Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
18 Cards in this Set
- Front
- Back
|
__________ scuba is normally deployed in operations not requiring decompression.
|
open-circuit scuba
|
|
|
Decompression diving using _________ air SCUBA may be used if no other option exists and only with the permission of the CO or OIC.
|
open-circuit
|
|
|
___________ UBA is the preferred method of performing SCUBA decompression dives.
|
closed-circuit
|
|
|
the basic open-circuit scuba components are:
- demand regulator assembly - one or more air cylinders - __________________________ - backpack or harness |
- cylinder valve and manifold assembly
|
|
|
_________ is the central component of the open-circuit system. The regulator delivers air to the diver after reducing the ___________ in the cylinder to a pressure that can be used by the diver.
|
- demand regulator assembly
- high-pressure air |
|
|
In the regulator's __________, high pressure air from the cylinder passes through a regulator that reduces the pressure of the air to a predetermined level over ambient pressure.
|
First Stage
|
|
|
In the event of excessive pressure buildup the cylinder valve contains a high-pressure ______________.
|
blowout plug/safety disc plug
|
|
|
_________ & manifolds make up the system that passes the high-pressure air from the cylinders the ____________ regulator.
|
- Cylinder valves
- first stage |
|
|
A cylinder valve with an air reserve or __________ is preferred.
When a cylinder valve without an air reserve or __________ is used, a __________ is required. |
- J valve
- K valve - submersible pressure guage |
|
|
A dive must be aborted when the cylinder pressure reaches _____ psi for a single cylinder or _____ psi for twin manifold cylinders.
|
- 500 psi
- 250 psi |
|
|
The air reserve mechanism caontains a _________ check valve.
|
- spring loaded
|
|
|
The reserve valve must be down when:
- ____________ - guaging cylinders - ____________ |
- charging cylinders
- breathing on reserve |
|
|
________ - preferred type, day or night, signal lasts appx 45 seconds, depth 200 fsw, satisfies magnetic effect limits for EOD usage
________ - day time distress signaling ________ - night time distress signaling |
- MK 99 MOD 3
- MK 131 MOD 0 - MK 132 MOD 0 |
|
|
The three basic types of lifelines are:
- tending line - ____________ - ____________ |
- float line
- buddy line |
|
|
When direct access to the surface is not available a ________ line is mandatory.
The ________ line reaches from the diver to a suitable float on the surface. A buddy line is ___________ feet long and is used to connect divers at night or low visibility. |
- tending line
- float line - 6 to 10 |
|
|
Submersible cylinder pressure gauges should be calibrated every _________ months.
|
- 18 months
|
|
|
scuba cylinders are charged by one of two accepted methods:
- cascading - _________ The fastest and most efficient method for charging scuba tanks is _____________. |
- high-pressure air compressor
- cascading |
|
|
the charging rate for wet/submerged cylinders is ________ psig per minute.
the charging rate for dry cylinders must not exceed _________ psig per minute. |
- 400 psig
- 200 psig |
