API-580 Inspection Techniques and NDE

Question 1

Which nondestructive examination (NDE) method is most effective for detecting subsurface flaws in thick-walled pressure vessels?

Accepted Answer

Ultrasonic testing (UT)

Answer

Magnetic particle testing (MT)

Answer

Liquid penetrant testing (PT)

Answer

Visual testing (VT)

Question 2

What is the purpose of a Fitness-for-Service (FFS) assessment in RBI?

Accepted Answer

To determine if equipment with known flaws can continue to operate safely

Answer

To inspect new equipment before installation

Answer

To calculate insurance premiums for equipment

Answer

To design replacement equipment specifications

Question 3

What does corrosion rate monitoring using coupons involve?

Accepted Answer

Installing metal samples in process streams and measuring weight loss over time

Answer

Applying chemical coatings to equipment surfaces

Answer

Using electronic sensors to measure pH continuously

Answer

Taking periodic X-ray images of pipe walls

Question 4

When is radiographic testing (RT) preferred over ultrasonic testing for weld inspection?

Accepted Answer

When a permanent record of the inspection is needed and for detecting volumetric flaws

Answer

When only surface cracks need to be found

Answer

When testing must be done on ferromagnetic materials only

Answer

When equipment is operating at high temperatures

Question 5

What is the purpose of acoustic emission testing (AET) in RBI programs?

Accepted Answer

To detect active flaws by monitoring stress waves released during crack growth

Answer

To measure wall thickness remotely

Answer

To identify chemical composition of process fluids

Answer

To evaluate coating adhesion on tank surfaces

Question 6

What is the minimum information needed to calculate a remaining life estimate for corroding equipment?

Accepted Answer

Current wall thickness, original/minimum required thickness, and corrosion rate

Answer

Only the equipment age and material type

Answer

Manufacturer's warranty period

Answer

Process temperature and pressure only