API Corrosion and Materials Professional - API-571 Exam Practice Test

A. In the absence of a free water phase.

B. When dry salts are exposed to a small amount of free water.

C. When excess water washing dissolves too much ammonium chloride.

D. When the salts precipitate from high-temperature streams as they cool.

A. Readily apparent and can be confirmed through metallography

B. Not readily apparent but can be confirmed through tension testing

C. Not readily apparent but can be confirmed through impact testing

D. Readily apparent and can be confirmed through impact testing

A. temperature and microstructure.

B. type of steel and H# partial pressure.

C. temperature and pressure.

D. exposure time and stress.

A. Absorption and permeation of hydrogen

B. Localized zones of weld HAZ hardness above 200 HB

C. Water vapor in the hydrocarbon phase

D. pH of <7 with dissolved H#S present

A. Carbon -1/2 Molys

B. Duplex Stainless Steels

C. High Strength Low Alloys

D. Chrome-Molybdenum Alloys

A. Temperatures below the Charpy impact transition temperature

B. Temperatures above the Charpy impact transition temperature

C. Temperatures below ambient in thick sections

D. High temperatures in areas of high stress concentration

A. Temperatures are below 150°F (66°C) and there is less than 3% water

B. Copper-nickel alloy is used

C. HF acid concentration increases

D. Temperature and water content increase

A. 1300°F (704°C)

B. 1600°F (871°C)

C. 1500°F (815°C)

D. 1400°F (760°C)

A. Carbon-manganese steels with low carbon content

B. Austenitic stainless steel cladding on carbon steel equipment

C. Alloy steels with chromium and molybdenum added to increase carbide stability

D. High-nickel alloy steels selected in accordance with API RP 941

A. Cleaning and pickling in caustic solutions

B. Improper postweld heat treatment (PWHT)

C. High-temperature hydrogen attack (HTHA)

D. Welding with wet electrodes

A. with an Acoustic Emission Testing technique.

B. ultrasonic shear wave examination because cracks develop internally.

C. with a wet fluorescent magnetic-particle testing technique.

D. with a penetrant testing technique used after abrasive or high pressure water blasting of the surface.

A. elevated temperature failure caused by diffusion of hydrogen into the material, typically characterized by blistering and cracking.

B. failure caused by repeated cycling from elevated temperature, typically characterized by through-wall oxide filled ruptures with little bulging.

C. cracking failure caused by sulfides formed at elevated temperature that convert to acids on exposure to moisture and oxygen.

D. elevated temperature failure caused by localized overheating, typically characterized by bulging and thinning.

A. Stress corrosion cracking

B. Fluoride stress cracking

C. Hydrogen stress cracking

D. Wet HF cracking

A. Deep penetrating eddy current

B. Spectroscopy

C. Neutron backscatter

D. Low-intensity X-ray imaging scope