API 510 Safety & Risk Management 3

Question 1

In Risk-Based Inspection (RBI) methodology, the risk matrix combines probability of failure (POF) with which other factor?

Accepted Answer

Consequence of failure (COF)

Answer

RBI risk is defined as the product of probability of failure (POF) and consequence of failure (COF), forming the basis of the risk matrix.

Question 2

Under API 510, when using RBI to set inspection intervals, the maximum allowable inspection interval for pressure vessels in highly corrosive service is governed by which standard?

Accepted Answer

API 510 Section 6

Answer

API 510 Section 6 establishes the rules for inspection intervals, even when RBI methodologies per API 580/581 are used to justify extended intervals.

Question 3

A pressure vessel has a remaining corrosion allowance of 0.125 in. and a measured corrosion rate of 0.025 in./year. What is the estimated remaining life?

Accepted Answer

5 years

Answer

Remaining life = remaining corrosion allowance ÷ corrosion rate = 0.125 ÷ 0.025 = 5 years.

Question 4

In a Hazard and Operability (HAZOP) study, the term 'deviation' refers to:

Accepted Answer

A departure from the design intent identified using guide words

Answer

In HAZOP, deviations are departures from design intent systematically identified by applying guide words (e.g., No, More, Less, Reverse) to process parameters.

Question 5

Which API standard provides the foundation for Risk-Based Inspection (RBI) methodology used in conjunction with API 510?

Accepted Answer

API 580 and API 581

Answer

API 580 provides the RBI framework principles and API 581 provides the quantitative risk-based inspection methodology used alongside API 510.

(API 510) API 510 Inspector Certification Practice Test

(API 510) API 510 Inspector Certification Practice Test

API 510 Safety & Risk Management 3