The Al2O3 content of cryolite in Hall-Heroult cell is maintained between _______________ percent ?

Question: In the X-ray radiography technique, the tube voltage for thicker plates as compared to thin plates, should be
[A].

higher, as it gives higher wavelength.

[B].

lower, as it gives higher wavelength.

[C].

higher, as it gives shorter wavelength.

[D].

lower, as it gives shorter wavelength.

Answer: Option C

Explanation:

No answer description available for this question.

Question: __________ is used as a material of construction for the blade of power saw.
[A].

Wrought iron

[B].

Stainless steel

[C].

Mild steel

[D].

High speed steel

Answer: Option D

Explanation:

No answer description available for this question.

Question: In continuous casting of liquid steel, the mould is made of
[A].

water cooled steel

[B].

water cooled copper.

[C].

refractory oxide.

[D].

silicon carbide.

Answer: Option B

Explanation:

No answer description available for this question.