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
Medical Mcqs
Green strength with reference to plaster means_____________?
Green strength with reference to plaster means_____________?
A. Dry strength
B. Compressive strength
C. Strength of dental stone due to green colour
D. The wet strength
Water powder ratio of dental stone and plaster is respectively_________________?
Water powder ratio of dental stone and plaster is respectively_________________?
A. 0.28 and 0.6
B. 0.6 and 0.28
C. 0.6 and 3.2
D. 0.28 and 0.98
Model plaster (white) used to cast study models before mixing with water, is largely composed of____________?
Model plaster (white) used to cast study models before mixing with water, is largely composed of____________?
A. CaO
B. CaCO3
C. (CaSO4)2-½H2O
D. CaSO4-2H2O
White gold alloy predominantly is______________?
White gold alloy predominantly is______________?
A. Gold added with palladium
B. Gold added with calcium
C. Gold with much of chromium
D. Gold with silver
In type II gold alloys _______ Karat gold is used?
In type II gold alloys _______ Karat gold is used?
A. 24 K
B. 22 K
C. 18 K
D. 10 K
The material used in its pure form in dentistry is______________?
The material used in its pure form in dentistry is______________?
A. Composite
B. Silver
C. Gold
D. Amalgam
Cohesion of gold foil is an example of______________?
Cohesion of gold foil is an example of______________?
A. Atomic attraction and welding
B. Annealing
C. Wedging
D. Adaptation
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
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