Refractory Personnel API-936 Questions and Answers – Valid Dumps Online For Preparation

1. Brick, tile, fired shapes and fused cast shapes are

2. Forms (types) of refractory

3. Fused silica aggregate is used as a raw material in a castable providing

4. Materials having refractory properties which form a refractory body when bonded into a conglomerate mass by a matrix is called

5. For fire clay and some high alumina materials, the most commonly used index of refractoriness is known as:

6. In ceramics, the property of resistance to melting, softening, or deformation at high temperature is called.

7. Refractories chemically and physically stable at

8. Refractories means

9. The functions of refractories include resistance to other destructive influences such as abrasion, pressure, chemical attack, and or rapid changes in temperature is called.

10. Which function of refractories is to resist temperature?

11. Castable, gunning mixes, ramming mixes, plastics, and mortars are

12. Blanket, Module, Bulk paper, rope, and vacuum formed shaped are:

13. Based on-screen analysis, the size of Alumina C silicate aggregate in typical modern castable is

14. Based on screen analysis the fines (cement, fumed silica, fine alumina) in typical modern castable is

15. The most commonly used binder for refractory concrete is

16. A combination of refractory grain and suitable bonding agent that, after the addition of a proper liquid, is generally poured into place to form a refractory shape or structure which becomes rigid because of chemical action is called

17. Compositions of ground refractory materials develop a strong bond at air ambient temperatures by virtue of chemical reactions within the binder phase that is usually activated by water additions. These refractories include cement and phosphate bonded castables is called:

18. Compositions of ground refractory materials which require relatively high temperatures for the development of an adequate bond (commonly called the ceramic bond) is called

19. Alumina C silica refractories containing 45% or more alumina, materials used in their production include diaspore, bauxite, gibbsite, kyanite, sillimanite, alusite, and fused alumina (artificial corundum) is called

20. A high alumina mineral usually consists of rounded concretionary grains embedded in clay-like mass and is believed to consist essentially of alumina trihydrate (Al2O3 H2O) and alumina hydrate (Al2O3 H2O) in varying proportions is called

21. Commercially on calcined basis bauxite must contain at least

22. A natural or synthetic mineral theoretically consisting solely of alumina (Al2O3), specific gravity 4.00 C 4.02, melting point 3720?

F. (2050? C) Hardness 8.8 is called

23. The selected compression test section of the specimen for the CCs test shall be free from

24. The test specimen of castable refractory for cold crushing strength shall be

25. In API RP 936, the referenced ASTM standard procedure for cold crushing strength and modulus of rupture is

26. Refractories whose major constituent is lime, magnesia, or both and which may react chemically with acid refractories, acid slags, or acid fluxes at a high temperature is known as

27. Refractories containing a substantial amount of silica which is reactive with basic refractories, basic slags, or basic fluxes at high temperatures are known as

28. Cristobalite is an important constituent of

29. A group of impure magnesium silicate minerals that occur in a fiberous form is known as

30. A group of rock minerals having nearly perfect cleavage in one direction and consisting of thin elastic plates and the most common varieties are muscovite and biotite is called