Preheating before welding is done to____________________?

Question: Gross & Net calorific values will be the same for
[A].

methane

[B].

propane

[C].

carbon monoxide

[D].

hydrogen

Answer: Option C

Explanation:

No answer description available for this question.

Question: By X-ray diffraction, it is not possible to determine the
[A].

preferred orientation.

[B].

residual localised stresses.

[C].

particle size.

[D].

ordered arrangement of magnetic moments.

Answer: Option B

Explanation:

No answer description available for this question.

Question: Midrex process of sponge iron production uses reformed natural gas as the reducing agent, which uses iron ore in the form of
[A].

lumps

[B].

pellets

[C].

briquettes

[D].

sinter

Answer: Option B

Explanation:

No answer description available for this question.

Question: If a heat transfer surface is pock-marked with a number of cavities, then as compared to a smooth surface the heat transfer by __________ will not increase.
[A].

convection

[B].

nucleate boiling

[C].

radiation

[D].

conduction

Answer: Option A

Explanation:

No answer description available for this question.