Question 1

Exposure to high solution strength caustic can result in general corrosion or high corrosion rates above ________.

Options :

A : 175º F

B : 150º F

C : 125º F

D : 100º F

Answer: B

Question 2

Many thermal fatigue cracks are filled with:

Options :

A : chlorides

B : hydroslime

C : oxides

D : sulfides

Answer: C

Question 3

Welds joining dissimilar materials (ferritic and austenetic) may suffer __________ related damage at high temperatures due to differential thermal expansion stresses.

Options :

A : Stress

B : Creep

C : Fatigue

D : Thermal stress

Answer: B

Question 4

The dewpoint of hydrochloric acid depends on the concentration of hydrogen chloride. It is typically about _________.

Options :

A : 180º F

B : 160º F

C : 130º F

D : 110º F

Answer: C

Question 5

Spheroidization and graphitization are competing mechanisms that occur at overlapping temperature ranges. Spheroidization tends to occur preferentially above _______ while graphitization predominates below this temperature.

Options :

A : 1000º F

B : 1025º F

C : 1050º F

D : 1100º F

Answer: B

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