ELECTRODEA metallic rod (welding rod) used in
electric weldingIt melts when current is passed
ELECTROHYDRAULIC STEERINGA system
having a motor-driven hydraulic pump that creates
the force needed to position the ships rudder.
ELECTROLYSISA 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.
ELEMENTA substance that consists of chemically
united atoms of one kind.
ENERGYThe capacity for doing work.
ENGINE ORDER TELEGRAPH (EOT)A device
on the ships bridge that is used to give orders to the
engine roomAlso called annunciator.
ENGINEERS BELL BOOKA legal record of all
ordered main engine speed changes.
ENGINEERING OFFICER OF THE WATCH
(EOOW)officer on duty in the engineering
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.
EROSIONA gradual wearing away, such as a gully
that is eroded by water.
EVAPORATORA distilling device that produces
fresh water from seawater.
EXPANSION JOINTA junction that allows for
expansion and contraction.
FATIGUEThe tendency of a material to break under
FEED HEATERA heat-transfer device that heats the
feedwater before it goes to the boiler.
FEEDWATERWater of the highest possible level of
purity made in evaporators for use in boilers.
FERROUS METALMetal with a high iron content.
FIREBOXThe section of a ships boiler where fuel oil
combustion takes place.
FIRE MAINThe saltwater line that provides
fire-fighting water and flushing water throughout
FIRE TUBE BOILERA boiler in which the gases of
combustion pass through the tubes and heat the
water surrounding them.
FLAREBACKA backfire of flame and hot gases into
a ships fireroom from the fireboxCaused by a fuel
oil explosion in the firebox.
FLASH POINT OF OILThe temperature at which oil
vapor will flash into tire, although the main body of
the oil will not ignite.
FLEXIBLE I-BEAMAn I-shaped steel beam on
which the forward end of a turbine is mounted; it
allows for longitudinal expansion and contraction.
FLOOR (DECK) PLATESThe removable deck
plating of a fireroom or engine room aboard ship.
FLUIDA substance that tends to flow or conform to
the shape of a container.
FLUXA chemical agent that retards oxidation of the
surface, removes oxides already present, and aids
FORCEAnything that tends to produce or modify
FORCED DRAFTAir under pressure supplied to the
burners in a ships boiler.
FORCED-DRAFT BLOWERSTurbine-driven fans
that supply air to the boiler furnace.
FORCED-FEED LUBRICATIONA lubrication
system that uses a pump to maintain pressure.
FORGINGThe forming of metal by heating and
FRESHWATER SYSTEMA piping system that
supplies fresh water throughout the ship.
FUEL OIL MICROMETER VALVEA valve,
installed at the burner manifold, that controls the
fuel oil pressure to the burners.
FUEL OIL SERVICE TANKSTanks that provide
suction to the fuel oil service pumps for use in the
fuel oil service system.
FUSEA protective device that will open a circuit if the
current flow exceeds a predetermined value.
GALLONS PER MINUTE (GPM or gpm)A unit of