The amount of power drawn from the circuit connecting the secondary terminals of an instrument transformer, usually expressed in volt- amperes.

1. The distance from a drill hole to the more or less vertical surface of rock that has already been exposed by blasting or excavating.

2. The volume of the rock to be removed by blasting in a drill hole.

All types of rock or earthy materials overlying bedrock.

1. The material which is melted in a direct arc furnace.

2. In an iron blast furnace, the ratio of iron and flux to coke and other fuels in the charge.