API 510 Non-Destructive Examination Methods

Question 1

What is the advantage of ultrasonic testing (UT) for pressure vessel inspection?

Accepted Answer

It can measure remaining wall thickness and detect internal flaws

Answer

Ultrasonic testing measures remaining wall thickness accurately and can detect internal flaws without damaging the equipment.

Question 2

When is radiographic testing (RT) preferred for pressure vessel weld examination?

Accepted Answer

When volumetric examination of welds is required to detect internal discontinuities

Answer

Radiographic testing provides volumetric examination of welds, revealing internal defects like porosity, inclusions, and incomplete fusion.

Question 3

What does magnetic particle testing (MT) detect?

Accepted Answer

Surface and near-surface discontinuities in ferromagnetic materials

Answer

Magnetic particle testing detects surface and slightly subsurface discontinuities such as cracks in ferromagnetic materials.

Question 4

What is the primary limitation of visual testing (VT)?

Accepted Answer

It can only detect surface-accessible defects

Answer

Visual testing is limited to detecting defects that are visible on accessible surfaces and cannot identify subsurface or internal flaws.

Question 5

What is liquid penetrant testing (PT) used for in pressure vessel inspection?

Accepted Answer

Detecting surface-breaking discontinuities in non-porous materials

Answer

Liquid penetrant testing uses capillary action to reveal surface-breaking cracks and discontinuities on non-porous material surfaces.

(API 510) Certified Pressure Vessel Inspector Practice Test