SDI: open water Exam 2025 Questions
and Answers
CH 2 : What is the most important rule in scuba diving? - ANSWER-never hold
your breath
CH 4 : Describe from start to finish the steps to disassembling your scuba system -
ANSWER-- remove accessories and weights
- decompress the system : turn the valve knob completely clockwise, decompress
the second gauges (purge button or auto inflator button to vent air remaining in
the hoses)
- 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
- undo the straps and remove the BCD from the cylinder
- rinse off gear and fill and dump BCD
CH 5 : Describe what to do if you exceed the no-deco time registered on your
computer - ANSWER-- ascend to the surface before you run out of air
COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 1
, - when surfaced , establish positive buoyancy and signal for emergency assistance
- advise the dive supervisor of your omitted decompression and begin first aid
procedures for decompression sickness
- breathe oxygen for at least 30 mins and watch for signs and symptoms of
decompression sickness for at least 24 hours
- seek immediate medical attention if any symptoms develop
- do not dive or fly or go to higher elevations for at least 24 hours
CH 5 : What elements should you and your buddy agree on before the dive? -
ANSWER-- dive time
- maximum depth
- minimum cylinder pressure
- emergency procedures
CH 5 : Define risk management - ANSWER-- a means of preventing problems
and planning a response to any emergency that arises
- involves planning ahead , employing good diving practices and knowing what to
do before an emergency
CH 5 : Why should you avoid consuming drugs or alcohol prior to a dive? -
ANSWER-it greatly increases the risk of decompression sickness in divers
COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 2
and Answers
CH 2 : What is the most important rule in scuba diving? - ANSWER-never hold
your breath
CH 4 : Describe from start to finish the steps to disassembling your scuba system -
ANSWER-- remove accessories and weights
- decompress the system : turn the valve knob completely clockwise, decompress
the second gauges (purge button or auto inflator button to vent air remaining in
the hoses)
- 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
- undo the straps and remove the BCD from the cylinder
- rinse off gear and fill and dump BCD
CH 5 : Describe what to do if you exceed the no-deco time registered on your
computer - ANSWER-- ascend to the surface before you run out of air
COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 1
, - when surfaced , establish positive buoyancy and signal for emergency assistance
- advise the dive supervisor of your omitted decompression and begin first aid
procedures for decompression sickness
- breathe oxygen for at least 30 mins and watch for signs and symptoms of
decompression sickness for at least 24 hours
- seek immediate medical attention if any symptoms develop
- do not dive or fly or go to higher elevations for at least 24 hours
CH 5 : What elements should you and your buddy agree on before the dive? -
ANSWER-- dive time
- maximum depth
- minimum cylinder pressure
- emergency procedures
CH 5 : Define risk management - ANSWER-- a means of preventing problems
and planning a response to any emergency that arises
- involves planning ahead , employing good diving practices and knowing what to
do before an emergency
CH 5 : Why should you avoid consuming drugs or alcohol prior to a dive? -
ANSWER-it greatly increases the risk of decompression sickness in divers
COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 2
