Question 1

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

Options :

A : Hydrogen

B : Ammonia

C : High temperature

D : High pressure

Answer: B

Question 2

Oxygen and iron in the wash water injected into reactor effluent can lead to __________ corrosion and fouling.

Options :

A : Increased

B : Decreased

C : Substantial

D : Minimal

Answer: A

Question 3

At elevated temperatures, dissimilar weld metal cracking is aggravated by the diffusion of carbon out of the weld metal and into the base metal. The temperature at which carbon diffusion becomes a concern is above ________.

Options :

A : 700º F

B : 750º F

C : 800º F

D : 900º F

Answer: C

Question 4

Many thermal fatigue cracks are filled with:

Options :

A : chlorides

B : hydroslime

C : oxides

D : sulfides

Answer: C

Question 5

With ammonia stress corrosion cracking weld hardness should not exceed _______ BHN.

Options :

A : 237

B : 225

C : 235

D : 218

Answer: B

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