Which of the following increases castability of base metal alloys________________?
Correct answer: B. Beryllium
- A. Tin
- B. Beryllium
- C. Molybdenum
- D. Carbon
Explanation
Beryllium lowers the melting temperature and improves fluidity and castability of cobalt-chromium base-metal alloys. Molybdenum mainly improves strength and corrosion resistance, whereas excessive carbon can promote carbide formation.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
Practise Metals and Alloys
125 free Metals and Alloys MCQs from Dental Materials, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Dental Materials questions like this
Dental Materials is on this paper prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for it.
More Metals and Alloys questions
During soldering, the solidus temperature of the filler material should be_____________?
In Base metal alloys, Corrosion resistance occurs due to___________________?
The castability of chromium-cobait base metal alloys when compared to gold based noble metal alloys is_______________?
Which of the following fuel gases used for soldering, has the highest heat content______________?
Which one of the following elements is NOT added is small amount to be used as grain refiners ?
The rate of tarnish and corrosion of class II cast material having VHN 200 is_______________?