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

A. Ductility
B. Fluidity & castability
C. Strength
D. Malleability

A. Increases its melting point
B. Does not affect its melting point
C. Decreases its melting point
D. Makes it malleable

A. Dilute H2SO4
B. Dilute HNO3
C. Dilute HCl
D. Hydrofluoric acid

A. Magnetic properties
B. Cutting hardness
C. Corrosion resistance
D. Ductility

A. Lead lined concrete vessel
B. Wood
C. Metal
D. Either B. or C.

A. Its casting unsound
B. Its hard and machinable
C. Its brittle and malleable
D. All A., B. & C.