Quiznetik

Engineering Physics | Set 5

1. The diagram given below represents which of the following method?

Correct : C. czochralski method

2. In the process of Czochralski method which of the following relation is appropriate between the melt and the growing crystals?

Correct : B. melt and the growing crystals are usually rotated counterclockwise

3. Which of the following statements is appropriate for Stockbarger method?

Correct : B. solidification is achieved by passing the melt through a temperature gradient

4. Which of the following statements describes best the Bridgman method?

Correct : B. melt is inside the temperature furnace, solidification occurs at the cooler end

5. Which one of the following principle has been used in the zone melting method?

Correct : C. impurities concentrate in the liquid phase than in the solid phase

6. Which one of the following statements is correct for precipitation method?

Correct : D. growth of the crystal from a solvent of different composition to the crystals.

7. In the precipitation method for the growth of the crystal, the solvent melts are often known as

Correct : D. fluxes

8. When was the Verneuil flame fusion method first used?

Correct : D. 1904

9. Which of the following method has been used to prepare the single crystals of CaO using plasma torch?

Correct : C. verneuil flame fusion method

10. What is the advantage of using Czochralski, Bridgman- Stockbarger and Verneuil method?

Correct : C. rapid growth rates

11. What is the disadvantage of using a solution growth method for the growth of the crystals?

Correct : C. slow growth rates