NAUI Master Diver Scuba Final Exam with ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
verified detailed solutions ||\\//|| ||\\//||
DIVE EQUIPMENT Open-circuit demand scuba is most commonly used by recreationals
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
divers, closed-circuit and semi-closed rebreathers now available - correct answer✔✔True
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
DO NOT GET MOISTURE INTO THE CYLINDER. Water will cause corrosion by
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
combining with high pressure oxygen inside the cylinder. - correct answer✔✔True ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
^^ Prolonged storage of air in a steel cylinder containing water can be bad. Oxidation
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
process will consum some of the oxygen in the air, leaving higher nitrogen concentration - ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
correct answer✔✔True ||\\//||
Always keep 300 psi of pressurized air in cylinder to prevent moisture accum. Bad if slosh ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
heard, whitish mist or odor. IF COROSSION IN CYLINDER THIS CAN BE CLEANED BY ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
TUMBLING - so fill it with aluminum oxide chips or abrasive materials and rotate for many ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
hours removing rust - correct answer✔✔True
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
Hydrostatic filled to 5000 psi or five thirds of the rated pressure of the cylinder, fill 300-500 ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
psi per minute - correct answer✔✔True
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Standard on-off cylinder in usa is k-valve, low air warning mech. is j-valve (two sides). This ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
valve lever should be fully up to reserve air if they forget or if diving eliminates that can be
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
turned down but air will release quick without warning - correct answer✔✔True ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
dual valves like Y-valves or H-valves allow diver to mount two regulator systems on single
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
cylinder for deep or enclosed dives - correct answer✔✔True ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
, First stage in regulators reduces cylinder pressure to intermediate or low pressure around
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
90-150 psi - correct answer✔✔True ||\\//|| ||\\//|| ||\\//|| ||\\//||
Upstream valves rare, downstream more resistant to operate as cylinder prerssure decreases ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
b/c failure in closed position. Third valve is balanced valve - correct answer✔✔True
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
First stage includes diaphragm and piston. - correct answer✔✔True
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
Intermediate pressure remains at a constant above ambient pressure as diver descends or ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
acends - correct answer✔✔True ||\\//|| ||\\//|| ||\\//||
the main valve of a pilot valve regulator is opened and clsoed w/ air pressure rather than
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
mechanical leverage - correct answer✔✔True ||\\//|| ||\\//|| ||\\//|| ||\\//||
First stage coloring: green is corrosion, red is rust, black is carbon dust - correct
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
answer✔✔True
Modern regulator performance is defined in terms of maximum resipiratory work level or ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
breathing work - correct answer✔✔True ||\\//|| ||\\//|| ||\\//|| ||\\//||
pressure gauges: surface cylinder pressure gauge to check air in a cylinder above water w/ ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
bleed valve. and sumbmersible - correct answer✔✔True ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
If water is visible in cylinder pressure gauge don't use it till repaired and tested - correct
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
answer✔✔True
Open bourdon gauge least expensive but most problems w/ corrosion - the small one. sealed
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
"" basically the same but more protection. Oil filled "" oil filled case, avoid leaving in sun
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
due to leakage and expansion - correct answer✔✔true
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
verified detailed solutions ||\\//|| ||\\//||
DIVE EQUIPMENT Open-circuit demand scuba is most commonly used by recreationals
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
divers, closed-circuit and semi-closed rebreathers now available - correct answer✔✔True
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
DO NOT GET MOISTURE INTO THE CYLINDER. Water will cause corrosion by
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
combining with high pressure oxygen inside the cylinder. - correct answer✔✔True ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
^^ Prolonged storage of air in a steel cylinder containing water can be bad. Oxidation
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
process will consum some of the oxygen in the air, leaving higher nitrogen concentration - ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
correct answer✔✔True ||\\//||
Always keep 300 psi of pressurized air in cylinder to prevent moisture accum. Bad if slosh ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
heard, whitish mist or odor. IF COROSSION IN CYLINDER THIS CAN BE CLEANED BY ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
TUMBLING - so fill it with aluminum oxide chips or abrasive materials and rotate for many ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
hours removing rust - correct answer✔✔True
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
Hydrostatic filled to 5000 psi or five thirds of the rated pressure of the cylinder, fill 300-500 ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
psi per minute - correct answer✔✔True
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
Standard on-off cylinder in usa is k-valve, low air warning mech. is j-valve (two sides). This ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
valve lever should be fully up to reserve air if they forget or if diving eliminates that can be
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
turned down but air will release quick without warning - correct answer✔✔True ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
dual valves like Y-valves or H-valves allow diver to mount two regulator systems on single
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
cylinder for deep or enclosed dives - correct answer✔✔True ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
, First stage in regulators reduces cylinder pressure to intermediate or low pressure around
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
90-150 psi - correct answer✔✔True ||\\//|| ||\\//|| ||\\//|| ||\\//||
Upstream valves rare, downstream more resistant to operate as cylinder prerssure decreases ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
b/c failure in closed position. Third valve is balanced valve - correct answer✔✔True
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
First stage includes diaphragm and piston. - correct answer✔✔True
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
Intermediate pressure remains at a constant above ambient pressure as diver descends or ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
acends - correct answer✔✔True ||\\//|| ||\\//|| ||\\//||
the main valve of a pilot valve regulator is opened and clsoed w/ air pressure rather than
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
mechanical leverage - correct answer✔✔True ||\\//|| ||\\//|| ||\\//|| ||\\//||
First stage coloring: green is corrosion, red is rust, black is carbon dust - correct
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
answer✔✔True
Modern regulator performance is defined in terms of maximum resipiratory work level or ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
breathing work - correct answer✔✔True ||\\//|| ||\\//|| ||\\//|| ||\\//||
pressure gauges: surface cylinder pressure gauge to check air in a cylinder above water w/ ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
bleed valve. and sumbmersible - correct answer✔✔True ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
If water is visible in cylinder pressure gauge don't use it till repaired and tested - correct
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
answer✔✔True
Open bourdon gauge least expensive but most problems w/ corrosion - the small one. sealed
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
"" basically the same but more protection. Oil filled "" oil filled case, avoid leaving in sun
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
due to leakage and expansion - correct answer✔✔true
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
