3.4u Day 1 Homework

Question 1

A vertical steel pipe carrying crude oil away from a production platform is called?

Answer 1

An Export Riser

Question 2

A Gas bubble trapped in the molten metal can cause what type of defect in a steel plate?

Answer 2

A Lamination

Question 3

Which of the following may cause metal fatigue?

Answer 3

Cyclic loading and unloading

Question 4

A small conical depression in a concrete surface is known as?

Answer 4

A Popout

Question 5

Since 2005 how often must a ‘Safety Case’ be reviewed?

Answer 5

At Least every 5 years

Question 6

Who is responsible for ensuring sufficient inspection is carried out on an offshore structure under UK legislation?

Answer 6

Duty Holder

Question 7

What aspects of QA are encompassed into an Activity Monitoring System?

Answer 7

Full certification for component locations through as-built drawings
Full material certification
Non-destructive testing (NDT) and inspection certification
Personnel qualifications

Question 8

What prevents the steel reinforcement in a concrete structure from corroding?

Answer 8

Passivation - pH12.5

Question 9

List 6 major items that are inspected regularly on offshore FPS’s and FPSO’s?

Answer 9

Moorings and Risers
Mooring Chains
Visual Hull Surveys (ROV)
Turret Inspection
Mid Water-arch
Lazy S configuration

Question 10

What are the 6 categories of steel structure deterioration?

Answer 10

Gross structural damage.
Corrosion and erosion.
Fouling defects.
Coating defects
Scour
Metal and weld defects.

Question 11

List the 8 Category ‘A’ defects appearing in the UK Government’s Offshore Technology Report

Answer 11

The category A (defects) are:
Cracks.
Impact Damage.
Popouts.
Delamination.
Variables Cover.
Exposed Reinforcement.
Tearing.
Poor Repairs.