UWSH Board

Question 1

What are the 3 types of inspections?

Answer 1

Type 1 - non system specific non invasive
Type 2 - system specific non invasive
Type 3 - system specific invasive

Question 2

What company makes the rubber for the sonar domes and their patches?

Answer 2

BF Goodrich

HP2 Elastilock

Question 3

What are the 3 types of propellers?

Answer 3

Fixed
Built Up
CPP

Question 4

What is an appendage? Name at least 4 appendages on a DDG?

Answer 4

Something that protrudes from the hull underwater.

Strut
Rod meter
Sonar Dome
Scoops

Question 5

Where would you look for info on propellers?

Answer 5

Chapter 3 - Propellers

Chapter 12 - CPP

Question 6

Where is the suction and pressure face of a propeller?

Answer 6

Suction face is forward

Pressure face is aft

Question 7

What is the significance of PDR-40?

Answer 7

PDR-40 is soft blistering caused by corrosion or rusting in the hulls metal leading to the development of gas bubbles.

*The significance is that the hull itself, not just the paint, is showing damage.

Question 8

What is the MFR Scale?

Answer 8

The Marine Fouling Rate is a
0-100 scale in increment of 10

0-30 : slime and sea grass
40-90 : hard growth, tube worms, oysters
100 : composite

Question 9

What are the types of DC Plugs? Which is preferred?

Answer 9

Wooden and Mechanical

Mechanical is preferred because there is no swelling

Question 10

What are the distance requirements for active SONAR?

Answer 10

Helmeted - 3000yds moving into divers comfort

Unhooded - 1000yds moving into divers comfort

Hooded - 600yds moving into divers comfort

Question 11

What are the 3 types of 688 Submarines?

Answer 11

1st Flight = fairwaters, no VLS
2nd Flight = fairwaters, VLS
688i = Bowplanes , VLS

Question 12

What are the prop holes filled with prior to reinstallion?

Answer 12

Hydro Lube

Question 13

What temperature does epoxy fail to cure?

Answer 13

50 degrees

Question 14

What type of hydraulic fluid do we use and what are the operating ranges?

Answer 14

Houghton PR 1192 Petroleum Base

80-120 normal
140 max

Question 15

What is the purpose of the masker emitter belts and where are they located?

Answer 15

They mask the acoustic signature of the ships and are located forward of main machinery spaces on the ship.

Question 16

What are the rules for diving on an active suction?

Answer 16

Considered an emergency repair and is authorized by the CO or both RA and tended vessels.

Question 17

What are the stave bearings made out of?

Answer 17

Synthetic rubber strips, either metallic backed (class I) or non-metallic backed (class III)

Question 18

What DDG’s are honored in NSE?

Answer 18

SAMSON
KIDD
RALPH JOHNSON
MOMSEN 
GRIDLEY

Question 19

What are the requirements of splashing standby diver as a working diver?

Answer 19

1. No-D dive of 60’ or less
2. Same job and location
3. The work area shall be determined to be free of hazards by red diver
4. UWSH or UCT work. Salvage not authorized.
5. The standby diver may deploy outside an enclosed or confined space to tend the working divers.

Question 20

What chapter is seachest repairs in?

Answer 20

S0600-AA-PRO-150 UWSH Manual Chapter 15 protection sleeves and seachests

Question 21

What is the difference between summer and winter bintsuke?

Answer 21

More tallow and rosin

Question 22

How do you know the ICCP is active?

Answer 22

The reference cell will be emitting small bubbles

Question 23

What are the types of underwater welding used in Navy Diving?

Answer 23

Shielded Metal Arc

Question 24

What stave bearing jobs are performed on surface ships?

Answer 24

Level 2 Gross damage and fouling inspection, removal and installing, cleaning

Question 25

What are the two grades of foam we use for cofferdams?

Answer 25

Type 1: 35 feet or shallower | Type 2: 36 feet or deeper

Question 26

What is a SPM propellor called?

Answer 26

Cortnozzle

Question 27

Explain the paint deterioration scale?

Answer 27

Paint Deterioration Rate (PDR) scale is a rating system of paint deterioration from 10-100 in increments of 10

Question 28

What is the Rupert Scale and how is it used in comparing roughness?

Answer 28

Used to measure the roughness of the propeller after cleaning and polishing. The diver compares the blade roughness with with his hand until a match is made.

Question 29

What is the difference between full hull cleaning and interim cleaning?

Answer 29

Full cleaning is the entire hull and interim cleaning refers to the cleaning of propellers, shafts and portions of the hull (running gear)

Question 30

What is a GFI?

Answer 30

Ground Fault Interrupt

Question 31

When is a GFI required?

Answer 31

When line voltage is above 7.5 VAC or 30 VDC

Question 32

What are the UWSH Chapters?

Answer 32

3. Propellers 4. Auxiliary Propulsion Unit 5. Masker Emitter Belt 7. NDT 8. Secondary Propulsion Motor 9. Sonar Domes 10. Diver Tools 12. Controllable Pitch Propellers 13. Shaft Lamination 15. Protection Sleeves 16. Cofferdams 17. Inspections 18. Propulsion Bearings 19. ICCP 20. Painting and Fairing Compounds 24. Fin Stabilizer 28. Pollution Prevention 29. Sub Procedures

Question 33

What are the 3 types of props?

Answer 33

1. Solid (monobloc) 2. Built-Up 3. CPP

Question 34

What is an APU?

Answer 34

Auxiliary Propulsion Unit

Question 35

What is a SPM and what is it used for?

Answer 35

Secondary Propulsion Motor Fine movements

Question 36

Max Protrusion of DC Plugs?

Answer 36

3-4 inches

Question 37

What is a cofferdam?

Answer 37

Any plug, patch or dry chamber installed externally to the hull of the ship or sub below the waterline.

Question 38

What is DFT?

Answer 38

Dry Film Thickness

Question 39

What are 3 types of rudders?

Answer 39

1. Balanced 2. Semi-Balanced 3. Non-Balanced

Question 40

What are 6 types of anchors?

Answer 40

1. NAVMOOR 2. STATO 3. EELLS 4. LWT 5. DANFORTH 6. NAVY STOCKLESS

Question 41

What FR constitutes a prop cleaning?

Answer 41

FR 30