API 510 Repair and Alteration Standards 3

Question 1

According to API 510, a weld overlay repair used to restore wall thickness must have a minimum deposited thickness that meets:

Accepted Answer

The minimum required wall thickness per the applicable code

Answer

Weld overlay (cladding) must restore the wall to at least the minimum required thickness calculated per the applicable construction code.

Question 2

When an existing pressure vessel nozzle is being replaced, the replacement nozzle must conform to:

Accepted Answer

The original construction code or a later edition approved by the jurisdiction

Answer

Replacement nozzles must conform to the original construction code or a later code edition acceptable to the jurisdiction.

Question 3

Which preheat practice is used to prevent hydrogen cracking in high-strength low-alloy (HSLA) steel repair welds?

Accepted Answer

Maintaining elevated preheat and interpass temperatures throughout welding

Answer

Maintaining proper preheat and interpass temperatures slows the cooling rate and allows hydrogen to diffuse out before cracking can occur.

Question 4

In API 510, the term 'fitness-for-service' (FFS) evaluation is used to:

Accepted Answer

Assess whether a degraded vessel can continue to operate safely under defined conditions

Answer

A fitness-for-service evaluation assesses the structural integrity and remaining life of a vessel with degradation to determine if continued operation is safe.

Question 5

When a pressure vessel shell is repaired by inserting a full-circumference insert plate, the longitudinal weld seams of the insert must be:

Accepted Answer

Offset from the original shell seams by a minimum distance specified in the code

Answer

Insert plate longitudinal seams must be offset from the original seams to avoid weld intersections that concentrate stress.

(API 510) Certified Pressure Vessel Inspector Practice Test

(API 510) Certified Pressure Vessel Inspector Practice Test

API 510 Repair and Alteration Standards 3