Dental Materials MCQs with answers for medical students. Dental Materials questions with answers for all competitive exams and test preparation. Dental materials MCQs with answers pdf, MCQ dentistry PDF with answers,
Cause of expansion in zinc containing amalgam is ?
A. Nascent oxygen
B. Hydrogen
C. Zinc and water
D. WaterPercentage of tin in low copper alloy is ?
A. 13-32%
B. 22-30%
C. 26-28%
D. 30-35%Amalgam restorations give the best clinical service when the residual mercury content is ?
A. 58-62%
B. 68-72%
C. 48-52%
D. 38-42%During amalgamation, trituration is done to ?
A. Dissolve Hg in alloy
B. Dissolve the alloy in mercury
C. Coat the alloy particle with mercury
D. Remove excess mercury from the amalgamLargest component of amalgam alloy is ?
A. Zinc
B. Copper
C. Silver
D. TinIn non zinc containing dental amalgam alloy the percentage of zinc present is ?
A. Less than 0.1%
B. Less than 0.01%
C. Less than 0.02%
D. None of themAmalgam achieves 70% of the strength by ?
A. 8 hours
B. 16 hours
C. hours
D. 4 hoursBy increasing the percentage of which metal, the strength and hardness of amalgam increases ?
A. Zn
B. Hg
C. Ag
D. CuIn amalgam alloy which acts as oxygen scavenger ?
A. Pd
B. Ag
C. Cu
D. ZnWhich is not true about high copper amalgam alloys ?
A. Low creep
B. Low tensile and compressive strength
C. Low Hg: Alloy ratio
D. High tensile strength