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

MCQOPTIONS

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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