Sat Sup - General Knowledge Flashcards
1
Q
What is the recommended ppo2 in a bailout?
A
1.4 max
Or
Bottom mix
Or
0.4 minimum
2
Q
After a heliox sat a diver with no DCI symptoms should not fly for?
A
12 hours <600m
24 hours >600m
3
Q
A diver should not dive after a DCS type 2 for how long?
A
1 week
4
Q
Testing of gas cylinders falls under which British standard?
A
BS 5045
5
Q
Gas manufacturers generally have an accuracy of ____ percent in the minor component of a mix?
A
0.5 %
6
Q
Which gas is heaviest… CO \ CO2 \ H2s or N2?
A
CO2
7
Q
When mixing gas wait how many hours before analysing?
A
6 hours
8
Q
Maximum depth for a surface oriented stand by in the UK is?
A
50 meters
9
Q
Maximum length of a bellman’s umbilical in Norway is?
A
40 meters
10
Q
A skip / half height which is used to deploy a stand-by diver should be large enough for?
A
2 divers with diving equipment
11
Q
The first action a bellman should take when told to lock out to rescue a diver is?
A
Switch to onboard gas
12
Q
Soda like works best when it is?
A
Warm and wet
13
Q
Breathing oxygen should have a purity of?
A
99.5%
14
Q
Helium should have a purity of?
A
99.97%
15
Q
The average 16 cylinder quad weighs?
A
1.5 tons
16
Q
Lifting gear forming part of the diving plant and equipment must be tested to maximum working load every?
A
6 months
17
Q
Bell primary winch brakes should be tested how?
A
Statically
18
Q
Bell secondary brakes should be tested how?
A
Statically
19
Q
Your diver is apparently unconscious, your first action would be to tell the bellman what?
A
Switch to onboard gas
20
Q
Your diver is suffering hypercapnia, what would you advise the bellman to do?
A
Put the diver on BIBs
21
Q
Your bellman has just rescued the diver, who isn’t breathing & has no pulse.
What do you advise the bellman to do first?
A
Give CPR and ventilate the diver
22
Q
The number of DP reference systems that should be in use whilst diving is?
A
2 plus 1 back up
23
Q
A bell 02 ADDS system requires how many litres per hour per person?
A
30 litres
24
Q
A bell lift wire is likely to break due to?
A
Internal corrosion of the wire
25
If the bell internal comms failed, the first action would be to?
Call the diver back to the bell
26
If the bell was entangled on an underwater structure what is your first action?
Slack the main lift wire and umbilical
27
Diving vessels are not required to show diving lights when they are under what length?
12 meters
28
Under AODC guidance notes the diving supervisor may pass over total communications to whom?
Another appointed supervisor, who has signed onto the dive log
29
Divers comms are lost, and the bellman gets a succession of 2 bells on his umbilical - what do you advise the bellman to do?
Switch to on board gas, lock out and investigate
30
A bell 'snub line' should have a SWL of at least?
5 tons
31
AODC recommended bell divers minimum gas supply at depth should be?
30 minutes duration
32
A bell bottom door is not required when?
When internal pressure under seal is greater than sea bed
33
Bell life support should have a minimum duration of?
24 hours
34
A bell ADDS system must be fitted to?
All TUP bells
35
On a DP vessel communications must be provided between?
Dive control and the ships crane
36
In conditions of reduced visibility, the final decision about suitability for diving on DP rest with whom?
The master of the vessel
37
The AODC tapping code for do you have a seal is?
5 taps
38
Underwater welding electrolysis produces what?
Hydrogen
39
Underwater welding cables should be insulated along their whole length, but which area is most important?
All areas along cable to be insulated
40
What is the safe noise level for soft hat divers?
185 db
41
What is the recommended breaking strain of a bell wire?
8 times the SWL
42
The lowering system for diving bells should be controlled by?
The drive system of the winch
43
Secondary bell comms must be by?
Through water comms
44
What are the upper limits for CO2 / oil / CO & water in breathing air under BS EN 12021?
```
CO2 = 500 ppm
CO = 005 ppm
Oil = 0.5 mg
```
Water:
40 to 200 bar 50 mg / M3
>200 bar 35 mg / m3
45
Norwegian emergency breathing rate is?
62.5 litres / minute
46
During a DDC leak test to MWP, what is the maximum leak rate in 24 hours?
1%
47
Bell handling systems should provide mating when?
Under any weather conditions
48
When using a cross hail wire for secondary recovery, the wire must be?
Sufficient strength to lift the bell to the interface
49
Your diver is recovered to the bell with his left thumb missing, and is unconscious, what is your first action?
A Airway
B Breathing
C Circulation
50
In the UK the length of time diving plant can be left without examination prior to diving is?
6 hours
51
Gas contained in a cylinder coloured black with a grey top is?
Nitrogen
52
A chamber view port has a yellowish colour, what would you suspect?
Aging of the view port
53
Liquid oxygen boils at?
183 degrees centigrade
54
Blood and lean muscles hold approximately how much more nitrogen than helium?
2.5 times
55
Expired air contains how much oxygen?
16%
56
When lowering a bell with a side door at atmospheric pressure what should be done with the inner door?
Left open until a hydrostatic seal has been proven on the outer door.
57
When using a bell or stage on a crane hook take what action?
Replace the hook with a shackle
58
If the gas supply to the bell fails for some reason do what?
Switch to onboard gas and recover the bell.
59
If your bell was lost first call who?
Bellman on the through water comms
60
A CO2 analyser works on the principle of?
Infrared absorption.
61
The most common radioactive material offshore is?
IR192
62
CO2 has a molecular weight of?
44
63
Secondary drowning can occur up to how many hours after a near drowning?
72 hours and is a hospital case.
64
What is IMCA DO 18?
Initial and periodic testing plant and equipment
65
Under DO18 topside cylinders require testing how often?
6 monthly external
2.5 year MWP
5 yearly hydraulic test plus the above.
66
How many litres in a cubic foot?
28.32
67
How many FSW in 1 MSW?
3.281
68
What is IMCA D12?
Stainless steel pipework and oxygen.
69
What is IMCA DO50?
Minimum gas requirements
70
What is IMCA DO 6?
Diving around pipelines
71
Greater than how deep is gas heating required?
150 msw
72
1 imperial ton equals?
2240 lbs
73
How many mb of CO2 is allowed in the bell maximum?
20
74
What are the minimum gas requirements for air diving?
```
Sufficient gas for...
2 X 30 minute rescue dives to depth
1 X max treatment depth in chamber (50m)
3 X decompression cycles in the chamber
90 cubic meters of medical oxygen
```
75
What is IMCA DO 07?
Scaffolding
76
Under IMCA DO 07 what is the calculation to work out the minimum allowable horizontal clearance from a scaffolding operation to divers in the water?
1.3 X msw depth = minimum horizontal clearance between scaffolding and diving operations.
77
What is the colour of an argon bottle?
Blue
78
What is the colour of a nitrogen bottle?
Black with a grey top
79
What is the IMCA DO 18 visual inspection schedule for a bailout?
6 monthly internal and internal
80
What is IMCA DO 23?
Design of air diving system.
81
What is IMCA DO24
Design of sat system
82
What is IMCA DO43?
Colour coding of gas cylinders, quads and banks for diving operations.
83
What is IMCA DO15
Scuba replacement
84
Hemoglobin has an affinity to carbon monoxide how many times greater than oxygen?
200 times
85
How many millibars of CO2 can be in a chamber max?
5 millibars
86
What is the DMAC 15?
First aid to be kept on a dive site
87
What is IMCA D11?
Annual audit
88
How many times more does water conduct heat than air?
24 times
89
On a vessel what do the lights Red - White - Red mean?
Restricted movement ability
90
What is the IMCA DO 18?
Initial and periodic examination an testing and certification of diving plant and equipment
91
What is IMCA DO10
Diving from DP vessels
92
How soon can you dive after a type two DCS?
7 days
93
How soon can you dive again after a type 1 bend?
24 hours
94
What is the normal onset of a type two bend?
10 to 20 minutes and up to 3 hours
95
What are the DO50 requirements for saturation diving?
Sufficient gas for...
1) Divers in system to be on BIBs for 4 hours
2) Intended bell runs, plus the same again in reserve (excluding OBG & SPHL)
3) To blow down to intended storage depth and same again in reserve
4) Enough oxygen for metabolic use, make up and deco plus same again in reserve
5) 3 weeks supply of calibration gas
96
What is a maximum single allowable DP movement?
10 meters (in two steps of 5m)
97
What colour is an oxygen bottle?
Black with a white top.
98
What is the maximum single heading change allowed at one time?
15 degrees maximum
99
On a vessel what does a Ball - Diamond - Ball stand for?
Restricted maneuvering capabilities
100
Diver heating from 50 meters is?
Mandatory
101
What documents must be kept in dive control?
1) Company operations manual
2) Company diving manual
3) Safety management system.
102
What is the recommended flow rate for an analyser?
2.5 to 3.5 litres per minute
103
What colour is a calibration gas bottle?
Pink
104
The 3 methods of heat loss are ?
Conduction
Convection
Radiation
105
Helium conducts heat how many more times faster than air?
6 times
106
What is IMCA DO 14?
International code of practice
107
What is the IMCA DO 43?
Marking and colour coding of gas cylinders, quads and banks for diving.
108
What is the daily CO2 metabolic production of a diver in the chamber?
720 litres \ day
109
What is the DMAC 12
sonar and diving operations
110
Under what distance does a joint risk assessment have to be conducted between the diving contractor and seismic surveyor?
30 kilometres
111
Sea water weighs how much per square metre?
1030 kg
112
Sea water weighs how much per cubic foot?
64.38 lbs
113
Fresh water weighs how much per cubic foot?
62.5 lbs
114
How many divisions to IMCA?
4
115
Name the 4 divisions of IMCA
Diving
Marine
ROV
Survey
116
What are the symptoms of a type 2 DCS?
```
Onset within 1 - 3 hours
Pins and needles
Numbness and tingling
Pain around waist
Loss of bladder control
Excessive fatigue
Paralysis
```
117
Describe type 1 DCS
Onset usually in 20 minutes... But can be up to 24 hours
Joint pain
Muscle pain
Skin rash (skin bend)
118
What are the signs of oxygen toxicity
```
Vision (tunnel)
Euphoria
Numbness
Tingling
Irritability
Dizziness
```
119
Describe cause chronic oxygen toxicity
Breathing >27% for a sustained period of time
120
Describe the symptoms of chronic oxygen toxicity
Slow onset and recovery
Dry \ burning cough
Tickle in the throat
Burning sensation in the lungs
121
Describe the symptoms of HPNS
Muscle twitching
Micro sleep
Dizziness
Nausea
122
Describe acute oxygen toxicity
PPO2 >1.6 bar
Fast onset and recovery
Affects brain and spinal cord
123
What is IMCA DO 37?
Surface supplied mixed has diving systems
124
What is the IMCA DO 16?
Lift bags
125
What is the IMCA DO 14?
International Code Of Practice
126
What is the IOGP 411
International Oil & Gas Producers recommended diving practice
127
Hyperthermia is a rise in body temperature of _____ degrees C to over _____?
A rise of 2 degrees from 37 degrees to over 39 degrees centigrade
128
Diver heating from surface to 50m is?
Optional
129
Definition of a raised PPO2 is?
> .6 bar
130
Sounds travels how many times faster in water than air?
4 times (1489 meters / second)
131
What is DMAC 15?
Medical equipment to be held onsie
132
What is BSEN 12021?
British air purity standards
133
Under BSEN 1202 how often should breathing air be tested?
Every 3 months
134
Under IMCA how often should breathing air be tested?
Every 6 months
135
What are the limits of PP02 wet and dry?
1. 4 wet
| 2. 8 Dry
136
DO 18 for cylinders that go under water the testing schedule is?
2 yearly: Internal & external visual inspection
4 yearly: Hydraulic over pressure test plus internal and external visual inspection
137
What are the CO2 limits?
Chamber: 5000 PPM \ .5% SEP
Bell: 20,000 PPM \ 2% SEP
138
Gas consumption rates metric
35 litres \ min normal
40 litres \ min emergency
62.5 litres emergency Norway
BIBs 20 litres \ minute
139
Gas construction rates imperial
1. 25 cubic feet / min normal
1. 5 cubic feet / min emergency
2. 2 cubic feet / min Emergency Norway
140
How many litres / cubic feet?
28.32 litres / cubic feet
141
1 USA ton is how many lbs?
2000 lbs
142
How many cubic feet are in 1 cubic mater
35.32 cubic feet
143
Describe the frame work of the 1974 Health & Safety At Work statutory instruments
SI 2776: Approved codes of practice for diving:
```
Offshore
Onshore
Scientific
Recreational
Military
```
144
What is the flow rate for an O2 analyser?
2.5 litres a minute
145
What is the flow rate for a CO2 analyser?
3.5 litres a minute
146
How many PSI in 1 bar / how many millimetres of Hg?
14.5 psi \ 750 mm Hg
147
What is the Archimedes formula?
Upthrust = volume X density
148
How soon can you dive after a pneumothorax?
28 days
149
How many cubic feet are there in 1 cubic metre?
35.32
150
What is the IMCA DO 21
Diving in contaminated waters
151
Outline the hierarchy of control of risk
Elimination
Substitution
Engineering controls (isolate, enclose, contain, limit)
Administrative controls (policies & procedures)
PPE
152
What are the 5 pathways into the body when diving in contaminated water?
```
Inhalation
Skin contact
Ingestion
Aspiration
Ionising radation
```
153
What is considered a safe distance for radiography under water?
8 meters
* If closer exposure has to be less than 7.5 uSV \ hour
154
What is the half life of IR192?
74 days
155
Use and storage of radioactive material is governed by?
Ionising regulations 2017 & IRR 17
156
In radiography what is an RSO & RPS?
RSO = Radiation Safety Officer (person responsible for the source)
RPS = Radiation Protection Supervisor (normally a trained dive supervisor)
157
At what anaesthetic level will a hyper gas alarm at?
10% of the level to induce anaesthesia
158
How do you calculate the maximum deco limits for divers in sat?
Maximum depth X 1.5 = maximum allowed combined decompression in a given sat.
159
What does the average 64 bottle quad weigh?
6 tons
160
What are the bounce diving requirements under DO50?
1) Enough gas for the planned work + 1 emergency dive to maximum depth
2) Enough to press the DDC to depth twice
3) Enough gas to flush from depth for two decompression cycles
4) Two different LP air sources or one HP source
5) Enough heliox to allow for a treatment saturation and subsequent decompression
161
What are the DO50 requirements for saturation diving?
Enough gas for...
1) All divers to be on BIB's for 4 hours
2) The intended bell runs, plus same again in reserve (excluding SPHL & OBG)
3) Intended storage depth, plus same again in reserve
4) Metabolic / make up & deco, plus the same again in reserve in a separate bank
5) 3 weeks supply of calibration gas
162
What is the normal onset period of a type two bend?
10 - 20 minutes.... And up to 3 hours post dive
163
What are the minimum Manning requirements for closed bell diving?
```
2 Supervisors
2 LSS
2 Techs
2 divers
1 Standby diver
```
9 men in total
164
What are the given timing parameters for closed bell diving?
6 hours maximum in the water
Between 2 to 3 hours in the water before a refreshment break in the bell
Not less than 15 minutes up to 30 minutes with the hat off
8 hours seal to seal
165
Who has to agree to a 28 day extension?
Contractors medical advisor, the divers and the supervisor
166
What are the sat surface intervals in the UK?
10 days or half time of the first sat, which ever is lesser
ie: A 5 day sat would require 2.5 days out
28 days first sat requires 10 days out minimum
Second surface interval to be not less than the duration of the longest last two sats
* Over 200m full time out irrespective
167
Under DO2 & HSE ACOP continuous diving operations require a minimum of how many diving supervisors per shift?
Two
Direct control of operation identified by the supervisor signed into the log
168
Under IMCA DO2\10 at all times the diving supervisor shall have control of the blow down.
True or False?
True
169
Describe the emergency gas requirements for closed bell diving
1) Enough gas to support each diver, plus bellman, outside the bell for a minimum of 30 minutes @ 40 litres a minute at the maximum depth o the operation.
2) Sufficient O2 for metabolic consumption, X the number of divers, for 24 hours timed from the end of the bellrun.
170
What frequency do the bell transponders work on?
Channel A?
Channel B?
Channel A: 38.5 kHz
Channel B: 39.5 kHz
171
What are the minimum emergency valve connections for closed bell diving?
1) Hot water
| 2) Breathing gas
172
What are the through water communications methods?
Primary?
Secondary?
Tertiary?
```
Primary = Through water comms
Secondary = Sound powered phone
Tertiary = Tapping code
```
173
What are the two options for stranded bell?
1) Thru water transfer
| 2) Diver or ROV intervention
174
What is the HSE UK ACOP Regulation # 9
1 Only one supervisor to be in control of the blow down at one time
175
Describe how a bell winch should be powered?
Should have a main & secondary winch motor and a back up power supply for each
176
What must a bell handling system do?
1) Lock on & off the system
2) Lower safely through the splash zone without undue spinning
3) Position and maintain the bell at the working depth
4) Allow the bell to be safely recovered to deck
5) Locate the bell accurately even in heavy sea onto the trunking
177
What are the main elements of a bell handling system?
1) A frame
2) Winch main cable and guide wires
3) Umbilical handling system
4) Heave comp
5) Cross haul system
6) Secondary recovery system
178
What are the 5 means of communication with lost comms to the bell?
1) Sound powered phone
2) Through water comms
3) Flashing bell lights
4) Hand signals to camera
5) Tapping codes
179
What are the 4 means of gaining a divers attention in lost comms to the diver?
1) Umbilical pulls
2) Flashing hat light
3) ROV lights
4) Pneumo signals
180
What do you do if not water is lost to your bell?
Switch to a back up system and recover the bell
181
What do you do when your sat diver loses gas?
1) Diver goes onto bailout
2) Supervisor to change to back supply and inform the diver
3) Switch over to OBG supply
4) Free flow the divers Pneumo
5) Lock in the diver take a seal and recover the bell
6) Investigate the cause of the lost gas situation
182
What is the recommended PPO2 in a diving mix according to DO22
0.6 to 0.9 bar
183
What is the recommended PPO2 in a chamber according DO22
0.4 PPO2
184
What are the actions for a bellman for an unconscious diver?
1) Switch to onboard gas
2) Deploy the man lift
3) Lockout and follow the divers umbilical
4) Check divers breathing and BoB supply
5) Recover the diver back to the bell
185
A Dreger tube that reads N = 10 is a a surface reading tube, and is not used in the bell
True or false?
True
186
What are the CO2 limits in the bell?
PPM \ % \ PPco2
20,000 PPM \ 2% \ 0.02
187
What are the PPco2 limits for the chamber?
5000 PPM \ 0.5 % \ 0.005 PPco2
