ADA specification number of gypsum products are described under____________?

Related Mcqs:

1. The ADA specification No 1 for composition of amalgam alloy recommends______________?

   A. 65% silver, 32% tin and 3% copper B. 49% silver, 32% tin and 19% cooper C. 65% silver, 29% tin and 5-6% copper D. None of the above...

2. According of ADA specification No or number 1, the minimum compressive strength for silver amalgam filling aftr one hour should be________________?

   A. 80 Mpa B. 140 Mpa C. 260 Mpa D. 510 Mpa...

3. The American dental association (ADA) specification number for non-aqueous elastomeric dental impression material is______________?

   A. 19 B. 20 C. 21 D. 26...

4. The gold alloys used for casting contain at least…. percent of precious metal according to ADA specification number 5________________?

   A. 55 B. 65 C. 75 D. 85...

5. The product, which is obtained by calcining gypsum under steam pressure at 120-130°C or by dehydrating gypsum in the presence of sodium succinate is_______________?

   A. Alpha – hemihydrates B. Beta – hemihydrates C. Calcium sulphate dihydrate D. Orthorhombic anhydrate...

6. Accelerators and retarders are used with gypsum products mainly to control_______________?

   A. Setting time B. Setting expansion C. Hardness of the set product D. None of the above...

7. The setting expansion of gypsum products can be reduced by________________?

   A. Increased spatulation B. Adding potassium sulfate C. Less water powder ratio D. Allowing setting under water...

8. Which is gypsum product_______________?

   A. Stone B. Plaster C. Investment D. All of the above...

9. The function of 2% potassium sulphate in a gypsum product is_____________?

   A. To regulate the setting expansion B. Regulate setting time C. Acts as retarder D. None...

10. Type I gypsum product is also called_______________?

    A. Impression plaster B. Class I stone / Hydrocal C. Class II stone/Densite D. Model plaster...