Which of the following is used to produce draught in the locomotive boilers ?

Question: Coating provided on the electrodes used in the arc welding is not expected to
[A].

add alloying elements.

[B].

prevent electrode from contamination.

[C].

stabilise the arc.

[D].

provide protective atmosphere to weld.

Answer: Option B

Explanation:

No answer description available for this question.

Question: __________ is a non volatile film forming constituent of a paint.
[A].

Thinner

[B].

Dryer

[C].

Drying oil

[D].

none of these

Answer: Option C

Explanation:

No answer description available for this question.

Question: Machinability of hard alloys & tool steels is improved by
[A].

spherodising

[B].

annealing

[C].

tempering

[D].

normalising

Answer: Option B

Explanation:

No answer description available for this question.

Question: Oxide layer formed on the non-ferrous metal surface after its annealing is
[A].

removed by acid pickling.

[B].

hammered into the surface.

[C].

removed with coarse emery cloth.

[D].

left as such to protect the surface.

Answer: Option A

Explanation:

No answer description available for this question.