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odor
Scent, a substance that affects the sense of smell, sometimes odors
are disagreeable.
OSHA
Occupational Safety and Health Administration, a Federal agency that
regulates and enforces the safety and health of workers.
offset
(1) terminology referring to the end of a job (process). (2) a
bend.
Ohm
Resistance, as in an electrical current where 1-volt produces
1-ampere.
on-location
Terminology referring to the process of restoring an item at the
loss site.
onset
Terminology referring to the start of a job.
open drying process
The process of drying out a structure after a water loss via open
windows and doors, not recommended unless the outside humidity is
50% or lower.
open web steel joist
A steel truss having a criss cross pattern.
open wiring
A bank of wires supported by porcelain insulators, not in a conduit,
generally used in industrial facilities to feed machinery.
organic
Compounds derived from animals or plants, as well as compounds of
carbon.
oxidant
An oxidizing agent.
oxidation
The process of taking away hydrogen or mixing with oxygen to create
rust, to remove electrons, a chemical reaction.
oxidation number
The number of electrons lost (+) or gained (-) by an atom in a
compound, as compared to the free neutral atoms.
oxidizing agent
Compound or ion that acquires electrons.
oxygen
O, a colorless odorless gas.
ozone
O3, a form of oxygen having three molecules, an oxidizing agent with
a weak chlorine odor, produced naturally through sun light and
lightning, produced commercially by an ozonizer.
ozonization
To treat with ozone, to convert oxygen to ozone using an ozone
generator.
oxyacid
Acid where the hydrogen atom attaches to the oxygen atoms which
allows the created atom to attach to the central atom; sulfuric
acid.
