A. 700°C
B. 1,300°C
C. 1,063°C
D. 900°C
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Related Mcqs:
- Quartz is added to gypsum bonded investment to______________?
- A. Increase the strength B. Counter balance contraction of gypsum during heating C. aid in hygroscopic expansion D. Increase the shelf life of investment...
- The best pickling solution for gypsum bonded investment is_______________?
- A. Hydrochloric acid B. Nitric acid C. Sulphuric acid D. Phosphoric acid...
- A thinner mix of a gypsum bonded investment will_______________?
- A. Produce a smoother casting B. Decrease setting expansion C. Increase setting expansion D. Increase thermal expansion...
- 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...
- Binder in phosphate bonded investment is______________?
- A. Magnesium oxide & Phosphate B. Magnesium oxide & Phosphoric acid C. Magnesium oxide & Monoammonium phosphate D. Magnesium oxide & Ortho Phosphoric acid...
- Binder used in Gypsum investment is_________________?
- A. Silica B. Quartz C. Cristobolite D. Calcium sulphate monohydrate...
- The strength of a gypsum investment is dependent on_______________?
- A. Carbon content B. Silica content C. Gypsum D. Copper...
- The most commonly used accelerator in gypsum product is___________________?
- A. Sodium fluoride B. Potassium fluoride C. Potassium sulfate D. Aluminium sulfate...
- ADA specification number of gypsum products are described under____________?
- A. 1 B. 4 C. 12 D. 25...
- As per DNA No. 25, minimum amount of setting expansion required for type V gypsum products_______________?
- A. 0.05 B. 0.10 C. 0.15 D. 0.20...
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