KM 37 UBA

Question 1

What are the 4 major assemblies?

Answer 1

1) Helmet
2) Umbilical
3) EGS
4) Harness

Question 2

What is the helmet made of?

Answer 2

Yellow Fiberglass

Question 3

How much does the helmet weigh?

Answer 3

30.6 lbs

Question 4

What is the face port made of?

Answer 4

1/4” Lexin

Question 5

What type of regulator assembly does the KM-37 have?

Answer 5

Diving System International Navy (Super-Flow 350) demand regulator

Question 6

What is the Dial-A-Breath capable of controlling?

Answer 6

Up to 225 psig of over-bottom pressure

Question 7

What is the purpose of the whiskers?

Answer 7

To carry exhaled gas away from the divers field of vision

Question 8

What is the purpose of the Gas Supply Non-Return Valve?

Answer 8

To prevent a reverse of gas from the helmet to the umbilical

Question 9

What is the purpose of the Low Pressure Port?

Answer 9

Dry suit inflation

Question 10

What are the purposes of the Steady Flow and Gas Train?

Answer 10

1) Defog Faceplate
2) Secondary breathing source if demand regulator fails
3) De-water the helmet
4) Ventilate/Circulate

Question 11

When is EGS mandatory?

Answer 11

Dives deeper than 60’ or when diving in enclosed/confined space

Question 12

What are the EGS requirements when diving with EGS?

Answer 12

An adequatley charged SCUBA cylinder that provides sufficient air to bring the diver to his first deco stop or the surface on a no-deco dive

*K-valve or J-valve with reserve turned down

Question 13

What is the first stage regulator set to?

Answer 13

Manufacturers recommended pressure but no lower than 135 psig over bottom

Question 14

What is the relief set to?

Answer 14

180 +/- 5 psig

Question 15

What must you ensure when connecting the first stage QD?

Answer 15

Turned 180 degrees

Question 16

How long is an umbilical?

Answer 16

600 feet or less

Question 17

What is the I.D. of the gas supply hose in the umbilical?

Answer 17

Minimum of 3/8”

Question 18

What is the I.D. of a pneumofathometer?

Answer 18

1/4”

Question 19

What are the depth limitations for air diving?

Answer 19

Normal - 190”

Max - 285”

Question 20

What are the depth limitations for HeO2 diving?

Answer 20

Normal - 300”

Max - 380”

Question 21

What average sustained flow must the air supply system be able to provide to the diver?

Answer 21

1.4 acfm

Question 22

What does air consumption vary between?

Answer 22

0.75 - 1.5 in the demand mode (regulator)

Question 23

How much acfm is consumed in free flow mode?

Answer 23

Greater than 8 acfm

Question 24

What are the overbottom requirements for the KM-37?

Answer 24

0-60 fsw: 90 min, 135 desirable, 165 max
61-130 fsw: 135 min, 135 desirable, 165 max
131-190 fsw: 165 min, 165 desirable, 165 max

Question 25

When planning a dive, what acfm is used to calculate descent and bottom phase?

Answer 25

1.4 acfm

Question 26

When planning a dive, what acfm is used to calculate ascent and decompression phase?

Answer 26

.75 acfm

Question 27

How much is the umbilical d-ring weight tested to?

Answer 27

500 lbs dead weight

Question 28

What size are the gas supply and pneumo hose fittings?

Answer 28

9/16”

Question 29

What are the to types of umbilical hose assemblies?

Answer 29

1) Rubber

2) Synthetic

Question 30

What is the max life of a rubber breathing gas hose?

Answer 30

12 yrs

Question 31

What is the max life on a synthetic breathing hose?

Answer 31

As long as deemed SAT (no time limit)

Question 32

How much is the breathing and pneumo hose hydro tested to?

Answer 32

200% (twice) the max system operating pressure

*Operating Pressure for breathing air is 250 psi

Question 33

What is the temperature range for storage of the helmet?

Answer 33

0-120 degrees F