API 510 Safety & Risk Management 4

Question 1

Under OSHA's Process Safety Management (PSM) standard 29 CFR 1910.119, pressure vessels containing highly hazardous chemicals above threshold quantities are subject to:

Accepted Answer

Mechanical integrity requirements including inspection and testing

Answer

PSM's Mechanical Integrity element (paragraph (j)) requires inspection, testing, and quality assurance procedures for pressure vessels containing covered chemicals.

Question 2

A Safety Instrumented System (SIS) designed to prevent overpressure in a vessel is classified by its Safety Integrity Level (SIL). SIL ratings are defined in which standard?

Accepted Answer

IEC 61511

Answer

IEC 61511 (Process Sector) defines SIL requirements for safety instrumented systems used in the process industries.

Question 3

In a Layer of Protection Analysis (LOPA), an Independent Protection Layer (IPL) must be:

Accepted Answer

Independent, auditable, and capable of preventing the consequence on its own

Answer

An IPL must be independent of the initiating cause, auditable (testable), and capable of preventing the hazardous consequence by itself.

Question 4

During a Process Hazard Analysis (PHA), the 'consequence' of a hazardous scenario is evaluated BEFORE applying safeguards to determine the:

Accepted Answer

Unmitigated risk level

Answer

Unmitigated consequence (without safeguards) is evaluated first to understand the inherent hazard before safeguard credit is applied.

Question 5

An API 510 inspector identifies that a pressure relief valve (PRV) has not been tested within the required interval. The correct action is to:

Accepted Answer

Notify the owner/user and recommend immediate testing or removal from service until tested

Answer

An overdue PRV is a safety deficiency; the inspector must notify the owner/user who must either test the device or remove the vessel from service pending testing.

(API 510) API 510 Inspector Certification Practice Test

(API 510) API 510 Inspector Certification Practice Test

API 510 Safety & Risk Management 4