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.Management Sciences
Category: Amalgams
Which of the following does not occur in High Copper Amalgam ?
A. Electrochemical Corrosion
B. Chemical Corrosion
C. Penetrating Corrosion
D. Corrosion does not occur at all
Decrease in creep occurs in_______________?
A. Under trituration or over trituration of amalgam
B. Decreases with condensation pressure
C. Increase with condensation pressure
D. Cannot be predictable
In spherical alloys as compared to lathe cut____________?
A. Less condensing force is required
B. More condensing force is required
C. Both require same condensing force
D. Manipulation is easy
Amalgam achieves 70% of the strength by____________?
A. hours
B. 4 hours
C. 8 hours
D. 16 hours
The term trituration means____________?
A. Lysing amalgam alloy
B. Mixing of amalgam alloy and mercury
C. Removal of excess of mercury
D. None of the above
The percentage of copper in high copper alloy is______________?
A. 10-12%
B. 0-6%
C. 13-30%
D. 20-30%
How soon after a moisture contamination does a zinc containing amalgam alloy start expanding________________?
A. 24 hours
B. 1-2 days
C. 3-5 days
D. 7 days
Which of the following are characteristic feature of high copper amalgam alloy ?
A. Low compressive strength
B. High marginal breakdown
C. Less marginal #
D. High creep
Well premeasured capsules of amalgam can release mercury vapour during_______________?
A. Mulling
B. Carving
C. Condensation
D. Trituration
Which of the following constituents of amalgam alloy decreases expansion____________?
A. Copper
B. Zinc
C. Silver
D. Tin
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