Question 1

Temper embrittlement is a metallurgical change that is not readily apparent and can be confirmed through ________.

Options :

A : Metallographic examination

B : Impact testing

C : Metallography

D : None of the above

Answer: B

Question 2

The effects of hydrogen embrittlement ___________ with _________ temperatures.

Options :

A : Increase, increasing

B : Decrease, decreasing

C : Increase, decreasing

D : Decrease, increasing

Answer: D

Question 3

Steam blanketing is when the heat flow balance is disturbed; individual bubbles join to form a steam blanket, a condition known as Departure from Nucleate Boiling (DNB). Once a steam blanket forms, tube rupture can occur rapidly, as a result of _________.

Options :

A : Thermal fatigue

B : Short term overheating

C : Brittle fracture

D : Stress

Answer: B

Question 4

Many thermal fatigue cracks are filled with:

Options :

A : chlorides

B : hydroslime

C : oxides

D : sulfides

Answer: C

Question 5

Which of the following materials are generally not suitable for HF service?

Options :

A : 300 Series SS

B : Carbon steel

C : 400 Series SS

D : Both A and C

Answer: D

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