2. Donor grabs buddy, takes a breath, and gives buddy regulator.
3. Receiver purges and takes 2 breaths and passes it back.
4. Donor keeps hand on the hose and they both go up repeating steps 2-3.
