The dragged finish is suitable for only soft stones.

According to Indian Standards, overall thermal transmittance of a wall should not be more than ______ kcal/m2 h deg C.

Reflective sheet materials used as thermal insulating material have _______ reflectivity and ______ emissivity.

Dust of pure _____ is used to cover the article to be treated for corrosion in the method of sherardising.

Smith’s test is used to find out ________

The reciprocal of thermal conductivity is known as ______

Corrosion of ferrous metals is known as _______

Which of the following is not a property pf wrought iron?