API 653 Inspection Planning 3

Question 1

According to API 653, what is the maximum interval for an internal inspection if the corrosion rate is not known and cannot be determined?

Accepted Answer

10 years

Answer

When the corrosion rate is unknown and cannot be determined from historical data, API 653 limits the internal inspection interval to 10 years.

Question 2

In API 653 inspection planning, what does the term 'remaining life' refer to?

Accepted Answer

The estimated time until the tank reaches minimum acceptable thickness

Answer

Remaining life is the estimated time until the tank wall reaches the calculated minimum required thickness based on current thickness and corrosion rate.

Question 3

Before conducting an inspection, API 653 requires that the inspector assess the tank's service history to identify which of the following?

Accepted Answer

Changes in product stored, operating conditions, or known damage mechanisms

Answer

Service history review identifies changes in stored product, temperature, pressure, or damage mechanisms that could affect inspection scope and findings.

Question 4

Which API 653 inspection category involves examination of the tank from the outside without removing the product or entering the tank?

Accepted Answer

In-service inspection

Answer

In-service inspection is conducted while the tank remains in operation, examining external surfaces, appurtenances, and foundation without product removal.

Question 5

According to API 653, which condition would MOST likely trigger an unscheduled inspection outside the normal interval?

Accepted Answer

Discovery of a leak, unusual settlement, or significant corrosion

Answer

Unscheduled inspections are triggered by abnormal conditions such as leaks, unusual settlement, significant corrosion findings, or other integrity concerns.

(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 3