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IMCA BELL SUPERVISOR > ACOP > Flashcards

ACOP Flashcards

1
Q

What are ACOP,s

A

Approved codes of practice which are approved by the HSC ( health and safety commission) and gives advice on how to comply with the law.

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2
Q

Are they the actual regulations

A

No just a guide

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3
Q

Are these the same as IMCA,s

A

No

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4
Q

What are the regulations called

A

Diving at work regulations 1997 ( SI 1997 no 2776

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5
Q

When did they come into force

A

1st of April 1998

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6
Q

HSE memos on diving stopped when

A

When the DAW 1997 came into play

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7
Q

What are further HSE memos called

A

Diving information sheets ( DVIS )

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8
Q

How many regulations are there that cover diving at work

A

Five including this

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9
Q

In the guide what do the italics represent

A

The regulations

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10
Q

What does the bold text represent

A

The ACOP information

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11
Q

What does * mean next to text

A

That the technical guidance is listed in annex 5

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12
Q

If you comply with the regulations are you in line with the law

A

Not necessarily you may have other laws to consider

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13
Q

The regulations are set under what law

A

The health and safety work act 1974 ( the HSW act )

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14
Q

Who wrote the ACOP,s code

A

The IMCA reps working with the HSE

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15
Q

Where does this code apply

A
  1. On offshore installations and pipelines wells and mines which are in uk waters outside the 12 mile limit.
  2. On offshore installations and pipelines within the 12 mile limit.
  3. Where closed bell and saturation diving is done.
  4. When on DP
  5. All dives below 50m,s unless
    A. Media diving projects
    B. Recreational diving projects
    C. Scientific and archeological diving projects
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16
Q

What is the 12 mile limit

A

A distance of 12 nautical miles from the lower water line

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17
Q

What are the other 4 codes that cover diving at work

A
  1. Commercial diving projects inland/inshore.
  2. Media diving projects
  3. Recreational diving projects
  4. Scientific and archeological diving projects
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18
Q

This code does not cover techniques to reduce risks so what does

A

AODC , IMCA , DVIS and DMAC guides

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19
Q

When referring to these guides what must you check

A

That they are up to date

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20
Q

A diver is classified as what

A

A person in water or liquid or in a chamber at a pressure of 100mb and breathes gas or air greater than atm pressure to survive.

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21
Q

Are clean rooms or submersible crafts at an internal pressure of 100mb above atm press covered by the diving regs

A

No

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22
Q

An activity made up of one or more diving operations from the time you start to prepare to the end of decompression or any therapeutic recompression or leaves the water plus the time he has to stay next to the chamber, is called what

A

A diving project

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23
Q

A dive or dives that can be safely supervised by one person is called what

A

A diving operation

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24
Q

Who has the main responsibility in a diving project

A

The diving contractor

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25
Q

A supervisor should not do a diving operation for what reasons

A

If he thinks it is unsafe or is too big for one man to run

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26
Q

What does the 1995 order refer to

A

The HSW act 1974

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27
Q

If you have had a diving accident and are in transit to a hospital or in a hospital ard you covered by the regulations

A

No

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28
Q

If you are in a hyperbaric chamber in a hospital do they cover you

A

No

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29
Q

If you are treated in a private hyperbaric chamber are you covered

A

No

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30
Q

Are people like Caisson workers who work in an air pressurized system covered

A

No

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31
Q

Can you have more than one diving contractor for the same project

A

No

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32
Q

What other people are responsible for the well being of persons in a dive team but not including the dive team

A
  1. The client
  2. The principle contractor
  3. The manager of the offshore installation
  4. A consultant for the client etc
  5. The master of the vessel
  6. The superintendent
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33
Q

Does the DP operator have to inform the dive supervisor before any moves

A

Yes

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34
Q

Name other persons who have a responsibility to you for safe working

A

Crane operator, maintainance persons and riggers

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35
Q

Can the client employ 10 independent self employed divers

A

Yes but it must be agreed in writing who is the designated diving contractor

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36
Q

When this is the case what must be done

A
  1. The name of the diving contractor to be entered in all project records.
  2. All other persons in the vicinity or Involved in the project notified in writing of the contractor
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37
Q

What must you provide HSE with before you act as a diving contractor

A
  1. Name address and tel no
  2. Legal status ( limited company etc )
  3. Name and address and no of contact if different from 1.
  4. Sig & full name of person supplying info.
  5. Date when info supplied
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38
Q

In the ACOP for commercial diving projects offshore it refers to the information in the previous question that it is in schedule 1. Where is this schedule

A

In the back of the diving at work regulations 1997. ( SI 1977 No2776)

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39
Q

Before a diving contractor starts a project he must produce what

A

A diving project plan it must be updated as necessary

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40
Q

Before the start of a diving operation within the plan what must be done

A
  1. Appoint a supervisor to run the operation.
  2. Supply that person as soon as possible with a letter of appointment.
  3. Supply that person with a copy of the project plan.
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41
Q

Who is responsible for ensuring a risk assessment is carried out

A

The diving contractor

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42
Q

In a risk assessment what must be taken into consideration

A
  1. It must identify site specific risks and hazards
  2. It must be reviewed at regular intervals.
  3. Risks assessed under the HSW regulations 1992 if not assessed under the diving regs
  4. Take in the risk to the public
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43
Q

The project plan in respect of the risk assessment must show what ?

A

C.G.R.I.D

  1. How they are controlled
  2. May have generic risk assessment
  3. Show the date of the assessment
  4. Show any instructions and planning
  5. Show a procedure for reviews
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44
Q

Contingency procedures for emergencies must be covered where

A

In the project plan

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45
Q

What is the max depth air or nitrox can be used in surface dive

A

50 meters

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46
Q

Is scuba covered by this code

A

No

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47
Q

List some of the problems with SCUBA

A

Limited gas supply, no comms, you have to monitor your own depth and time , you could get snagged and not have enough gas to get free

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48
Q

What other document states that you must not use SCUBA In offshore diving in support of oil/gas projects

A

Diving information sheet 3

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49
Q

What is the max time allowed on air at 100ft

A

50 mins

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50
Q

What is the maximum time allowed on air at 15 m,s

A

180 mins

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51
Q

What is the maximum PPO2 for surface dives

A

1.4 bar

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52
Q

What is the max bottom time at 50 m,s

A

20 mins

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53
Q

What is the max bottom time at 12 m,s

A

240 mins

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54
Q

When breathing a nitrox mix with a higher O2 content what must you use

A

Use an EAD table

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55
Q

What type of diving is done below 50 metres

A

Closed bell diving

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56
Q

When are mech isolations not required when diving near intakes and discharges

A

When protected by a suitable physical guard

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57
Q

How should you enforce diver safety

A

By a permit to work system

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58
Q

What is the maximum water current allowed at the immediate vicinity of the water intake point

A

1 knot

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59
Q

If a grill is fitted where should this 1 knot apply

A

To the surface of the grill

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60
Q

Where a grill is fitted what is the maximum opening allowed

A

400 square cm

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61
Q

How does marine growth affect this flow rate

A

It would increase it

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62
Q

With respect to fire intakes what are the two recommendations

A

A protective structure to ensure diver safety in the event of automatic start up and any such device be regular Inspected

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63
Q

Who can stop diving operations due to reduced visibility

A

The master , superintendent or supervisor

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64
Q

Most installations have an over-the side work rule governed by what

A

The ability for the standby vessel to able to see and recover a man from the water

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65
Q

At one knot what force would this apply to a standing diver

A

10kg

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66
Q

At 1.5 knots what force would this apply to a standing diver

A

23 kg

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67
Q

A surface diver working normally in mid-water can work in what current

A

0.8 knots

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68
Q

A surface diver doing light work on the bottom can work in what current

A

Up to 1 knot

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69
Q

A bell or wetbell diver working mid-water , doing light work can work in what current

A

Up to 1.2 knots

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70
Q

A bell/wetbell diver on the bottom doing light work can work in what current

A

Up to 1.5knots

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71
Q

What hazard can occur when working with ROV,s

A

Electrical entanglement, and physical impact

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72
Q

What safety measures can be employed

A

Reduced umbilical length and electrical isolation switches

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73
Q

ROV,s can have voltages up to what

A

3.3kv

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74
Q

An ROV,s thrusters must have what

A

Prop guards

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75
Q

If you have divers in the water can the ROV,s beacon or tracking device be used as a primary reference for DP

A

No

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76
Q

When does the diving supervisor have authority over the ROV supervisor

A

When a diving operation is under way

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77
Q

When can the ROV be recovered or deployed

A

Only with the authority of the diving supervisor and vessel master

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78
Q

All Rov operations must be coordinated through who

A

The diving supervisor

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79
Q

What is the maximum voltage allowed in DDC,s

A

24 v/dc

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80
Q

What are the operating parameters of RCD,s

A

30 mA at 20ms

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81
Q

On hand held equipment the fault current is limited to what

A

1 amp

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82
Q

What is the problem with battery charging in a confined space

A

You can get an explosion

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83
Q

What is the maximum battery size allowed in chambers

A

AA 1.5v and 500mA/hr

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84
Q

Give 3 items which are prohibited in the chamber with respect to batteries

A
  1. Rechargeable power tools
  2. Batteries containing toxic material
  3. Battery chargers
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85
Q

What is the max voltage for surface tools

A

110v

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86
Q

Before any electric item is taken into saturation who must it be cleared by

A

A category 3 or 4 person

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87
Q

When a water jet pump and equipment arrives onboard what do you check

A

That it has an in-date test has is less than 6 months

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88
Q

What is the max pressure required to hold the trigger on a water jet

A

1.35Nm or 12 lb/inches

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89
Q

What is the minimum lance length

A

60cm

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90
Q

How long must you monitor a diver after a water jet injury

A

4/5 days

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91
Q

What can you give a diver to give to his doctor after an injury

A

A plasticized card stating the pressure ( up to 14,000psi ) and velocity of the jet ( 900 mph ) and that unusual infections have come about from this type or injury in the past

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92
Q

How does HP water getting affect DP

A

The noise can affect the HPR system

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93
Q

At what pressure should enclosed lift bag relief valves lift

A

2 psi

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94
Q

What is the safety factor of a lift bag

A

5:1

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95
Q

What is the safety factor of the webbing

A

7:1

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96
Q

What should the list capacity be

A

Plus 0% and minus 5% of fresh water

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97
Q

On some occasions the actual lift is greater than stated by up to how much

A

20%

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98
Q

How often should lift bags be inspected and checked

A

Every 6 months

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99
Q

How often is it to be tested

A

Every 12 months to max safe working load

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100
Q

Why is the use of lift bags dangerous

A

Uncontrolled ascent or decent of a load

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101
Q

For lift bags of 3 Tonnes or above, what size should the inverter line be

A

25mm polypropylene

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102
Q

What should the line be for smaller bags

A

19mm polypropylene

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103
Q

What can happen with abrasive cutting discs what must you do to prevent it

A

The adhesive can degrade and the disk break in use , only dry disks not used in water before to be used , only send down what is required

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104
Q

U/W oxy arc cables should be insulated bit which is the most important

A

The negative

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105
Q

What is the most likely job to produce an explosion under water

A

Oxy-arc cutting in a confined space

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106
Q

What side cables should be used for underwater burning/ oxy-arc cutting

A

The supply cable ie( - amps) 75mm2

On the return side ( + Amps ) 70mm2

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107
Q

What can happen in the rod whilst the gun is energised

A

Hydrogen can be produced inside the rod

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108
Q

What must you do before making it hot

A

Flash the gun

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109
Q

What are the dangers of oxy arc cutting underwater

A

Shock , explosion and the trapping of divers after cutting an object free

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110
Q

Who can veto the start or terminate a diving operation

A

The master , the client or the diving supervisor

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111
Q

The DP operator must inform who of what

A

Relevant control centres of any changes in operations

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112
Q

Who is the only person that may order the start of a diving operation

A

The diving supervisor

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113
Q

How can procedural changes be recorded

A

In writing or electronically

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114
Q

When a vessel rotates around its vertical axis what is this called

A

Yaw

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115
Q

When a vessel moves to port and starboard what is it called

A

Sway

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116
Q

When a vessel moves forward and astern in DP what is it called

A

Surge

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117
Q

When a vessel moves up and down what is it called

A

Heave

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118
Q

When a vessel bow goes up and down what is it called

A

Pitch

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119
Q

When a vessel rotates around its axis of direction what is it called

A

Role

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120
Q

What are the bigger problems with hydro acoustics on a DP vessel

A

You have a bigger foot print in deep water

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121
Q

When on DP what must the vessel be able to do safely with respect to the diver

A

The system should not endanger the diver and he must be clear of the current produced by the thrusters

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122
Q

What is the name of the wind sensor

A

Anemometer

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123
Q

What is the minimum number of independent refference systems required for diving

A

3

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124
Q

Can these be all the same

A

No , at least two should be of different types

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125
Q

How long must the vessel be on DP before diving opps start

A

30mins

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126
Q

When would you get a DP alarm with respect to power output

A

At 80%

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127
Q

How many classes of DP are there

A

3

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128
Q

What alarm would you get for a degraded operational status

A

Flashing yellow (amber) light with audio alarm

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129
Q

What must you be able to do with the alert

A

Cancel the audio alarm

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130
Q

What are your actions when you get a yellow alarm

A

Make job safe then move to agreed safe place

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131
Q

If a DP alarm goes who besides the supervisor will DP tell

A

Master and superintendent

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132
Q

You ask the DPO to move 5 m,s and do a 10 degree heading change is this ok

A

No you must do one at a time and wait for the vessel to settle

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133
Q

When doing a move it must stay within what

A

The scope of all three references

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134
Q

When diving in shallow water do you still need 3 reference systems on line

A

Yes and one must be a radio or surface reference system

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135
Q

Give two reasons why the DP suffers in shallow water

A

The scope of the reference system may be less than the vessels natural excursion, the noise from the vessel may interfere with the acoustic system

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136
Q

A DP DSV is on a 4 point mooring 6 Miles offshore in uk waters salvaging a helicopter at 58m,s depth which ACOP regs cover this operation and why

A

Offshore diving regulations because its deeper than 50m,s

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137
Q

A DSV is on DP in a scottish loch the depth is 200m,s the divers are working at 25m,s what regards cover them

A

Offshore diving regulations because the vessel is on DP

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138
Q

On a DP vessel when diving you must have comms between who

A

Dive control and the crane also dive control and DPO

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139
Q

The DPO says you have a boat approaching and cannot contact him what do you do

A

You get the divers to an agreed safe place ( he has not given you an alarm)

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140
Q

When diving in shallow water which system is least affected

A

Radio or surface positioning reference

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141
Q

Acoustic beacons for DP PRS must be no closer to a subsea structure than what

A

10m,s

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142
Q

When diving in shallow water what DP reference systems should be used

A

Radio or surface positioning systems

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143
Q

Under UK regulations how many independent reference systems must be online

A

3

144
Q

Who should a DPO inform when he gets an alarm

A

Dive supervisor, dive superintendent and the master

145
Q

On a DP vessel the mobile antenna fir Artemis is where

A

On the vessel

146
Q

What type of signal is Artemis

A

Micro wave radio

147
Q

What affects it

A

Fog , mist, people walking in front of it , reflective surfaces

148
Q

What is the closest a taut wire can be to a structure

A

10m,s

149
Q

At 50m,s how far would a platform come out with a batter of 1 in 10

A

5 m,s

150
Q

What is the maximum angle of the taut wire before it is required to be re-plumbed

A

20 degrees

151
Q

When in DP and in diving mode when can the DPO move the taut wire

A

Only with the supervisors permission

152
Q

Can a weak link be used to prevent an umbilical coming into contact with a hazard

A

No

153
Q

When diving in shallow water what must one of the references be

A

Radio or surface position reference

154
Q

Mooring lines must be identified by what

A

2 Independant means ( ROV,s buoys)

155
Q

What clearance must you have between the bell and mooring lines

A

50m

156
Q

For this distance to be less than 50m who must agree

A

The master, superintendent , supervisor and client

157
Q

If this is done what must be enforced

A

Monitoring of mooring lines and can be the ROV

158
Q

What is classed as shallow water

A

Less than 50m

159
Q

Where would you find the transponder

A

On the sea bed

160
Q

What is the maximum excursion due to vessel motion is allowed

A

Half the critical

161
Q

When was DP class established

A

1st july 1994

162
Q

What are the parameters of a class 1

A

Loss of position may occur in the event of a single fault

163
Q

What are the parameters of a class 2

A

Loss of position should not occur from a single fault of an active component

164
Q

What are the parameters of a class 3

A

Loss of position should not occur from any single failure including flooded compartments

165
Q

A single fault includes what

A

A single inadvertent act by any person onboard

166
Q

How is a yellow alert defined

A

Degraded DP operational status

167
Q

How is a red alert defined

A

DP emergency status ( where there will be loss of position or an inevitable loss of position)

168
Q

All DP DSV,s must be what class

A

Class 2 or class 3

169
Q

With the worst power loss fault possible how long must you be able to maintain DP

A

30 mins

170
Q

How many wind sensors do you require

A

2 in different locations

171
Q

How many giros are required

A

3

172
Q

A dedicated voice communication system should be between who

A

DP and dive control

173
Q

You also require a dedicated communications system between what

A

DP,ECR,ROV,CRANE and dive control

174
Q

When should these communications be tested

A

During DP stabilisation

175
Q

Where else should the DP alarms for red alert be placed

A

Masters cabin , superintendents cabin or senior diving supervisors cabin

176
Q

How accurate should the vessel positioning references be

A

+- 2% of water depth

177
Q

When working in water depths of less than 60m what should the radius of operation be for each of the three position reference systems

A

Equal to or greater than 30% of water depth but never less than 5 m,s

178
Q

How many DPO,s are required in the DP room when diving is underway

A

2

179
Q

As far as communications are concerned what are you advised to keep

A

A communication matrix

180
Q

Acoustic beacons are to be in what % age of water depth when diving

A

25%

181
Q

Position alarms should be set at what for diving

A

5m

182
Q

How many vertical reference units should there be

A

2- 1 can be on standby

183
Q

In daylight what are the signals to indicate to other vessels that diving is taking place

A

3 vertical shapes, ball, diamond , ball

184
Q

At night what are the signals to indicate to other vessels that diving is taking place

A

3 vertical lights red, white ,red

185
Q

Heading changes have to be less than what

A

15 degrees

186
Q

What is the maximum single movement

A

10m

187
Q

What is the preferred movement

A

5m

188
Q

What are the dangers of diving from a DP vessel

A

Being pulled into the prop or a run off

189
Q

Any vessel running on DP must meet what requirements

A

Meet technical and industrial standards

190
Q

Where must the language to be used in a diving job be stated

A

In the diving project plan

191
Q

When must the diving stop with respect to gas

A

When you are at the minimum quantity allowed

192
Q

What is the minimum for surface diving

A
  1. Enough for two dives to max planned working depth.
  2. Enough to pressure both locks in the DDC to max treatment depth plus complete decompression cycles
  3. 90m3 ( 3200ft3) of O2
193
Q

How can this be supplied

A

From storage or two independent supplies

194
Q

If it is form two compressors which are electric what must be the set up

A

One compressor must be on an emergency supply or on another source ie diesel generator

195
Q

Can you use rig air

A

No

196
Q

For mixed gas how much is required for bibs

A

Enough gas for 4 hours of bibs breathing in addition to other reserves

197
Q

How much therapeutic gas is to be kept on board

A

This Is down to the diving contractor

198
Q

How much gas do you require for a helicopter evacuation

A

Enough to pressure up the transfer chamber and the chamber on the helicopter

199
Q

How much gas is required for a bounce dive

A
  1. Enough gas to do the dive at the depth required and enough for a dive to max depth
  2. Enough gas to pressure the deck chamber to transfer twice .if flushing is required then enough for two complete decompressions
  3. Enough gas to be able to pressurise to max diving depth and to carry out a Saturation decompression in case of medical emergency.
200
Q

How much gas is required for saturation diving

A
  1. Enough to do the intended bell run plus the same again as a reserve
  2. Enough gas to blow down the system to max working depth plus the same in reserve
  3. Enough gas to do two complete decompressions from storage including lock runs
  4. Enough O2 fir metabolic consumption and O2 make up multiplied by 2
201
Q

Is the gas in the bell bottles part of the reserve

A

No

202
Q

Can you use the reserve chamber gas for gas blow down the lifeboat

A

Yes

203
Q

What must you do if your gas supplies falls below an agreed minimum

A

Stop diving

204
Q

What is the lowest % of O2 in nitrogen or helium for diving

A

2%

205
Q

When can you use pure He & N2

A

For calibration

206
Q

When heliox or nitrox is used in a divers bailout what must the % be

A

One to cover the greatest possible depth range

207
Q

If you get a supply of mixed gas from a supplier what do you check first

A

Correct markings and the attached analysis certificate

208
Q

If they co-inside is this ok to use

A

No it must be analyzed by a competent person

209
Q

After this when is it analyzed

A

Before use and during use

210
Q

Must you keep onboard a bell locator

A

Yes

211
Q

What depth must the bell transponder be good too

A

200m,s

212
Q

What is the reply frequency of the bell transponder

A

37.5kHz

213
Q

What are the interrogation frequencies

A

A 38.5kHz +- 50Hz

B 39.5kHz +- 50Hz

214
Q

What is the interrogation pulse width

A

4m,s

215
Q

What is the listening life

A

10 weeks

216
Q

What is the reply life at 85db

A

5 days

217
Q

For the bell locator what is the directivity

A

+- 15 degrees

218
Q

What is the minimum detectable range

A

500m,s

219
Q

How long a life support must a hyperbaric lifeboat have

A

72 hours

220
Q

What other safety factors should be taken into consideration when doing an evacuation

A

The safety of the people performing the evacuation

221
Q

The length of the umbilical for a dive should be stated where

A

The diving project plan

222
Q

When diving DP mode what must be considered with respect to the umbilical

A

Fouling and snagging of the umbilical

223
Q

When a doctor is not available at a dive location what must be done

A

A system set up so direct communication with the contractors medical advisor and be able to get that information to a doctor

224
Q

When can you decompress a diver

A

Only when his condition is stable

225
Q

When can you transfer an Ill or seriously ill diver in a chamber

A

When his condition is stable

226
Q

What should supervisors monitor over the comms with a diver

A

His breathing rate and reports from the about himself

227
Q

What things will not assist in assessing safety

A

Temp, heart rate, and his physiological parameters

228
Q

Due to the potential problems with high noise levels what must be used

A

Noise reduction and hearing protection procedures

229
Q

Safe noise levels for un-hooded divers are what

A

175db and 30m from source

230
Q

Safe nouse levels for hooded divers are what

A

185db and min 10m from source

231
Q

Flying after diving comes into 2 categories what are they

A

Air/nitrox diving and mixed gas diving

232
Q

Two altitudes were taken into consideration, what are they

A

2,000 feet (600m)

8,000 feet ( 2,600m)

233
Q

A diver does a no-stop dive for 50 mins within the previous 12 hours, when can he fly below 2,000 feet and above 2,000 feet

A

2 hours below and 8 hours above

234
Q

This 8 hours applies to what type of flight

A

Short flights only

235
Q

How long would you have to wait under the same circumstances for an international flight

A

24hrs

236
Q

For a diver engaged in all other air/nitrox/heliox/bounce activities of less than 4 hours under pressure or a heliox saturation of more than 4 hours, when can he fly

A

12 hours below and 24 hours above

237
Q

For a diver having completed an air/nitrox/trimix saturation of more than 4 hours when can he fly

A

24 hours below and 48 hours above

238
Q

All the previous are for divers with no what

A

DCI problems

239
Q

Following a DCI problem where after recompression the diver is completely resolved of symptoms when can he fly

A

24 hours below and 48 hours above

240
Q

Following a DCI problem where residual symptoms are present when can he fly

A

Consult a diver medical specialist

241
Q

If a diver gets a DCI in flight which is limb pain only what should be done

A

Treat with analgesics, oral fluids and O2 if available

242
Q

If a diver gets a DCI in flight with other symptoms what must be done

A

Get immediate advice from a diving medical specialist, it may be necessary to divert

243
Q

After surfacing from a heliox saturation when do any symptoms of a DCI generally appear

A

Within 6 hours of surfacing

244
Q

Generally when is it said that you have zero chance of a decompression problem after a sat

A

36 hours

245
Q

How long must you remain in the vicinity of a DDC after a saturation, a surface dive requiring stops or a no stop yo yo dive

A

Within 20 mins from it for 4 hours and within 2 hours for 12 hours after surfacing

246
Q

How long for a dive less than 10m,s or two dives or less with no decompression

A

Within 20 mins for 1 hour

247
Q

If travelling / flying is relevant what two places should have this information

A

The diving project plan , the contractors generic risk assessment

248
Q

When do you require active heating

A

When breathing heliox

249
Q

When do you require active gas heating

A

When diving deeper than 150m,s

250
Q

What is the max duration of a sat under normal conditions

A

28 days

251
Q

Under normal conditions divers after a sat how long must you spend on the surface

A

An equal time

252
Q

Who must specify the minimum size of the dive team for a given project

A

The diving contractor

253
Q

Who must satisfy themselves that each diver is competent for the task he will do

A

The diving contractor and the diving supervisor

254
Q

Can a diver who is not competent in a task be used

A

Yes but he must be given guidance from the other team members and supervisors

255
Q

Supervisors have a specific responsibilities which cannot be changed where is this recorded

A

The diving project plan

256
Q

On projects where there is more than one supervisor what might you have

A

You may require a senior supervisor or superintendent

257
Q

What is the minimum team size to run a surface dive UK regs

A 
5
Supervisor
Diver 
S/B diver
2 x tenders
258
Q

What is the minimum team size for a closed bell dive UK regs

A 
9
2x supervisors 
Lss
Lst 
2 x divers 
S/B Diver 
Tender
Tech
259
Q

During a closed bell diving operation how many supervisors are required on shift

A

2

260
Q

How long may the second supervisor be away from dive control

A

30 mins

261
Q

Who should be notified on a change over of supervisors

A

Divers, deck crew and any other relevant people

262
Q

How many hours of continuous rest should a diver get

A

12 hours

263
Q

A bell run of 8 hours is from when to when

A

Lock off to lock on

264
Q

In a two man bell run how long can each diver spend in the water max

A

4 hours

265
Q

When are refreshments to be offered to divers

A

Between the 2nd and 4th hour

266
Q

Name two things a tender must know with respect to the project

A

Diving procedures and emergency plans

267
Q

How many tenders are required when tending from the surface

A

One for each diver in the water

268
Q

How many tenders are required when tending from a basket or stage

A

One for every two divers

269
Q

How many st/by divers are required

A

One for every two divers

270
Q

In a closed bell dive what state of readiness does the surface st/by diver have to be at

A

His equipment is to he readily available

271
Q

Who needs to be at the chamber when you have guys in sat

A

One life support person and one life support person in the vicinity

272
Q

If the life support control is remote from dive control what must be done

A

A LSS must be appointed in writing

273
Q

Can a supervisor take charge of a surface decompression chamber when not directly in contact with it

A

Yes so long as he has video and audio links

274
Q

Can persons not employed by the diving contractor be included in the dive team

A

Yes but must have been vetted to be competent

275
Q

Give an example

A

Techs employed by the vessel

276
Q

When it is expected that you may be working long hours what must be done

A

It must be risk assessed

277
Q

Give 5 factors to be taken into account whilst doing the risk assessment

A 
Work patterns 
Job demands 
Work environment 
Work activity 
Sleep deprivation
278
Q

Diving contractors should ensure that they have adequately assessed and provided for what

A

Any health and safety problems that might arise

279
Q

How many divers require first aid at work certs

A

All of them

280
Q

How should gas storage areas be protected

A

By a fire deluge system

281
Q

Besides cylinders and quads where appropriate what else should be colour coded

A

Pipe work

282
Q

When the diver goes onto his secondary gas supply what must not happen

A

It must not disrupt the other divers supply

283
Q

What ever the primary method of breathing a diver must have what

A

A bailout with sufficient gas to get to a safe place

284
Q

What must be fitted to a surface or closed bell divers breathing gas supply

A

An audible visual hi/low oxygen alarm

285
Q

If reclaim systems are used what is required

A

Audio/visual hi/low O2 alarm and Hi carbon dioxide alarm

286
Q

Gas cylinders in dive baskets should have what

A

A first stage, second stage with mouth piece and a valve with a stiff hose and contents gauge and be secured correctly .
Be opened before the start of the dive .

287
Q

At what % do you treat a mix as if it was pure oxygen

A

25%

288
Q

What must be done for plant to carry oxygen and so 25% or more

A

Cleaned of hydrocarbons and a written confirmation that a formal cleaning procedure has been followed

289
Q

How long must the voice recording of a dive be kept

A

48 hours

290
Q

What must be done to counter a cut umbilical and stop gas loss from a bell

A

Non return valves on gas supplies , all gas and water supplies have valves inside as well as out side, all valves to be clearly labelled, a water proof list of valves to be closed and valves to be open , with a copy on the surface

291
Q

What must be kept in board in case of a lost bell situation

A

Emergency procedures and the required plant for the location and recovery

292
Q

How long must the bell sustain lives in the case of trapped divers

A

24 hours

293
Q

What must be onboard in case the main lift gear fails

A

Alternative lifting arrangements

294
Q

What must be displayed on an emergency rescue craft ( e.g SPHL )

A

A clear visible when afloat set of 3 IMO agreed markings and instructions

295
Q

How many types of hyperbaric crafts are there designed to float in water

A

Three

296
Q

What is type 1 rescue craft

A

This has a pressure vessel for the divers and a compartment for the supervisor and crew and Is like a life raft usually self propelled

297
Q

What is a type 2 rescue craft

A

A pressure vessel with a protective frame and can be propelled

298
Q

What is a type 3 rescue craft

A

A diving bell used on small setups

299
Q

How should they be coloured

A

International distress orange on the part above water and with reflective strips

300
Q

Are they all fitted with toeing harnesses if so how are they fitted

A

No not all, fitted so it will not wash off but break away straps so it can be got by the towing vessel

301
Q

How many green signs should be on each craft

A

Three , one on the top and one each side

302
Q

What does it look like

A

A rectangle of minimum sides 1200mm x 450mm with a green back ground with a white cross and a yellow bell

303
Q

Are there any other signs on it

A

A warning sign
Name of vessel from
Weight in air
Lifting points

304
Q

Each type must have what to aide detection

A

An active method of attracting attention, beacons, lights etc

305
Q

What type may have different marking systems

A

Type 3

306
Q

Where can you find out what the minimum amount of first aid is to be held and where

A

DMAC 015

307
Q

A chamber to act as a medical facility should have a minimum diameter of what

A

1.8m ( 6 feet ) but preferably 2.15m ( 7 feet )

308
Q

A chamber should have the facility to assemble a bunk to do what

A

Be waist high, accessible from one side and allow tilting of 30 degrees and a medical lock of at least 300mm diameter, suitable lighting and sufficient gas and electrical penetrations

309
Q

What are the specs for man riding wires

A

A breaking strain of 8 times normal working load and non twisting wire

310
Q

If a main lift wire passes its safety factor 8:1 is it still suitable for use

A

So long as it doesnt drop to less than 90% of its original value

311
Q

If the wire has dropped below the previous safety factor and percentage does the whole rope have to be discarded

A

Not necessarily just cut back and a further cut back test completed

312
Q

What is required with respect to brakes

A

You should have a primary and secondary braking system

313
Q

If the secondary system is hydraulic what I’d required

A

That if the handle is released or a system failure the brand is applied

314
Q

What must a winch NOT be fitted with

A

Pawl and ratchet gear to enable it to pay out

315
Q

What is the ratio for non-man riding wires

A

5:1

316
Q

The HSE has recommended in DVIS 6 which type of wire rope is preferred

A

Galvanished wire ropes

317
Q

Why is galvanished rope advised

A

It provides sacrificial protection and corrosion fatigue and fretting protection

318
Q

How often should shaves be lubricated

A

Weekly

319
Q

What must be done to ensure that multi strand ropes are maintained correctly

A

They should be pressured lubricated every 6 months

320
Q

What tension should be applied to the wire rope when Intially wound on the drum

A

A load equal to the bell Weight in water

321
Q

How often should the rope be visually inspected

A

Daily

322
Q

What indications could you get to show that there could be internal damage

A

Reduction in diameter and lay distortions

323
Q

How often should the wire be tested and how

A

Every 6 months to 1.25 x SWL and a function test at the SWL by a category 3 or 4 competent person

324
Q

What is defined as the safe working load ( SWL )

A

Is the weight of the rope and bell when the bell is manned at its heaviest point

325
Q

How much wire rope is cut back on a yearly basis

A

From the bell to just past the sheave when the bell is submerged

326
Q

What is recommended to be done on a yearly basis

A

That the 6 month inspection is supplemented by NDT inspection

327
Q

If this is carried out what can be done with respect to the cut back

A

It may be considerably shorter

328
Q

If the wire has dropped below safety factor of 8:1 and 90% of it’s original strength, does the whole rope have to be discarded

A

Yes

329
Q

What are the specs for a dive basket or open bell

A 
1. To be able to carry 2 divers In 
an uncramped condition 
2. Prevent the divers from falling out
3. To prevent spinning and tipping 
4. Have overhead protection and handles 
5. A secondary means of recovering the divers must be available
330
Q

Clamping mechanisms on trunks and locks must have what

A

An interlock which makes it impossible to open if pressure is inside

331
Q

What happens to the doors in the chamber when doing a TUP

A

Should be shut and sealed and not open until the mating doors are shut

332
Q

What must you have besides an interlock

A

Communication between supervisor and the station

333
Q

What type of chamber must be at all work sites covered by this code

A

Two person two compartment

334
Q

Due to the extreme conditions plant comes under offshore what must be done

A

Maintained and tested regularly and inspected immediately before use

335
Q

Details of maintainance should be entered where

A

In the diving project plan

336
Q

What must a plant register logs

A
  1. Test certs
  2. Materials used in the construction of bells and chambers etc
  3. Any limitations
337
Q

What document covers testing of plant

A

IMCA DO18

338
Q

How often should bailouts be checked and tested

A

Checked internally every 6 months for water and rust

Checked to BS 5430 every 2 years

339
Q

How often must bell wires and basket wires be checked and tested

A

Every 6 months a static test 1.25 x SWL plus function test of system
Every 12 months a static test 1.5 x SWL

340
Q

How often is it cut back and to where

A

Every 12 months past the first sheave

341
Q

How many supervisors can be in charge of a diving operation

A

Only 1 at any time

342
Q

Who is the only person that can authorize the start of a dive

A

The responsible supervisor

343
Q

Before a diving supervisor starts a dive what must he makes sure of

A

That he is following the ACOP,s

344
Q

Has the supervisor got the authority to exclude persons from dive control

A

Yes under regulation 10

345
Q

Every person engaged in a diving project must follow who’s direction

A

The supervisors under regulation 11

346
Q

Must these people follow his every command

A

They must follow reasonable directions

347
Q

Are the main and restricted HSE part certificates issued under diving operations at work regulations 1981 still valid

A

Yes

348
Q

Are the transitional certificates still valid

A

Yes

349
Q

Are certificates issued by the manpower services commission and the training services agency still valid

A

Yes, but they can be exchanged for the appropriate HSE certificate

350
Q

If you take your medical within the month prior to it expiring when will the new certificate date from

A

From the expiry of the old certificate

351
Q

Can a diver enter a chamber if he does not hold an in date medical certificate

A

Only if it’s an emergency to provide medical treatment

352
Q

What systems does a diving doctor check during a medical

A 
Cardiovascular 
Respiratory 
Central nervous 
Ear, nose , throat , vision and dentition systems 
A persons capacity for exercise
353
Q

If a diver has a DCI what should he do

A

He must enter it in his dive log

354
Q

On his first dive after his treatment what must he do

A

Show this entry to the supervisor

355
Q

Why must he do this

A

So the supervisor can confirm he is fit and clear to dive

356
Q

What must the supervisor check about all the divers before a dive

A

He must check that they are fit to dive and record this in the diving operations record

357
Q

A doctor who is checking divers prior to a sat must be approved by who

A

HSE

IMCA BELL SUPERVISOR (1 decks)

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