Average particle size of powdered gold is________________?
Average particle size of powdered gold is________________?
A. 10 um
B. 15 um
C. 30 um
D. 0.1 um
Dental Materials
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The pure form of gold used in dentistry is known as___________________?
The pure form of gold used in dentistry is known as___________________?A. Cohesive gold
B. Non cohesive gold
C. Class I casting gold
D. Class IV casting gold -
Electralloy is an alloy of________________?
Electralloy is an alloy of________________?A. Gold and Platinum
B. Cobalt and Chromium
C. Gold and Calcium
D. Tin and chromium -
The carat for Au foil used for restorations is_______________?
The carat for Au foil used for restorations is_______________?A. 18
B. 20
C. 22
D. 24 -
Direct filling gold formed by electrolytic precipitation is called by all the terms EXCEPT______________?
Direct filling gold formed by electrolytic precipitation is called by all the terms EXCEPT______________?A. Crystalline
B. Granular gold
C. Mat gold
D. Sponge gold -
When Gold fused with porcelain is fired at very high temperature greenish discoloration of cervical margin is due to________________?
When Gold fused with porcelain is fired at very high temperature greenish discoloration of cervical margin is due to________________?A. High firing temperature
B. Disintegration of opaque layer
C. Presence of copper
D. Formation of excess oxides -
Powdered gold is___________________?
Powdered gold is___________________?A. Made by a combination of chemical precipitation and atomization
B. Made by electrolytic precipitation
C. Made by beating pure gold at high temperatures
D. Made by milling pure gold ingots -
Which of the following is true about direct filling gold______________?
Which of the following is true about direct filling gold______________?A. Properly condensed mat gold has no voids
B. Whatever may be the type voids are inherent
C. Voids can be avoided with manual condensation
D. None of the above -
The malleting force is directed______________?
The malleting force is directed______________?A. Perpendicular to the walls
B. Parallel to long axis of crown
C. 45° to the wall
D. None of the above -
Pitting of direct filling old restoration usually results from_________________?
Pitting of direct filling old restoration usually results from_________________?A. Using contaminated gold foil
B. Poor finished preparation
C. Improper stepg of condenser point
D. Using small condenser point