____________________ flux is used for the extraction of metal from its self fluxing ores?

Question: Killed steels
[A].

are free from oxygen.

[B].

contain not even traces of sulphur & phosphorous.

[C].

are produced by L.D. process only.

[D].

contain minimum impurity level.

Answer: Option A

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: __________ is not a case hardening process.
[A].

Carburising

[B].

Nitriding

[C].

Cyaniding

[D].

Annealing

Answer: Option A

Explanation:

No answer description available for this question.

Question: A material subjected __________ must have high resilience.
[A].

shockloading

[B].

vibration

[C].

fatigue

[D].

tension

Answer: Option A

Explanation:

No answer description available for this question.

Question: Half life of a radioactive isotope corresponds to the time required for half of the __________ to decay.
[A].

atoms

[B].

neutrons

[C].

nucleons

[D].

electrons

Answer: Option A

Explanation:

No answer description available for this question.