STEAMING WATCHWatches stood when the main
engines are in use and the ship is underway.
STEAM LANCEA device that uses low-pressure
steam to remove soot from inside boilers and to
remove carbon from boiler tubes.
STEERING ENGINEThe machinery that turns the
STERN TUBEA watertight enclosure for the
STRAINThe deformation, or change in shape, of a
material that results from the weight of an applied
STRENGTHThe ability of a material to resist strain.
STRESSA force that produces or tends to produce
deformation in a metal.
STUFFING BOXA cavity in which packing is placed
to prevent leakage between a moving shaft and a
fixed part of a valve or pump.
STUFFING TUBEA packed tube that makes a
watertight fitting for a cable or small pipe passing
through a bulkhead.
SUMPA container, compartment, or reservoir used as
a drain or receptacle for fluids.
SUPERHEATERA unit in the boiler that dries the
steam and raises its temperature.
SWASHPLATESMetal plates in the lower part of the
steam drum that prevent the surging of boiler water
with the motion of the ship.
SWITCHBOARDA panel or group of panels that
distribute electrical power throughout the ship,
normally with automatic protective devices.
TAKE LEADSA method of determining bearing
TANK TOPThe top side of tank section or double
bottom of a ship.
TOP DEAD CENTER (TDC)The position of a
reciprocating piston at its uppermost point of travel.
TEMPERINGThe heating and controlled cooling of
a metal to produce the desired hardness.
THIEF SAMPLEA sample of oil or water taken for
THROTTLEMANThe person in the engine room
who operates the throttles to control the main
THRUST BEARINGA bearing that limits the end
play and absorbs the axial thrust of a shaft.
TOP OFFTo fill up a tankA ship tops off its tanks with
fuel oil before leaving port.
TORQUEThe force that produces or tends to produce
TOUGHNESSThe property of a material that enables
it to withstand shock as well as to be deformed
TRANSFORMERAn electrical device used to step up
or step down an ac voltage.
TRICK WHEELA steering wheel in the steering
engine room or emergency steering station of a ship.
TUBE EXPANDERA tool that expands replacement
tubes into their seats in boiler drums and headers.
TURBINEA multibladed rotor driven by steam,
gas, or water.
TURBINE STAGEOne set of nozzles and
succeeding row or rows of moving blades.
TURBINE TURNING GEARA motor-driven gear
arrangement that Slowly rotates idle propulsion
shafts, reduction gears, and turbines.
UPTAKES (EXHAUST TRUNKS)Large enclosed
passages that direct the flow of exhaust gases to the
VACUUMA space that has less than atmospheric
pressure in it.
VENTA valve in a tank or compartment that primarily
permits air to escape.
VISCOSITYA liquids resistance to flow.
VOIDAn empty, watertight compartment separating
VOLATILEThe term that describes a liquid that
VOLTAGEElectric potential (emf).
VOLTAGE TESTERA portable instrument that
WATER TUBE BOILERBoilers in which the water
flows through the tubes and is heated by the gases
WATER WASHINGA method of cleaning to remove