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.Management Sciences
Category: Dental Materials
The percentage of copper in high copper alloy is______________?
A. 10-12%
B. 0-6%
C. 13-30%
D. 20-30%
Shape memory is seen in________________?
A. Stainless steel wire
B. NITTINOL wire
C. TMA wire
D. Aluminium
Which of the following is the main constituent of porcelain__________________?
A. Feldspar
B. Kaolin
C. Quartz
D. Clay
Coefficient of thermal expansion of which of following is most similar to that of tooth ?
A. Gold inlay
B. Acrylic resin
C. Silicate cement
D. Gold foil
Hypersensitivity reactions like contact dermatitis can be caused by______________?
A. polysulfides
B. Condensation silicones
C. addition silicones
D. Polyether
With indirect spruing. Which one of the following porosities can be minimised_______________?
A. Back pressure porosity
B. Localized shrinkage porosity
C. Pin hole porosity
D. Micro porosity
Strength of zinc phosphate is effected by_______________?
A. Temp of glass slab
B. P:L ratio
C. Consistency of mix
D. Alteration of mixing time
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
Water of reaction needed to react completely with 100 g of calcium sulphate hemihydrates to convert it to calcium sulphate dihydrate______________?
A. 18.6ml
B. 22.2ml
C. 30.4ml
D. 45.3ml
Inelastic impression material is_____________?
A. Impression compound
B. Alginate
C. Agar-agar
D. Polyether
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