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

Tar dolomite bricks followed by asbestos.

Fireclay refractory followed by aluminium sheet.

Cotton followed by aluminium foil.

85% magnesia cement and glass wool.

Which of the following is the most widely used heat insulating materia

1.	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» E.

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

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