ELECTRODE–A metallic rod (welding rod) used in
electric weldingIt melts when current is passed
through it.
ELECTROHYDRAULIC STEERING–A system
having a motor-driven hydraulic pump that creates
the force needed to position the ship’s rudder.
ELECTROLYSIS–A chemical action that takes place
between unlike metals in systems using salt water.
ELECTROMOTIVE FORCE (emf)–A force that
causes electrons to move through a closed circuit,
expressed in volts.
ELEMENT–A substance that consists of chemically
united atoms of one kind.
ENERGY–The capacity for doing work.
ENGINE ORDER TELEGRAPH (EOT)–A device
on the ship’s bridge that is used to give orders to the
engine roomAlso called annunciator.
ENGINEER’S BELL BOOK–A legal record of all
ordered main engine speed changes.
ENGINEERING OFFICER OF THE WATCH
(EOOW)–officer on duty in the engineering
spaces.
ENGINEERING OPERATING STATION (EOS)–
EQUIVALENTS PER MILLION (EPM)–The
number of equivalent parts of a substance per
million parts of another substanceThe word
equivalent refers to the equivalent chemical weight
of a substance.
EROSION–A gradual wearing away, such as a gully
that is eroded by water.
EVAPORATOR–A distilling device that produces
fresh water from seawater.
EXPANSION JOINT–A junction that allows for
expansion and contraction.
FATIGUE–The tendency of a material to break under
repeated strain.
FEED HEATER–A heat-transfer device that heats the
feedwater before it goes to the boiler.
FEEDWATER–Water of the highest possible level of
purity made in evaporators for use in boilers.
FERROUS METAL–Metal with a high iron content.
FIREBOX–The section of a ship’s boiler where fuel oil
combustion takes place.
FIRE MAIN–The saltwater line that provides
fire-fighting water and flushing water throughout
the ship.
FIRE TUBE BOILER–A boiler in which the gases of
combustion pass through the tubes and heat the
water surrounding them.
FLAREBACK–A backfire of flame and hot gases into
a ship’s fireroom from the fireboxCaused by a fuel
oil explosion in the firebox.
FLASH POINT OF OIL–The temperature at which oil
vapor will flash into tire, although the main body of
the oil will not ignite.
FLEXIBLE I-BEAM–An I-shaped steel beam on
which the forward end of a turbine is mounted; it
allows for longitudinal expansion and contraction.
FLOOR (DECK) PLATES—The removable deck
plating of a fireroom or engine room aboard ship.
FLUID–A substance that tends to flow or conform to
the shape of a container.
FLUX–A chemical agent that retards oxidation of the
surface, removes oxides already present, and aids
fusion.
FORCE–Anything that tends to produce or modify
motion.
FORCED DRAFT–Air under pressure supplied to the
burners in a ship’s boiler.
FORCED-DRAFT BLOWERS–Turbine-driven fans
that supply air to the boiler furnace.
FORCED-FEED LUBRICATION–A lubrication
system that uses a pump to maintain pressure.
FORGING–The forming of metal by heating and
hammering.
FRESHWATER SYSTEM–A piping system that
supplies fresh water throughout the ship.
FUEL OIL MICROMETER VALVE–A valve,
installed at the burner manifold, that controls the
fuel oil pressure to the burners.
FUEL OIL SERVICE TANKS–Tanks that provide
suction to the fuel oil service pumps for use in the
fuel oil service system.
FUSE–A protective device that will open a circuit if the
current flow exceeds a predetermined value.
GALLONS PER MINUTE (GPM or gpm)–A unit of
measurement.
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