SCUBA OPERATIONS

Question 1

normal working limit for SCUBA

Answer 1

130 ft

Question 2

maximum working limit for SCUBA

Answer 2

190 ft

Question 3

SCUBA decompression dives may be made only when considered absolutely necessary and authorized by the ____ or ____

Answer 3

CO or OIC

Question 4

most common SCUBA casualty is _________

Answer 4

drowning

Question 5

maximum current for SCUBA

Answer 5

1 knot

Question 6

currents greater than __ knot require _________

Answer 6

• 1 knot

- ORM analysis

Question 7

which instruction lists the equipment authorized for Navy use in SCUBA?

Answer 7

NAVSEA 00C INST 10560.2 series

Question 8

what is the working pressure of a steel 72?

Answer 8

2250 psig

Question 9

what is the working pressure of an aluminum 80?

Answer 9

3000 psig

Question 10

what is the volume of a steel 72?

Answer 10

64.7 scf @ 2250 psig

Question 11

what is the volume of an aluminum 80?

Answer 11

81.85 scf @ 3000 psig

Question 12

per the DOT cylinders are tested every __ years to ___x the working pressure

Answer 12

• every 5 years

- 1 2/3x the working pressure

Question 13

how often are cylinders to be inspected?

Answer 13

annually

Question 14

what is the K valve?

Answer 14

valve on manifold that has NO reserve mechanism / reserve air

Question 15

what is the J valve?

Answer 15

valve on manifold that contains reserve valve mechanism

• gives warning of low air supply
• provides diver with reserve air to surface safely
• holds back a minimum of 500 psi

Question 16

when should the reserve valve be DOWN?

Answer 16

• breathing on reserve
• charging cylinders
• gauging cylinders

Question 17

what type of suit is recommended for temperatures below 40 F?

Answer 17

variable volume dry suit

Question 18

life preserver / BC is mandatory except when ________

Answer 18

under ice

Question 19

buoyancy compensators must have ___ lbs positive lift at max depth

Answer 19

10 lbs

Question 20

cylinder pressure gauges are calibrated every ____

Answer 20

18 months

Question 21

minimum personnel for single SCUBA diver (tended):

Answer 21

4:
- diving supervisor
- diver
- diver tender
- standby diver