A nozzle is a device, which

Question: Ageing of steel refers to the
[A].

degradation of steel by corrosion.

[B].

failure of steel structure by overstress-ing.

[C].

return of sharp yield point in temper rolled low carbon sheet after a period of time.

[D].

decarburisation of steel by overheating.

Answer: Option C

Explanation:

No answer description available for this question.

Question: Current employed in resistance welding ranges from __________ kVA/cm2 .
[A].

1.2 to 2.5

[B].

4.5 to 6.2

[C].

7.5 to 8.5

[D].

10.5 to 15.5

Answer: Option B

Explanation:

No answer description available for this question.

Question: Identify the correct statement with reference to the extractive metallurgy of aluminium.
[A].

The electrolyte consists of molten Na3AlF6 with approximately 1 to 8% Al2O3.

[B].

Approximately 80% of the aluminium deposited on the cathode comes from cryolite.

[C].

Sodium is deposited along with aluminium, but is immediately vaporised.

[D].

Anode effect sets in when the cryolite concentration goes below 40%.

Answer: Option A

Explanation:

No answer description available for this question.