Regulations

Question 1

What is the safe working distance for scaffolding ratio

Answer 1

1.3m - 1m

Question 2

PTW records should be kept for how long?

Answer 2

12 months

Question 3

Active vs Passive tending

Answer 3

Active- manned
Passive- golden gate

Question 4

What is the maximum ppO2 in water?

Answer 4

1.4bar

Question 5

What is the max reading for CO2 in chambers?

Answer 5

5000ppm

Question 6

State the minimum amount of OBG required on a bell dive

Answer 6

30 minutes of breathing gas at 40L/min (1.5ft3) at the maximum working depth.

Question 7

What is considered the minimum surface visibility for DP diving operations?

Answer 7

Decided by the Vessel master and Diving supervisor
OR
0.5nm / 1000m

Question 8

Black box recordings must be kept for;

Answer 8

24 hours

Question 9

State the IMCA Auditing Publications for the following;
Air
Saturation
Mixed gas
Portable surface supply

Answer 9

Air: D023
Saturation: D024
Mixed Gas: D037
Portable S/S: D040

Question 10

Divers gas supply must be heated beyond what depth?

Answer 10

150m

Question 11

Supervisor checks before any dive include;

Answer 11

Ensure a permit is in place
Relevant personnel informed
Task brief, JSA, Emergency procedures
Machinery isolations and lock outs
Minimum amounts of gas and consumables available.
Suitable weather conditions
Flags and lights displayed

Question 12

IMCA Publication regarding flying after diving

Answer 12

IMCA DMAC D07 Rev.2

Question 13

Following a DCI, that is treated with full resolution of
Symptoms. How long to wait until flying?

Answer 13

24hrs 2000’
72hrs International Flights

Question 14

Following any uneventful dive state the time to fly after diving

Answer 14

No D dive < 60mins
-2000’ 2hrs
-int. 24hrs

Any dives < 4hrs & Heliox Saturation
-2000’ 12hrs
-int. 24hrs

Air/nitrox/Trimix saturations > 4hrs
-2000’ 24hrs
-Int. 48hrs

Following DCI, good after first treatment
-2000’ 24hrs
-int. 72hrs

Question 15

After a no-D dive less then 10min state time and proximity to a chamber

Answer 15

Within 20mins of a chamber for 1hr.

Question 16

After repeat dives, deco dives or saturation deco state the time and proximity to a chamber

Answer 16

Within 20mins for 4hrs
Then
Within 2hrs until 12hrs since surfacing.

Question 17

DMAC 13 rev2
Returning to work after DCI

Answer 17

A) Limb Pain
Uncomplicated- 7 days
Relapse- 14 days

B) Skin Bends; 7 days

C) Neurological; 28days reviewed by medical specialist.

D) Pulmonary; 3 months and reviewed by medical specialist

Question 18

Before any diving operation can commence, This needs to be in place.

Answer 18

The diving project plan

Question 19

Considerations for sea fastening

Answer 19

NDT any welds
Consider fuel tanks and other potential hazards

Question 20

All Lars wires should be;

Answer 20

Non rotating
Have a 8:1 safety factor
Require annual destructive testing

Should be pressure lubricated every 6 months
Replaced every 2 years.

Question 21

LARS winches must have

Answer 21

2 independent brakes one of which should come on automatically.
Should be documented as “man-riding”

Question 22

Standby divers umbilical should be how much longer than D1?

Answer 22

2m longer

Question 23

Divers umbilical should be restrained to be how far from any hazards like thrusters

Answer 23

5m

Question 24

State umbilical PMS

Answer 24

6monthly functioned tested
2years MWP

Question 25

Hot water can scald a diver when heated beyond

Answer 25

45degrees Hot water must be fitted with a hi/low alarm in dive control with temperature displayed

Question 26

State the max current for Normal Working dives

Answer 26

Recently updated to 1knt Should be downtrending tide

Question 27

Serious offshore incidents must be reported to who?

Answer 27

OIM Vessel Master

Question 28

Who is in responsible for the safeguarding of pipelines at a differential pressure?

Answer 28

Pipeline owner/operator

Question 29

What equipment can the diver remove on his last decompression stop?

Answer 29

None, he must remain fully dressed

Question 30

Name 3 documents required to be in dive control

Answer 30

Safety management system Diving Manual Company Operations Manual

Question 31

Any modifications to a controlled document will be carried out by?

Answer 31

A person designated as a central control point such as QA/QC

Question 32

What document contains guidance on the periodic examination, testing and certification of the diving plant and equipment?

Answer 32

IMCA D018

Question 33

Categories of competent personnel and who they are

Answer 33

Cat1; Dive Supervisor, LSS, Cat2; Tech Cat3; Chief Engineer Cat4; Manufacturer or Supplier

Question 34

Minimum gas requirements for air diving

Answer 34

-Sufficient compressed gas for 2 emergency dives to the full intended depth as reserve. -sufficient compressed air to pressure both locks of the ddc to maximum treatment depth (50msw) plus sufficient air for 3 complete decompression cycles -this air must be stored in containers or else be supplied by 2 totally independent dedicated sources. -90m3 (3200ft3) of medical quality oxygen for emergency treatment procedures

Question 35

State the minimum and maximum ppO2 allowed in bailouts

Answer 35

Maximum 1.4bar regardless of depth Minimum 0.4bar Minimum ppO2 should be the same as the divers breathing gas. However the minimum is 0.4bar

Question 36

What is the purpose of a bridging document

Answer 36

It’s used to interface between contractors and clients. It outlines work procedures, managements structures and emergency response planning.

Question 37

Changes to procedures and equipment will require going through what process?

Answer 37

Management of Change

Question 38

What is the maximum depth for surface gas diving?

Answer 38

75msw

Question 39

Regarding surface gas diving; for dives between 0-50msw IN WATER deco should be limited to a maximum of how many minutes?

Answer 39

100 minutes

Question 40

With regards to surface gas diving; Dives between 50-75msw should be limited to a maximum bottom time of?

Answer 40

30 minutes

Question 41

A basket fitted with a dome is an acceptable wet bell. True or False?

Answer 41

False

Question 42

Diving at Work Regulations 1997 SI 1997 No 2776

Answer 42

Forms the basis for the international code of practise

Question 43

Notes regarding Air / Hydraulic winches; how brakes apply, number of brakes, static or dynamic test, safety factor (man riding)

Answer 43

AIR TUGGERS -brake automatically applies as default -NOT fitted with ratchet and pawl -8:1 safety factor BELL HYDRAULICS -2 independant brakes -tested seperatly ( primary dynamically secondary statically) -brake auto applies in loss of power situation