Which tool is used to remove dust from blast holes in the process of blasting?

Which of the following is not a property of cast iron?

Small amounts of _________ and ______ improve the quality of Bessemer pig.

According to the Indian Standards, it is recommended that thermal damping of a wall should not be less than ___

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

Which of the following is also called white mica?

Commonly used fluxing material used in the process of smelting is _______

Which of the following is not a classification of rocks from which building stones are obtained?