API-571 試験問題を無料オンラインアクセス

One way to prevent oxide scale formation on alloy steel is to increase the:

• A.Carbon equivalent of the alloy
• B.Nickel content of the steel
• C.Molybdenum content of the steel to 6%
• D.Chromium content of the steel

What damage mechanism can occur in wet H#S environments and is sometimes confused with wet H#S damage?

• A.Amine cracking
• B.HCl cracking
• C.Polythionic cracking
• D.Ammonia cracking

Amine corrosion occurs principally on what class of materials?

• A.Austenitic Stainless Steels
• B.Duplex Stainless Steels
• C.Carbon Steels
• D.Low Alloy Steels

Blistering and hydrogen-induced cracking (HIC) damage are most affected by what aspect of steels?

• A.Inclusions
• B.Residual Stress
• C.Hardness
• D.Permeability

In most cases, brittle fracture occurs only at:

• A.High temperatures in areas of high stress concentration
• B.Temperatures below ambient in thick sections
• C.Temperatures above the Charpy impact transition temperature
• D.Temperatures below the Charpy impact transition temperature