Medical MCQs

5099 MCQs  (Page 65 of 510)

Compared with noble metals, base metals show_______________?
A. Increased hardness
B. Increased ductility
C. Better biocompatibility
D. Increased density
Dendrites in cst alloys form by mechanism of_________________?
A. Constitutional superconductivity
B. Constitutional supercooling
C. Constitutional supergriting
D. Constitutional supergraining
Advantage of titanium over other base metal alloys_______________?
A. Low weight
B. Low cost
C. Low strength
D. Low melting point
Nickel-Titanium alloy has__________________?
A. Unreliable spring back
B. Low spring back
C. Minimal spring back
D. None of the above
Binder used in Gypsum investment is_________________?
A. Silica
B. Quartz
C. Cristobolite
D. Calcium sulphate monohydrate
Suck back porosity in the casting can be eliminated by________________?
A. Increasing the mould metal temperature difference
B. Increasing the flow of molten metal
C. Flaring the point of the sprue attachment
D. All of the above
Which of the following decrease with strain hardening______________?
A. Surface hardness
B. Strength
C. Proportion limit
D. Corrosion resistance