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

Which of the following statements is not true about white cast iron?

Rate of the burning of a good fuse is _______

In a chilled water system, the refrigerant is used to cool the air directly while in the direct expansion system, a seco…

Presence of moisture in the thermal insulating material increases thermal insulation while the presence of air spaces de…

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

The process of converting pig iron into wrought iron by stirring in the molten state is called as _____

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