Question 1

Many thermal fatigue cracks are filled with:

Options :

A : chlorides

B : hydroslime

C : oxides

D : sulfides

Answer: C

Question 2

Changing to a more corrosion resistant and/or higher hardness material _________ improve cavitation resistance.

Options :

A : Will

B : May

C : Will not

D : May not

Answer: D

Question 3

Which of the following materials is not susceptible to high temperature hydrogen attack?

Options :

A : 300 Series SS

B : 5 Cr-1Mo

C : 9Cr-1Mo

D : All of the above

Answer: D

Question 4

Sour water corrosion in _________ containing environments may be accompanied by carbonate SCC.

Options :

A : H²O

B : H²S

C : CO²

D : O²

Answer: C

Question 5

In most cases, brittle fracture occurs only at temperatures below the Charpy impact transition temperature. Steel cleanliness and ________ have a significant influence on toughness and resistance to brittle fracture.

Options :

A : Alloy composition

B : Tensile strength

C : Grain size

D : Pressure

Answer: C