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BIBS Study > Bibs Study (previous test questions) > Flashcards

Bibs Study (previous test questions) Flashcards

1
Q

What UWSH Chapter is Stern tube seals covered in?

A

Ch 16

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2
Q

What is needed to conduct free ascent training?

A

A fully qualified instructor, a recompression chamber available within 5 mins, DMT on station, and a UMO is available to conduct immediate response to a mishap. -USN Dive man 6-2.1.11

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3
Q

What is the minimum positive clearance needed for aircraft carriers from the vessel to the pier?

A

20ft

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4
Q

What pressure do you start with on the intensifier to stretch Morgrip bolts 0.006 to 0.008?

A

35,000psi

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5
Q

If you have not reached .006” on the Morgrip bolt, what pressure do you try next and what pressure can you not exceed?

A

Continually increase the pressure in increments of 500psi from the initial 35,000psi to obtain the 0.006-0.008 stretch. Do not exceed 37,500psi.

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6
Q

What is some criteria for wire rope replacement?

A

-Six broken wires in one rope lay length, or three broken wires in one strand lay length.
- Exceeding 5 yr service life
Man-010 Appendix

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7
Q

What is the most common failure of Dynamic Positioning systems?

A

The most common causes of DP casualties are loss of position reference systems or operator error. The most common results of DP casualties are drive off or drift off (loss power). USN Dive man 2D-2.4.11

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8
Q

What action should you take if you have a NDC failure?

A

If in a No D status, abort dive NTE 30fpm. If unsure of D status, the diver/s must weigh the risk of DCS from surfacing. Divers should be observed on surface for 1 hr.

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9
Q

What is the net buoyancy of a salvage pontoon?

A

80 to 90 tons

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10
Q

What is a Partial arc bearing and what subs have them?

A

A new stern tube and propeller bearing designed for the SSN 21 and SSN 774 Class submarine. This bearing uses two large bearing pads instead of staves to support the shaft.

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11
Q

What is the minimum distance between a vessel and the pier?

A

4 ft

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12
Q

What is the most efficient way to vent the chamber with air conservation in mind?

A

Continuous ventilation is the most efficient method of ventilation in terms of the amount of air required

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13
Q

What is the normal operating depth and time for SS mixed gas dives?

A

300’ for :30

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14
Q

What NSTM is for O2 cleanliness?

A

MIL-STD-1330

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15
Q

What is a Successive MK25 O2 dive?

A

A successive oxygen dive is one that follows a previous oxygen dive after an Off-Oxygen Interval of less than 2 hours.

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16
Q

How far out do you inspect the dielectric shield?

A

Inspect the immediate hull out to a distance of 20ft

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17
Q

What NSTM is gas free covered in?

A

NSTM 074

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18
Q

Which form is attached to a RFI propeller?

A

NAVSEA form 9245/1

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19
Q

What is the disadvantage of using Steel tubular electrodes?

A

-Burn time is short.
-Produces narrow gap that is hard to see
-Welding machine is required
-deterioates electrode holder more rapidly.

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20
Q

How much time is needed for gases to homogenize for mixing gases?

A

Allow the cylinders to stand for at least SIX hours to permit the gases to mix homogeneously

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21
Q

What type of wreck disposal is not recommended during peacetime?

A

Wreck burial

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22
Q

What is done with vessel that have no remaining value?

A

They will be scuttled by re-floating and moving to designated area.

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23
Q

What is the max operating depth of the TRCS?

A

165FSW

24
Q

What is the descent rate for pressure candidate test?

A

75fpm or less. Aviation candidates shall be limited to a maximum of 10fpm.

25
Q

What must be done if popping (minature Oxygen bubbles exploding) is occurring during Cutting or welding?

A

Cutting and Welding must stop and the cause must be investigated.

26
Q

How do you heat hydraulic fluids?

A

-start unit with no tools connected, set relief valve to max pressure, observe temp.
-Use a dipstick heater in the reservoir
-Install flex electrical heating panel on reservoir

27
Q

Middle ear pressure on ascent, divers face starts to droop?

A

Baroparesis

28
Q

What is the maximum water-jet pressure on painted surfaces for hull cleanings?

A

2000psi

29
Q

What is the oxygen purity standard for cutting and welding?

A

99.5%

30
Q

CNS O2 Tox usually occurs at what ATA in a wet/dry Diver?

A

1.3=wet / 2.4=dry

31
Q

What is the minimum depth below the keel to conduct hull cleanings?

A

Minimum of 6fsw @ Mean Low Water

32
Q

Who can extend system certification on a Chamber?

A

SCA may extend certifications for short durations (normally up to 90 days)

33
Q

What is the OBLISERV for MDV?

A

36 months.

34
Q

How many swing bolts are on a SSGN DDS hanger door?

A

18

35
Q

Instruments that are used in mixed gas diving shall be with in what accuracy parameters?

A

+/- 0.5%

36
Q

When bottom mix is less than 16% what must your EGS % be?

A

15-17%

37
Q

For Mk-16 1.3 HEO2 dives, how much time can you dive in a single day and total in a week due to the possible onset of Pul O2 Tox?

A

-Limit 1.3 ata dives to a max of 4 hours a day
-Max 16 hours a week
- If pulmonary SX occur, must be SX free for 24hrs before diving again.

38
Q

What is the testing criteria for a Divers handling system STATIC load test?

A

Static load test shall be 200% of the operational load, and shall be held for ten minutes by the brake without power to the system.

39
Q

Who shall be notified if a chamber system is operated outside of its operational limits?

A

Any violation shall be immediately reported to the SCA, stating the cause or justification.

40
Q

A temporary transfer of custody of a Chamber system shall be no longer than how may days. If it does go over the allotted days, who shall be notified?

A
  • Three months (90 days)
  • If the temporary custody is longer than 90 days the SCA Shall be notified.
41
Q

What is system cert survey card 1A?

A

Corrective action must be accomplished prior to manned use of the system. For a diving system that has already been certified, the issuance of a Category IA SCSC shall result in either the termination or suspension of the existing certification. Prior to further manned use of the system, full recertification, or removal of the suspension by the SCA is required.

42
Q

What is system cert survey Card 1B?

A

Corrective action must be accomplished prior to system certification. Category IB SCSCs are issued to uncertified systems or previously certified systems for which certification has been terminated or suspended.

43
Q

What is system cert survey Card 1C?

A

Corrective action must be accomplished prior to the date or event specified on the card to sustain certification. Certification or continuation of certification may be granted in the intervening time period.

44
Q

What is system cert survey Card 1D?

A

Corrective action must be accomplished on a specified component prior to its use, but the overall system retains its certification. Some limitation may be placed on the operational parameters of the existing certification, such as reducing the maximum depth or the number of divers, until the card is cleared.

45
Q

What is system Cert survey Card Category II?

A

Corrective action is desirable, but not mandatory.

46
Q

What is system cert survey Card ANU?

A

Corrective action is reported to the SCA and filed with the ANU Coordinator for updates and/or examination of the ANU related item.

47
Q

What is the maximum altitude to Navy Dive Computers?

A

15,000ft above mean sea level.

48
Q

What is the MK-16 normal working limit depths for N2O2 and HEO2? What is max for N2O2?

A

N2O2- 150 / Max is 190fsw.
HEO2- 300

49
Q

What is the Floodable volume and standard Cuft when charged to 3000psi of an MK16 O2 and Dil bottle?

A

Floodable volume - .101ft3
Standard Cubic Ft when charged to 3000psi- 21.

50
Q

What category of contaminated water can a MK-16 be dove in?

A

CAT 3

51
Q

Chain Stopper holds how much weight?

A

Chain stoppers are designed to bear only 60% of the breaking strength of the chain.

52
Q

Which ballast tank is the SPM located in on a 774 Sub?

A

4A STBD side

53
Q

Max Stay time at 225’ on a TT8?

A

:30

54
Q

Minimum time spent at 60 on a TT7?

A

12 hours, unless overriding circumstances dictate earlier decompression.

55
Q

How do you check grates on Subs for noise inspections?

A

attempt to physically shake each grate using a pry bar or similar tool

56
Q

What gas does the GEOTECH analyze in the DDS?

A

Monitor CO2 levels every 30 minutes using GEOTECH monitor as primary instrument with CAMS as backup during DDS operations

BIBS Study (29 decks)

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