

MCQOPTIONS
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1. |
Which of the following metals is/are used for petroleum well valves and wellhead parts? |
A. | Straight chromium stainless steels and stellite |
B. | Monel and copper-based alloys |
C. | Monel, straight chromium steels, stellite, and copper-based alloys |
D. | Monel and stellite |
Answer» D. Monel and stellite | |