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98 Cards in this Set

  • Front
  • Back
Bimetallic Strip
different metals expand at different rates causing it to uncurl
different metals in contact produce a voltage based on temp.
measures voltage from a change in resistance to get temp
Liquid in Glass
fluid expands based on temp
uses different heights of a fluid to measure pressure
Bellows Gage
expands against a spring based on pressure
Force per unit area
a. Internal Kinetic Energy
b. conduction
c. radiation
d. work
e. heat
a. energy associated with the activity of molecules
b. heat flow from hot to cold via contact
c. heat transfer that does not include contact
d. mechanical energy in transition
e. thermal energy in transition
a. latent heat
b. subcooled heat
c. latent heat of vaporization
d. saturated liquid
a. heat added results in physical change
b. liquid at specific pressure that is below Tsat
c. amount of heat necessary to change liquid to vapor w/o changing temp
d. liquid at a specific pressure which is at Tsat for a pressure
In main steam cycle, turbin converts (blank) energy to (blank) energy
thermal; mechanical
boiler economizer
utilizes waste heat by heating feedwater
removes air from feedwater, heats feedwater, stores feedwater
when is working substance at lowest temp in steam cycle?
pressure in main condenser during normal operation
28" Hg vacuum
main air ejectors remove air from non-condensible gages from...
main condenser
essential to closed thermodynamic cycle
heat receiver, pump, heat source, working substance, engine
steam exhausting into the air ejector condensor is changed into water when it comes in contact with tubes through which
seawater flows
purpose of main feed booster pump
prevent water from flashing to steam in main feed pump
feedwater regulator control
maintains water level in boiler/steam generator
main circulating pump
provides cooling water to main condensors at low ship speed
sequence of four stroke engine
power, exhaust, intake, compression--if starting at top of its stroke
slow neutrons
cause fission
control rods
control neutron population
a. alpha
b. beta
c. gamma
d. neutron
a. helium nucleus, stopped by skin, paper
b. high energy electron, stopped by clothes
c. high energy photon, stopped by lead or water
d. fast or thermal. stopped by borated polyester
a. TDC
b. BDC
c. Camshaft
d. flywheel
e. crankshaft
f. crankcase and oil sump of piston travel
b. bottom of piston travel
c. transmits power from fuel to exhaust valves
d. helps ensure smooth operation of crankshaft
e. transmits power to pistons and receives power from pistons
f. bolted to cyliner block, holds oil for pistons
First law of thermodynamics
energy can not be created or destroyed, only transfered
Second law of thermo
no cycle can have thermal efficiency of 100%
advantages of GTE
weigh less, cost less, less persons needed, more effiecient, simplicity, less vibrations, modular replacements
measure of disorder in a syster
combination of internal energy and flow work
primary air
30%, used for combustion
secondary air
65%, injected into combustion changed to cool combustion gasses
film air
5%, protects turbine
reactor is critical
neutrons produced = neutrons used, power is constant
phases of main steam cycle
1. generation
2. expansion
3. condensation
4. feed
net positive suction head
regulates pressure to prevent formation of cavitation
a. open/ closed cycle
b. heated/unheated cycle
steam: closed, unheated
GTE: open, unheated
Diesel: open, heated
Spruance class destroyer:
# gas turbines, # shafts in operation
full power: 4, 2
split plant: 2, 2
trail: 1, 1
reduction gears
prime purpose: allow prime mover and propeller to operate at most efficient speeds
double helical reduction gear
two sets of gear teeth cut at opposite but comp. angles across face of gear
Kingsbury Thrust Bearing
absorbs axial thrust transmitted by shaft and delivers thrust to hull of ship
oil system service tank
contains 24 hour supply of fuel and is for immediate use
vapor-compression distillation unit
distilling unit found on ships without steam plants
flash type distilling unit
flash chamber kept at a vacuum to allow feed to boil at lower temp
Waterbury Pump
varying the tilting box angle alters the capacity and direction of flow from the pump without changing speed or direction of prime mover
conductors in which output voltage is induced
slip ring and brushes
provide electrical current to rotor windings
allows a voltage change with no moving parts
articulated reduction gear
first reduction gear connected to second pinion by quill shaft
double reduction gear
speed reduction in two steps
locked train reduction gear
power distributed equally by two sets of gear/shafts from high speed pinion to bull gear
device that sense a loss of power from a normal source and will automatically connect it to an alternate source
Non-vital loads
not required for the safe operation of the ship
Circuit Breaker
an electrical device that opens when the current exceeds a predetermined value
contains busswork and distributed electrical power from gerneator to various circuits
vital loads
have multiper power sources and are usually connected via ABT
degaussing system
removes magnetic signature of the ship
air compressor operating at 4500psig
considered a High pressure air compressor
chilled water circulating system
air conditioning system in which water is cooled in the evaporator and circulated throughout the ship
heat exchanger in which refrigerant rejects heat to a cooling medium
methods to purify oil
1. strain
2. purifiers
3. coalesars
4. filters
lump oil pumps
hydraulic advantages
safer, reliable, able to go long distances, variable speed control
hydraulic disadvantages
needs filtration, highly flamable
applications of hydraulics
stearing, weapons systems, deck machinary, mast/ antenna for subs
revolving field vs revolving armature
field has less voltage going through slip ring and brushes therefore giving the brushes a longer life since they can't handle high voltages
3 elements to induce an EMF
magnetic field, conductor, relative motion btw the two
why use ungrounded electrical systems?
continuity of power
why is moisture in a high pressure system bad?
it will freeze during expansion
deck under compression
keel under tension
deck under tension
keel under compression
location of 2-15-3-C
2: deck number, main is 1
15: frame
3: compartment, centerline of ship is 0, port-odd, starbird-even
C: use
design considerations for ship building
seaworthiness(stability, displacement, freeboard), structural integrity(engr design, weight), operational employment(mission, armament, maneuverability), trade-offs (cost, lifespan)
how does a sub surface?
air fills balace tanks, air more dense than water
initial damage reports
M:man in charge
A:assistance needed
D:damage assessment
S:status of casualty
4 classes of fire
A:ash-put out by water
D: metals or non A,B,C
two pieces of damage eqip available to scene leader
portable fire extinguisher, DC tool Roll, overhaul equip, atmosphere monitering equip
3 phases of DC
prevent, minimize effects, restore ship to effective fighting unit
as draft increases, what happens to center of buoyancy? (CB)
CB will rise, geometric center of the ship
free surface effect
occurs when a compartment or tank is only partially full, minimized if 3/4 or 1/4 full
two forces equal in magnitude but opposite in direction
the point where the intersection of a vertical line drawn through the center of buoyancy of a slightly listed vessel intersects with the centerline plane.
drawbacks to PMS
requires human involvement; work still must get done,even if you don't have enough people; improper maintenance
i maintain current unit instructions and designate QPO's I also reinforce command emphasis on PQS
what's on a MRC
maintenance requirement card; instruction for individual PMS; step by step prodecure; lists safety precautions; individual who much do work
Heeling over
when a distributing force exerts an inclining moment on a ship, will heel at an angle
material conditions of readiness
X-least prtection when no danger of attack
Y-set and maintained at sea and in port at wartime or outside working hours
Z-set during GQ
special classifications
W-sea suction vales and fittings which serve vital systems
Circle X,Y-may be open only with special permission but then secured after use
More special classifications
Circle Z-red circle, opened only with permission of CO during GQ
Circle W-black circle, ventilation fittings
Dog Z- fittings closed to darken ship
Respiratory equip
types of PQS
watch station (EOOW, OOD)
equip operator
special evolutions
all hands - DC, ship quals
PQS booklet
-table of contents
approves qual cards and serves as final approval authority in PQS
PQS Coordinator
-officer or senior enlisted
-maintains PQS material
who is responsible for admin of departamental PQS, designates QPOs for department
department head
who supervises all divisional PQS, maintains documentation for division
division officer
maintenance material management
how does 3M work?
1. 43-P1-mast book, updated semi-annually
2. cyclic schedule
3. quarterly schedule
4. weekly schedule
5. MRC