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Trainee Bell Dive Supervisors > Class Questions > Flashcards

Class Questions Flashcards

1
Q

Every piece of documentation may be regarded as a legal document

A

True

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2
Q

Recording of diving communications should be kept for a minimum time and should include information on?

A

48 hours minimum and include equipment and personnel checks
HSE ACOP 1997
IMCA D014 (states 24 hours)

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3
Q

The contractor requests an increased amount of lift bags to a project procedure for the installation of a spool. Do you need a new risk assessment?

A

Yes you need to fill in a CRF(change request form) and produce an MOC which will include a new lift plans and risk assessment

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4
Q

The contractor is responsible for producing a updated Risk Assessment, which would be then signed off and replace the original Risk Assessment

A

True

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5
Q

What is a safe level of CO2

A

2500ppm

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6
Q

At what level does H2S produce symptoms?

A

10ppm

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7
Q

Above what % Oxygen should be handled as 100%

A

25%

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8
Q

Can O2 and Nitrogen cylinders be stored together

A

NO!
Cylinder colours are too similar

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9
Q

Paramagnetism is used to analyse

A

Oxygen

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10
Q

What is used to analyse carbon dioxide

A

Infared

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11
Q

When calibrating a gauge what is rule of thumb

A

Follow Manufacturers instructions

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12
Q

How much soda sorb is calculated per diver per day

A

6kgs/ Diver/ Day regardless of depth

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13
Q

Soda lime absorbs

A

20-30% of its weight in CO2
(1kg =120g of CO2)

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14
Q

Composition of Soda Lime

A

80% Calcium Hydroxide
5% Sodium and Potassium Hydroxide
15% Water

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15
Q

What level of PPO2 is normal for a saturation environment?

A

350-450ppm

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16
Q

What level of ppCO2 is normal for a saturation environment?

A

<5000ppm

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17
Q

What is the normal temperature range for a saturation environment?

A

28-34°C

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18
Q

How much soda sorb will be required for a 70msw saturation for 12 days including deco for 10 divers?

A

720kgs (6kgs/diver/day)

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19
Q

Who has the legal responsibility for TUP?

A

On shift Supervisor
IMCA DO22 Rev 1 13.7

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20
Q

How much soda lime for 28 day Sat including deco for 24 divers?

A

6kg/day x 28 days x 24 divers
=4032kgs
IMCA DO22 Rev 1 2.36

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21
Q

During a decompression diver reports flicking eyes, feels unwell. What could be the cause?

A

Nystagmus. Acute Neurological DCI

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22
Q

What is the max recommended O2% in a chamber?

A

25% O2
IMCA D014 Rev 1 4.6.5

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23
Q

Bellman reports the CO2 level is 2480ppm in the bell at 90m.
What is the %

A

2486 divided by 10000= 0.2480%

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24
Q

Following surfacing a diver complains of feeling weak and fatigued, what could he be suffering from?

A

Acute neurological DCI

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25
Q

How often should a dive project risk assessment be reviewed to check the need for revision?

A

At regular intervals

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26
Q

A DSV is on DP in a Scottish Loch. Water depth 200 msw, divers are at 25m. Which diving Reg/ ACOP covers this operation and why

A

Offshore Diving Reg because the vessel is on DP.

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27
Q

What is the minimum surface visibility considered safe for DP

A

Decided by Master and Dive Supervisor.
IMCA DO14 Rev 1 7.3.7
IMCA D022 Rev 1 4.8

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28
Q

How long should the vessel hold position on DP before diving operations commence?

A

30 minutes

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29
Q

The main gas umbilical supply on the bell for the diver must be fitted with a ?

A

Non return valve

30
Q

An imminent gale warning is?

A

6 Hours
IMCA DO22 Rev1 Appendix 3

31
Q

What is the colour of a CO2 cylinder?

A

Black cylinder body grey neck

32
Q

A smoldering chamber fire

A

Divers on Bibs and attempt to extinguish

33
Q

Following a successful therapeutic treatment a diver should not fly for

A

48 hours
DMAC 13 & 07

34
Q

Who is legally responsible for the TUP

A

On Shift Supervisor
TUP IMCA D022 Rev 1 13.7

35
Q

Pulmonary O2 Toxicity may occur when the PPO2 exceeds-

A

0.6ATA

36
Q

During a dive, the diver complains on sweating, nausea, headaches and is breathing rapidly. He is suffering from-

A

CO2 poisoning

37
Q

A blocked Eustachian tube will cause?

A

Aural Barotrauma

38
Q

Metabolic O2 consumption is related to CO2 production. What is the ratio?

A

1:1

39
Q

Which physical areas does the ACOP apply to?

A

From 12 nautical miles from the low water limit to the limit of UK designated areas of the continental shelf

40
Q

Breakage in the bell umbilical can be indicated by?

A

Loss of camera, main gas, depth indication, comms, heating supply

41
Q

A SPHL must be able to maintain life support for a minimum period of?

A

72 hours
IMCA DO52 Hyperbaric Evacuation Systems

42
Q

IMCA DO14 states that depth gauges are to be tested and certified every:

A

6 months
Also read D018

43
Q

A supervisor needs to have been a qualified diver unless:

A

He was supervising for a 2 year period prior to 1981
ACOP Reg 9, par 163( Grandfather Clause)

44
Q

When recovering a bell from a saturation dive, the winch operator should observe?

A

The wire spooling onto the drum

45
Q

What is considered the upper limit for current in diving operations?

A

1.5knots
IMCA D067 for revised maximum currents

46
Q

Where should the divers pneumo hose be located?

A

Accessible at chest level

47
Q

Bell handling system should provide.

A

Easy and firm mating to and from the chamber

48
Q

A helmets main gas is checked how

A

Bail out bottle open, emergency valve closed and divers supply panel valve open

49
Q

Is granulated sugar allowed in a chamber

A

No

50
Q

The recommended bell divers minimum onboard gas supply should last how long for the working depth

A

30 minutes minimum

51
Q

How much soda sorb is used by a diver per day

A

6kgs /diver/ day regardless of depth

52
Q

What is the recommended maximum O2 allowed in a chamber during decompression?

A

25%
IMCA D014
O2 above 25% is treated as pure O2

53
Q

The medical lock interlock is faulty what should you do

A

Report it to the LSS and Dive tech do not use until repaired

54
Q

Is the South African Class IV dive ticket accepted by HSE

A

No
HSE regs 1997
List of approved tickets 1 Dec 2021

55
Q

If the main gas supply to the bell failed what would your actions be?

A

Panel should automatically change to onboards. Bellman should see this in drop on main gas up stream supply gauge. Recover divers to bell

56
Q

What is the maximum depth you would administer 100% O2

A

18msw
This is 2.8bar and is legally the highest you can give
Table 6(RNT62)

57
Q

When putting a gas quad on line what is the procedure?

A

Open all cylinder valve fully open and half a turn back. Then open the king valve all the way and half turn back

58
Q

Offshore diving communications should be recorded until when

A

Until the diver returns to where he started the dive

59
Q

Only the minimum required gas is onboard to carry out a dive. What would you do?

A

All diving stopped until gas stocks replenished
ACOP para 61

60
Q

DMAC recommended PPO2 in a bailout bottle is

A

1.4bar

61
Q

Your bell diver is suffering from Hypercapnia what would you do.

A

Put the diver on BIBS

62
Q

How much soda lime is required for a saturation dive to 70msw for 10 days including deco for 12 divers?

A

6kg/day/diver x10 x12=720kg

63
Q

Umbilicals must be tested to their max working pressure every

A

2 years
IMCA D018 section 28

64
Q

Lift Bag Saftety factor

A

5:1

65
Q

Lift Bags are load tested every

A

12 months

66
Q

Lift Bag visual inspection is done every

A

6 months

67
Q

Webbing slings have a safety factor of

A

7:1

68
Q

SMS stands for

A

Safety Management System

69
Q

TRA stands for

A

Task Risk Assessment

70
Q

Describe a Near Miss

A

A load transferred from the vessel to the quayside was found to have had a loose shackle resting ontop of the load that could have fallen off.

71
Q

An Observation is,

A

Something is see, a loose shackle was seen laying ontop of a load that was being rigged to lift. And was removed

Trainee Bell Dive Supervisors (7 decks)

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