Acidity to phenolphthalein. Total acidity of mine water indicates the
complete capacity of water to produce chemical change by acid reaction. It
is the total amount of acid held in solution or the sum of the quantities
of both the ionized and the un-ionized portions of actual acid and the
potential quantity of acid that can be formed from mineral salts held in
solution. Total acidity is customarily reported in equivalent parts per
million (ppm) by weight of calcium carbonate. The indicated total acidity
of mine water found by currently accepted methods of analysis generally is
greater than the actual total acidity. Felegy
Residue of the mineral matter obtained by incinerating coal under standard
conditions. BS, 5
A drilling term describing the total amount of any load or pressure,
expressed in kilograms, pounds, or tons, that is applied to a bit when it
is in use. Long
A blasting term describing the total time between application of current
and the detonation. Streefkerk
The sum of the free and combined carbon (including carbon in solution) in
a ferrous alloy. ASM, 1
The difference between the total heat content of the air-steam mixture
entering a conditioner per hour and the total heat of the mixture leaving
per hour. Strock, 2
The sum of the sensible and latent heat components that must be removed
from a space to maintain desired conditions. Hartman, 2
a. The total load or pressure that must be applied to a bit for its
optimum rate of penetration in a specific rock. Long
b. The maximum load that can be applied to a bit without causing damage to
the bit. CF:critical pressure
See:slip
The total of the static head (the suction discharge heads), the friction
head, together with any discharge head that must be overcome by a pump is
termed the total dynamic head. Carson, 1
The total energy at any section in a moving fluid consists of the sum of
the internal static, velocity, and potential energies at that section.
Hartman, 2
See:hardness
All waters contain two forms of hardness, i.e., temporary (or carbonate)
hardness, and permanent (noncarbonate) hardness. The combination of the
two is referred to as total hardness. See also:hard water
Nelson
The sum of the elevation head, pressure head, and velocity head of a
liquid. For ground water, the velocity-head component is generally
negligible. AGI
a. The total heat of atmospheric air is the heat contained in the same
amount of dry air (known as sensible heat) plus the latent heat of the
contained water vapor plus the sensible heat of the water vapor above the
wet-bulb temperature. This is called the sigma function or sigma heat.
True total heat or enthalpy is the sigma heat plus the heat of the water
below the wet-bulb temperature. The latter is a very small quantity, and
in mining work sigma heat is always used. Sigma heat is usually measured
above 0 degrees F (-18 degrees C), so that it is the heat that would be
given up if all moisture were condensed out and removed and the air cooled
to 0 degrees F. Some engineers use 32 degrees F (0 degrees C) as the basic
temperature so care should be taken to verify the base used. If absolute
total heat is specified, it is measured above absolute zero (-459 degrees
F or -273 degrees C). Spalding
b. The sum of sensible heat and latent heat in a substance or fluid above
a base point, usually 32 degrees F or 0 degrees F. Strock, 2
In an air lift, the distance water is elevated during pumping. Total lift
equals drop plus static head plus elevation. Also called lift.
Lewis
The vector resultant of the intensity of the horizontal and vertical
components of the Earth's magnetic field at a specified point. Hy
a. Free moisture plus moisture in air-dried coal, both being expressed as
percentages of the sample as received. BS, 5
b. The moisture in the coal or coke as samples. BS, 1
total of correctly placed material
The sum of the weights of material correctly included in the products of a
sizing or density separation, expressed as a percentage of the weight of
the feed to the separator (and equal to 100 minus the "total of misplaced
material"). BS, 5
The sum of the weights of the misplaced material in the products of a
sizing or density separation, expressed as a percentage of the weight of
the feed. When three products are made in a single separator, the total of
misplaced material will be the sum of the weight of material wrongly
placed in each of the three products, expressed as a percentage of the
feed to the separator. BS, 5
See:porosity