Major sources of noise in furnace operation arises from air inspirators, combustion, side wall vibrations and fluctuation in the process heat load. A 50% increase in fuel firing rate may increase the furnace noise level by about __________ decibels.

Question: Fatigue life is expected to increase by
[A].

increasing the size of the sample.

[B].

smooth polishing of the surface of the sample.

[C].

having compressive residual stresses at the surface.

[D].

having tensile residual stresses at the surface.

Answer: Option C

Explanation:

No answer description available for this question.

Question: Often earing defects are found during deep drawing operation, because the
[A].

surface finish of the sheet is poor.

[B].

sheet material has been given substantial spring back.

[C].

starting sheet has planer anisotropy due to its texture.

[D].

starting sheet has normal anitropy due to its texture.

Answer: Option C

Explanation:

No answer description available for this question.

Question: Wood is a/an __________ material.
[A].

amorphous

[B].

cellular

[C].

homogeneous

[D].

grannular

Answer: Option B

Explanation:

No answer description available for this question.