Question 1

Wet H²S services or _________ acid services are process where hydrogen diffuses into the steel and hydrogen embrittlement (HE) is an issue.

Options :

A : HF

B : Sulfuric

C : Caustic

D : HCL

Answer: A

Question 2

Carbon steel is susceptible to SCC when used in ___________ service.

Options :

A : Hydrogen

B : Ammonia

C : High temperature

D : High pressure

Answer: B

Question 3

Soil to Air interface areas are usually more susceptible to corrosion than the rest of the structure because of ___________ and __________ availability.

Options :

A : Moisture

B : Bacteria

C : Oxygen

D : B and C

E : A and C

Answer: A

Question 4

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 5

Which of the following is not a method used to prevent brittle fracture?

Options :

A : Thorough inspections

B : Strict controls on selecting construction materials

C : Post weld heat treatment

D : Controlling minimum operating temperatures

Answer: A

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