The toughness of stone is said to be high if the value of the toughness index exceeds ______

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

The process of direct transmission of heat through a material is known as ______

In which of the following rocks, clay predominates?

The process of puddling is carried out in a ____

Which of the following is not a quality of a good thermal insulating material?

Which of the following is the correct relationship between thermal resistance and thermal conductivity?

Which variety of cast iron is obtained by melting cast iron with wrought iron scrap?