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Proceedures Flashcards

1
Q

The amount of compressed air required for surface supply is?

A

Enough for two 30 minute emergency dives to fill working depth

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2
Q

The minimum amount of compressed air for surface supplied diving DDC is?

A

Enough compressed air to pressurise both locks to 50 msw, plus sufficient for 3 surface decompressions.

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3
Q

Maximum amount of carbon monoxide is breathing air is?

A

5 PPM

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4
Q

During a surface sufficed supplied dive you lose comms with both divers. What would you do?

A

Send down the standby diver

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5
Q

During a dive the diver informs you he had lost main gas. What would you do?

A

Abort the dive.

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6
Q

What is the function of an enclosed canopy in a wet bell?

A

To provide air pocket for divers incase of loss of main supply

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7
Q

A diver should remain fully dressed during his last deco stop. True or False

A

True

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8
Q

What is the purpose of the mushroom valve on the oral nasal?

A

To allow diver to breathe from the free flow

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9
Q

Under BSEN 12021 how often should an air sample be analysed?

A

3 months
(IMCA 6 months)

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10
Q

Air dive through a moon pool should only proceed if water depth exceeds draft by?

A

10 msw

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11
Q

Umbilical length from hazard should be not less than?

A

5 meters

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12
Q

A superintendent can perform as a diving supervisor when?

A

If he is a qualified dive supervisor, with a letter of appointment and has the dive log has been signed over.

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13
Q

The stand by diver can NOT perform another function during a dive. True or False?

A

True

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14
Q

Oxygen storage areas should be protected by?

A

A fire deluge system.

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15
Q

According to ACOP dive baskets used for surface orientated diving should have?

A

Emergency breathing has cylinders.

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16
Q

Does air dive control require an oxygen analyser to be online to the divers supply?

A

Yes. With high and low alarms

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17
Q

Co2 analysers work by the principal of?

A

Infra red absorption

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18
Q

Nitrogen narcosis usually starts with water depth inexcess of?

A

30 msw

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19
Q

For Offshore dives from 10 to 50 ,msw or any deco diving, where must the chamber be located?

A

Onsite

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20
Q

Minimum number of diver medics is?

A
  1. One dive team member other than the one in the water.
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21
Q

Acute o2 toxicity occurs above what PPo2?

A

2.8

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22
Q

Above what percentage o2 must a gas be treated as 100%?

A

25%

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23
Q

Electrode in under water cutting must be?

A

Negative

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24
Q

A diving basket must carry at least how many divers?

25
There is only one person who can appoint a diving supervisor... who is it?
The diving contractor
26
What's the minimum about of people for surface supplied diving?
5
27
What is the minimum amount of people for a closed bell dive?
9
28
First aid equipment can be identified by?
Red cross on a green background
29
Stand by divers duties are?
To remain at the dive station dressed in, helmet ready, comms and bailout checked and gas online.
30
What alert must a DP operator issue in the event of possible collision?
Yellow.
31
In a diving operation involving ROV which should leave the worksite first?
Diver
32
Imca maximum recommended PPo2 for nitrox diving is?
1.4 bar
33
How much longer should a stand by divers umbilical be?
2 meters
34
To ensure safety during underwater welding or cutting what should there be?
A twin pole knife switch
35
Who is responsible for risk assessments?
The diving contractor
36
A radiation source is measured in?
Curies
37
Working from a DP vessel, what precaution must a diving supervisor take before commencing HP water jetting?
Supervisor informs DPO on bridge
38
Mimimum horizontal separation between a bell and a mooring line should be?
50 meters
39
A smoulder fire is discovered in a DDC. What should you tell the diver to do?
Go on BIBS and try to extinguish the fire
40
What colour is diving quality oxygen?
Black with a white top
41
A diving supervisor is responsible to the contractor for ensuring that...
All equipment is tested He signs divers log books If he dives another appointed supervisor takes over
42
A chamber must have a leak test every?
2.5 years
43
A chamber view port should be discarded after how many years?
10
44
A DP red alert can be caused by
Safe working limits exceeded
45
During a surface supplied dive comms are lost with the diver. What's the first thing to try?
Line pulls to the diver
46
A diver reports his umbilical is snagged. What should you do?
Tell the diver to clear his umbilical
47
Comms are lost to the diver. No response from line pulls... do what?
Change over diver gas supply and send the stand by diver.
48
A depth gauge is calibrated every?
6 months
49
Maximum depth for air or nitrox diving is?
50 msw
50
During a 20 meter dive the client asks if the diver could complete an additional task. What should you do?
Carry out a short TRA, and then if time permits get the diver to complete the task
51
Bailouts should be inspected internally every?
6 months
52
The maximum amount of water vapour allowed in breathing air is?
500 mg/m3
53
During air diving operations you must have at least how much o2 in reserve?
90 m3
54
After handling o2 you shouldn't go near a naked flame for?
30 minutes
55
Prior to connecting a HP whip you should?
Ensure hoses / fittings are rated for the pressure & check for fatigue and cracks.
56
A flashing DP light must be accompanied by?
An audible alarm
57
What is the maximum DP movement at a time?
10 meters in two 5 meter steps
58
What could cause o2 build up during surface deco?
Poorly fitted BIB
59
What is the stand off distance when doing underwater radiography?
8 meters

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