API 653 Inspection Planning 5

Question 1

API 653 states that inspection intervals may be extended beyond standard limits when which condition is met?

Accepted Answer

A documented RBI program demonstrates acceptable risk at extended intervals

Answer

API 653 allows extended inspection intervals when a formal risk-based inspection program with documented analysis demonstrates that risk remains acceptable.

Question 2

When planning the scope of a tank inspection, API 653 requires the inspector to consider the potential for which damage mechanism in tanks storing crude oil with high water content?

Accepted Answer

Microbiologically influenced corrosion (MIC) at the water-oil interface

Answer

Tanks storing crude oil with water bottoms are susceptible to MIC at the water-oil interface, which can cause rapid localized corrosion of the tank bottom.

Question 3

According to API 653, which item should be included in the written inspection plan to ensure inspector and worker safety during an internal inspection?

Accepted Answer

Confined space entry procedures and atmospheric monitoring requirements

Answer

Written inspection plans must include confined space entry procedures, atmospheric monitoring for oxygen deficiency and flammable/toxic vapors, and rescue provisions.

Question 4

In API 653, the maximum internal inspection interval for a tank in non-corrosive service with known corrosion rates is limited to what fraction of the remaining corrosion life?

Accepted Answer

One-half of remaining life or 20 years, whichever is less

Answer

API 653 limits the internal inspection interval to one-half of the calculated remaining corrosion life or 20 years, whichever is less.

Question 5

When preparing an inspection plan for a tank that has undergone a change in service, API 653 requires the inspector to evaluate:

Accepted Answer

New corrosion rates, damage mechanisms, and suitability of existing materials for the new product

Answer

A change in service requires re-evaluation of corrosion rates, applicable damage mechanisms, and compatibility of tank materials and coatings with the new stored product.

(API 653) API 653 Aboveground Storage Tank Inspector Certification Practice Test

(API 653) API 653 Aboveground Storage Tank Inspector Certification Practice Test

API 653 Inspection Planning 5