Amine stress corrosion cracking is most often associated with lean amine services. The pure alkanolamine does not cause cracking. Cracking in rich amine services are most often associated with _______ problems.

A. H²S

B. Stress

C. Wet H²S

D. Temperature

What structure is 409 stainless steel?

A. Martensitic

B. Austenitic

C. Duplex

D. Ferritic

The creep threshold temperature for 1 ¼, 2 ¼, 5 and 9 Cr is ________.

A. 600º F

B. 700º F

C. 800º F

D. 1000º F

Damage due to __________ is not visible and can only be observed by metallographic examination.

A. Galvanic corrosion

B. Brittle fracture

C. Cavitation

D. Graphitization

The graphitization rate ____________ with increasing temperature

A. Increases

B. Decreases

C. Stops

D. Proceeds

The regenerator reboiler and the regenerator are areas where the temperature and __________ of the amine stream are the highest and can cause significant corrosion problems.

A. Pressure

B. Stress

C. Turbulence

D. Concentration

Amine corrosion depends on the design, operating practices, the type of amine, amine concentration, temperature and _________.

A. Pressure

B. Velocity

C. Stress

D. None of the above

What method is most used to assure boiler feed water corrosion is not occurring?

A. Spot UT readings at turbulent areas

B. Profile RT at turbulent areas

C. Profile RT at stagnant areas

D. Laboratory analysis of boiler feedwater

________ significantly increases the probability and severity of blistering, HIC and SOHIC damage.

A. Caustic

B. Cyanides

C. Stress

D. Temperature

A form of mechanical fatigue in which cracks are produced as a result of dynamic loadings is _______.

A. Spheroidization

B. Vibration-induced cracking

C. Fatigue cracking

D. Stress cracking