Systems And Equipment

Question 1

State PMS for diving chambers and viewport.
Also special consideration for bell

Answer 1

6 monthly
Visual

2.5 years
Max Working pressure leak test

5 years
Overpressure test 1.25x MWP

10 years
Replace view ports

Bell needs Ext Pressure test every 5 years

Question 2

State the PMS for man riding winches.

Answer 2

6 months:
-Visual and function test @max SWL
-Static load test on each braking system @ 1.25 x SWL

1 year
Static load test on each independent brake @1.5 x SWL
NDT of critical areas after the test

Question 3

Umbilical considerations;
D1 vs D2 lengths
DP Restrictions
PMS

Answer 3

Restrained 5m from hazards
Stby hose is 2m longer
Marked every 10m

6months- Function test
2 years- pressure test to MWP

Question 4

State the PMS for umbilicals and pipeworks

Answer 4

6 monthly
Function/Pressure test

2 years
Leak and pressure test at max working pressure

Question 5

Safety Factor of man riding and recovery type wires example; cross-haul, guide wire, main wire.

Answer 5

8:1 for man riding and recovery
Otherwise
2:1

Question 6

State the PMS for main wire

Answer 6

6months
Visual inspection
Static load test @ 1.25 x SWL

1 Year
Cut back beyond first sheave and destruction test
Re-terminate and static test @ 1.5 x SWL

Question 7

State breathing air compressor PMS

Answer 7

6 monthly IMCA
Pressure and gas purity test.

BSEN 12021

Question 8

What is the most common radioactive substance used offshore?

Answer 8

IR 192

Question 9

What is the distance that should be left clear to the top of the winch drum when spooling wire onto it?

Answer 9

2.5 times the wire diameter
Never overload the drum

Question 10

Who is responsible for the radioactive source once it is in the water

Answer 10

Radiography Supervisor
Is always in charge of the source no matter the location

Question 11

What should be done with grinding discs that have been subsea?

Answer 11

Discard them

Question 12

Working at height is considered to be heights above;

Answer 12

2.0m

Question 13

Snap hooks can be used subsea?
True or False?

Answer 13

The cannot.
Use safety hooks

Question 14

Multi leg slings should ideally be use with legs at less than X degrees to each other and never more that Y degrees;

Answer 14

Less than 90 degrees and never more than 120 degrees

Question 15

The maximum fleet angle at the sheave is?

Answer 15

1.5 degrees

Question 16

How many turns of wire should remain on the tugger when paying out a load?

Answer 16

5 turns left on a winch drum

Question 17

What is the most dangerous occurrence during battery charging?

Answer 17

The production of explosive gas

Question 18

Which current is preferred subsea,
AC or DC?

Answer 18

DC current subsea

Question 19

How long to wait after an explosive misfire?

Answer 19

30mins

Question 20

The safe use of lift bags can be found in which IMCA publication?

Answer 20

IMCA D014

Question 21

Lift bags are normally designed with attachment point not less than how many times the WLL of the lift bag?

Answer 21

1.5 times

Question 22

Who leaves the worksite first,
Diver or ROV

Answer 22

Diver will leave the worksite first

Question 23

Divers can work on pipelines under test pressure.
True or False?

Answer 23

False

Divers should not approach lines under pressure or damaged lines until they have reached a safe pressure as per JHA and risk assessment.