Question

Which of the following is the most widely used heat insulating material for pipelines carrying steam ?

a.

Tar dolomite bricks followed by asbestos.

b.

Fireclay refractory followed by aluminium sheet.

c.

Cotton followed by aluminium foil.

d.

85% magnesia cement and glass wool.

Answer: (d).85% magnesia cement and glass wool.

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Q. Which of the following is the most widely used heat insulating material for pipelines carrying steam ?

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