Molybdenum steels containing 0.15 to 0.40% molybdenum

Question: Out of the following, the best material capable of withstanding shock & vibration without the danger of cracking is
[A].

malleable iron

[B].

grey cast iron

[C].

chilled cast iron

[D].

white cast iron

Answer: Option A

Explanation:

No answer description available for this question.

Question: A simple closed grinding circuit may consist of
[A].

a ball mill and a classifier.

[B].

a rod mill and a hydrocyclone.

[C].

a jaw crusher and a hydrocyclone.

[D].

a ball mill and a froth floatation cell.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Dowtherm is a
[A].

high temperature heating medium (a petroleum product).

[B].

product of coal tar distillation.

[C].

very heat sensitive material.

[D].

none of these.

Answer: Option A

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.

Question: A steam pipe is intended to be insulated with two layers of insulating materials of different thermal conductivities. For minimum heat transfer to take place
[A].

the better insulation material should be put just next to pipe (i.e., inside).

[B].

the better insulating material should be put outside.

[C].

either of the insulating material could be put on either side.

[D].

steam temperature is considered before deciding as to which insulating material is to be put inside (i.e., just next to the pipe).

Answer: Option A

Explanation:

No answer description available for this question.