An isometric mineral, Sb2 O3 ; dimorphous with valentinite;
resinous; Mohs hardness, 2 to 5; sp gr, 5.2 to 5.3.
A monoclinic mineral, Cu2 (UO2 )2 V2 O8
.6H2 O ; yellow-green.
The difference between the total cooling effect and the dehumidifying
effect. Strock, 2
a. Thermal energy, the transfer of which to or from a substance results in
a change of temperature. CF:latent heat
b. The heat added to a body when its temperature is changed.
c. The sensible heat of a body is the heat given off when it cools to
ordinary temperature. Newton, 1
sensitive earth fault protection
A system of earth fault protection in which the fault current is limited
by design to a low value which generally requires amplification in order
to operate an earth fault relay. In the case of three-phase
alternating-current systems, the limitation of the leakage current may be
effected by either (1) inserting a current-limiting device between the
neutral point of the system and earth (single-point earthing), or (2)
connecting, in each circuit to be protected, all phases, in star, through
current-limiting devices, each star point being connected to earth through
an earth leakage protective device (multipoint earthing). BS, 13
The property in a high explosive that permits it to be exploded by a
shock. The more insensitive an explosive is, the stronger detonator it
requires to develop the full strength.
See:gypsum plate; selenite plate.
a. In explosives, a measure of the ease with which a substance can be
caused to explode and its capacity to maintain explosion through the
length of a borehole. Nichols, 3
b. The least change in an observed quantity that can be perceived on the
indicator of a given instrument. AGI
c. The displacement of the indicator of a recording unit of an instrument
per unit of change of a measurable quantity. AGI
d. The effect of remolding on the shear strength and consolidation
characteristics of a clay or cohesive soil. A sensitive clay is one whose
shear strength is decreased to a fraction of its former value on remolding
at constant moisture content. See also:sensitivity ratio
A measurement of the sensitivity of a clay to the action of remolding.
Hammond
Sensitivity to propagation of an explosive can be ascertained by a method
called the Ardeer double-cartridge, or ADC, test. The ADC test consists of
firing an explosive cartridge with a standard detonator and determining
the maximum length of the gap across which the detonation wave will travel
and detonate a second, or receptor, cartridge. Both the primer and the
receptor cartridges should be of the same composition, diameter, and
weight. McAdam, 2
The component of an instrument that converts an input signal into a
quantity measured by another part of the instrument. Also called sensing
element. Hunt
A drainage system in which sewerage and surface water are carried in
separate sewers. See also:surface-water drain
separate tandem electric mine locomotive
An early term for auxiliary ventilation. Nelson
a. A vessel containing dense medium in which the feed material is
separated on a commercial scale into different fractions according to
specific gravity. BS, 5
b. The liquid in a separating bath. BS, 5
Dense medium of the density required to achieve a given separation.
BS, 5
The distance between any two parts of an index plane (e.g., bed or vein)
disrupted by a fault. See also:horizontal separation;
vertical separation; stratigraphic separation. AGI
Eng. Coal that has been prepared by screening or washing.
The effective density at which a separation has taken place, calculated
from a specific-gravity analysis of the products; commonly expressed as
either partition density or equal errors cut point (density).
BS, 5
Minimum recommended distance between explosive materials and other
materials or specific locations.