Material of construction of foundry crucible is _________________?

Question: In a furnace with heating element temperature at 1700°C, the dominant machanism of heat transfer will be
[A].

conduction

[B].

radiation

[C].

natural convection

[D].

forced convection

Answer: Option B

Explanation:

No answer description available for this question.

Question: __________ is the hardest material out of the following.
[A].

Boron carbide

[B].

Tungsten carbide

[C].

Hardened steel

[D].

Silicon carbide

Answer: Option A

Explanation:

No answer description available for this question.

Question: For the Stoke’s law to be valid in the case of a falling sphere in a fluid, the
[A].

Reynolds number (based on sphere diameter) should be < 1.

[B].

flow around the sphere should be in turbulent region.

[C].

sphere must be metallic.

[D].

fluid density should be constant.

Answer: Option C

Explanation:

No answer description available for this question.