API 510 Pressure Testing 4

Question 1

When performing a sensitivity leak test using pneumatic pressure, what method is commonly used to detect leaks?

Accepted Answer

Soap bubble solution or equivalent

Answer

Soap bubble solution applied to joints and welds is the standard method for detecting leaks during pneumatic pressure testing.

Question 2

What is the typical pressure hold time required for a hydrostatic leak test per ASME Code?

Accepted Answer

10 minutes

Answer

ASME Code typically requires a minimum 30-minute hold at test pressure for hydrostatic tests before inspecting the vessel.

Question 3

A vessel with a corrosion allowance nearly consumed is scheduled for a pressure test. What special concern applies?

Accepted Answer

Evaluate remaining wall thickness to ensure it can withstand test pressure without risk of failure

Answer

The remaining wall thickness must be verified to confirm the vessel can safely sustain the test pressure without risk of failure or plastic deformation.

Question 4

Which of the following best describes an 'alteration' to a pressure vessel per API 510?

Accepted Answer

A physical change that affects the pressure-containing capability beyond original design

Answer

An alteration is any physical change that affects the pressure-containing capability of the vessel beyond the original design.

Question 5

For a pressure vessel in cryogenic service, what special consideration applies when selecting a pressure test medium?

Accepted Answer

Water or gas at ambient temperature may be used with appropriate precautions

Answer

Water or inert gas at ambient temperature is generally used for cryogenic vessel testing since the actual cryogenic fluid is not needed for the pressure test itself.

(API 510) API 510 Inspector Certification Practice Test

(API 510) API 510 Inspector Certification Practice Test

API 510 Pressure Testing 4