BSAC Ocean diver Study Guide Exam
Questions And All Actual Answers.
Elected committee - Answer Diving officer
Training officer
Chairperson
Treasurer
Secretary
Equipment officer
Branches vs BSAC Centre’s - Answer Branches = local club (around 1000 branches around UK
and overseas), BSAC center are training centres i.e. professional diving schools
BSAC organisation structure - Answer BSAC President, BSAC Council, National Diving
Committee, Regional Coaching Team - BSAC council made up of elected members who manage
BSAC for members - NDC members appointed for expertise - all unpaid volunteers
Ocean diver aim - Answer Dive in open water to 20m under supervision of a dive manager in
controlled conditions.
Discovery diver aim - Answer 12m depth under direct in water supervision of a dive leader
BSAC council - Answer committee that manages bsac on behalf of the members
Atmospheric pressure - Answer Weight of 1 cm square column of air is 1 kg at sea level - - i.e.
1 bar at sea level
Water pressure - Answer Water column with area of 1cm2 exerts downwards pressure of 1 bar
for every 10 metres
How to measure water pressure - Answer Depth gauges, gives reading in metres
10m water pressure and total pressure is - Answer 1 bar water pressure and 1 bar atmospheric
,Effect of pressure on air spaces - Answer 2 bar, volume of air is halved. 3 bar reduces to 1 third
original volume. 4 bar reduces to one quarter original volume
Body water content - Answer 80 per cent
Mask - Answer Rigid mask frame
Tempered glass
Flexible seal of silicone rubber
Wash your mask in fresh water after each dive - avoid drying in direct sun as can affect flexibility
of silicone rubber
Fins - Answer Either shoe fin with foot pocket (in warm conditions) or strap fin (over boots,
with strap or spring to keep in place) - wash in fresh water and dry standing on food pocket end
SCUBA acronym - Answer self contained underwater breathing apparatus
Scuba equipment - Answer Cylinder
Buoyancy Compensator
Regulator
Cylinder working pressures - Answer 232/300 bar
Cylinder material - Answer Aluminium/steel
Must conform to PRESSURE EQUIPMENT DIRECTIVE (bears the CE mark)
Type of gas it contains will be written on it
SCUBA cylinder testing - Answer Visual check every 2.5 years
Hydrostatic test every 5 years
Cylinder care - Answer Wash in fresh water
Store cylinder upright
, Marking - WC - Answer how many litres of water the cylinder could hold
WP or CP - Answer Working pressure - 232 bar or 300 bar
TP - Answer Test pressure - used during hydraulic test
CP - Answer Charging pressure
Nitrox cylinders - Answer Need to be in Oxygen service - oxygen compatible parts in valves and
need periodic cleaning to ensure no hydrocarbons present (recommended every 15 months)
A clamp - Answer Makes use of an O ring set into the valve outlet
232 bar pressure
DIN - Answer No o ring
Fitted to cylinders up to 300 bar
Can add on a clamp equipment to allow use of regulators equipped with A-clamp attachment
Not all DIN support all pressure types
M26 - Answer USed above 22% oxygen
BCD components - Answer Integrated gas bladder filled by direct feed which connects via an
Intermediate pressure hose to the regulator - push button to inflate BC
Oral inflation mouth piece
Over inflation pressure relief valves
Also has manually operated dump mechanism
-Washed inside and out with fresh water - disinfecting solutions should be used inside BCD -
should be dry and stored slightly inflated - do not breathe from BC
Regulators - Answer Deliver air at ambient pressure - first stage reduces pressure in cylinder to
Questions And All Actual Answers.
Elected committee - Answer Diving officer
Training officer
Chairperson
Treasurer
Secretary
Equipment officer
Branches vs BSAC Centre’s - Answer Branches = local club (around 1000 branches around UK
and overseas), BSAC center are training centres i.e. professional diving schools
BSAC organisation structure - Answer BSAC President, BSAC Council, National Diving
Committee, Regional Coaching Team - BSAC council made up of elected members who manage
BSAC for members - NDC members appointed for expertise - all unpaid volunteers
Ocean diver aim - Answer Dive in open water to 20m under supervision of a dive manager in
controlled conditions.
Discovery diver aim - Answer 12m depth under direct in water supervision of a dive leader
BSAC council - Answer committee that manages bsac on behalf of the members
Atmospheric pressure - Answer Weight of 1 cm square column of air is 1 kg at sea level - - i.e.
1 bar at sea level
Water pressure - Answer Water column with area of 1cm2 exerts downwards pressure of 1 bar
for every 10 metres
How to measure water pressure - Answer Depth gauges, gives reading in metres
10m water pressure and total pressure is - Answer 1 bar water pressure and 1 bar atmospheric
,Effect of pressure on air spaces - Answer 2 bar, volume of air is halved. 3 bar reduces to 1 third
original volume. 4 bar reduces to one quarter original volume
Body water content - Answer 80 per cent
Mask - Answer Rigid mask frame
Tempered glass
Flexible seal of silicone rubber
Wash your mask in fresh water after each dive - avoid drying in direct sun as can affect flexibility
of silicone rubber
Fins - Answer Either shoe fin with foot pocket (in warm conditions) or strap fin (over boots,
with strap or spring to keep in place) - wash in fresh water and dry standing on food pocket end
SCUBA acronym - Answer self contained underwater breathing apparatus
Scuba equipment - Answer Cylinder
Buoyancy Compensator
Regulator
Cylinder working pressures - Answer 232/300 bar
Cylinder material - Answer Aluminium/steel
Must conform to PRESSURE EQUIPMENT DIRECTIVE (bears the CE mark)
Type of gas it contains will be written on it
SCUBA cylinder testing - Answer Visual check every 2.5 years
Hydrostatic test every 5 years
Cylinder care - Answer Wash in fresh water
Store cylinder upright
, Marking - WC - Answer how many litres of water the cylinder could hold
WP or CP - Answer Working pressure - 232 bar or 300 bar
TP - Answer Test pressure - used during hydraulic test
CP - Answer Charging pressure
Nitrox cylinders - Answer Need to be in Oxygen service - oxygen compatible parts in valves and
need periodic cleaning to ensure no hydrocarbons present (recommended every 15 months)
A clamp - Answer Makes use of an O ring set into the valve outlet
232 bar pressure
DIN - Answer No o ring
Fitted to cylinders up to 300 bar
Can add on a clamp equipment to allow use of regulators equipped with A-clamp attachment
Not all DIN support all pressure types
M26 - Answer USed above 22% oxygen
BCD components - Answer Integrated gas bladder filled by direct feed which connects via an
Intermediate pressure hose to the regulator - push button to inflate BC
Oral inflation mouth piece
Over inflation pressure relief valves
Also has manually operated dump mechanism
-Washed inside and out with fresh water - disinfecting solutions should be used inside BCD -
should be dry and stored slightly inflated - do not breathe from BC
Regulators - Answer Deliver air at ambient pressure - first stage reduces pressure in cylinder to
