The mechanism involved in the removal of metal in drilling operation is by_________________?

Question: The atmospheric temperature during melting of ice/snow (in the atmosphere)
[A].

decreases

[B].

increases

[C].

remains same

[D].

may increase or decrease ; depends on the altitude where snow melts

Answer: Option A

Explanation:

No answer description available for this question.

Question: __________ joint is usually used for joining cast iron pipes mostly used for temporary pipelines, where it may be necessary to dismantle & reassemble the pipeline very frequently.
[A].

Collar

[B].

Flanged

[C].

Bell and Spigot

[D].

Expansion

Answer: Option B

Explanation:

No answer description available for this question.

Question: Which of the following pairs regarding the effect of alloying elements in steels are not matched correctly ?
[A].

Cobalt: It contributes to rerl hardness by hardening ferrite.

[B].

Molybdenum: It forms abrasion resisting particles.

[C].

Phosphorous: It improves machinability in free cutting steels.

[D].

Silicon: It reduces oxidation resistance.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Large diameter shafts are manufactured by
[A].

hot rolling.

[B].

cold drawing.

[C].

casting and turning to size.

[D].

forging and turning to size.

Answer: Option D

Explanation:

No answer description available for this question.