# Shared Flashcard Set

## Details

Naval Engineering
NS 102
64
Engineering
12/06/2012

## Additional Engineering Flashcards

Term
 Devices to measure temperature and pressure
Definition
 Temp: expansion thermometers, pyrometersPressure: monometers, bourdon tube
Term
 coversion: farenheit to rankine Celcius to kelvin
Definition
 F= R - 460C= K - 273
Term
 1st and 2nd laws of thermodynamics
Definition
 first: no destroy energy, only created and transferredsenond: no completely efficient thermo cycle (heat into work)
Term
 Latent heat of vaporization vs. fusion
Definition
 vaporization: E required to change a fluid from a liquid to a vaporfusion: E required for object to melt
Term
 modes of heat transfer
Definition
Term
 5 basic elements of all cycles
Definition
 working substance, heat source, engine, heat sink, pump or compressor
Term
 two types of pumps
Definition
 positive displacement: volume of fluid displaced during each cycleimpeller
Term
 two types of valves
Definition
 Stop and Check
Term
 Stop valves
Definition
 globe, gate, ball, butterfly(used to shut of flow)
Term
 check valves
Definition
 swing, ball, lift(used to permit flow in 1 direction)
Term
 Components of Steam cycle
Definition
 boiler, steam turbine, condenser, condensate pumps, DFT, feed pump
Term
 Phases of working fluid in steam cycle
Definition
 generation, expansion, condensation, feed
Term
 Types of steam turbines
Definition
 Rateau (impulse), Parsons (reaction)
Term
 Rateau Steam turbine
Definition
 impulse, steam hits blades at high velocity, moves blades by a direct push and exits at lower velocity
Term
 Parsons Steam Turbine
Definition
 reaction, fixed vane, nozzles increase velocity and moving vane blades move by a reaction force or kickback
Term
 Why Navy uses Nuclear Power
Definition
 unlimited range/ enduranceno need for outside material (air)smaller engineering spaces and fuel
Term
 modes of radioactive decay
Definition
 alpha, beta, gamma, spontaneous fission
Term
 Fission process (where does energy come from?)
Definition
 235/92 U + 1/0 n = FF1 + FF2 + (2)1/0 n + KE (difference in binding E)
Term
 Critica
Definition
 fission rate just sustained by the minimum number of thermal fissions (Keff=1)
Term
 Subcritical
Definition
 fission rate is decreasing since not enough thermal neutrons are produced to maintain fission reactions (Keff < 1)
Term
 Supercritical
Definition
 fission rate increasing since more than necessary thermal neutrons created (Keff > 1)
Term
 How to control fission?
Definition
 -control rods, delayed neutrons, moderator (water)
Term
 reactor plant primary loop components
Definition
 containment structure, control rods, reactor, steam generator, steam line, pump, generator, turbine, cooling water condensor, cooling tower
Term
 How reactor Power follows Steam Demand
Definition
 -power inversely proportional to moderator temp
Term
 Four Strokes of Diesel Engine
Definition
 Intake, Compression, Power, Exhaust (suck, squeeze, bang, push)
Term
 Two stroke vs. four stroke
Definition
 2: higher power to weight ratio, less complicated valve train4: more efficient burning process, as size increases, power:weight improves
Term
 How common shaft design allows turbine to spin compressor and therefore the turbine is self sustaining
Definition
 common shaft between compressor and turbine, and turbine/propulsion power. continue movement after certain rpm
Term
 Why do ships with GTE have to have a controllable pitch propeller
Definition
 Turbine only operates at certain speed, change propeller pitch to slow down
Term
 Reduction Gears
Definition
 -straight, helical, double helical-combines two turbines to common shaft
Term
 Thrust Bearing purpose
Definition
 absorbs axial force and propells ship forward
Term
 Reverse Osmosis
Definition
 water through membrane, high pressure, multi-stage
Term
 Diesel
Definition
 -high efficiency @ all loads, low initial cost, reliable, few operators-large, noisey, heavy, high maintenance
Term
 GTE
Definition
 -light, short startup, reliable, quiet-large amount of air, large fuel storage
Term
 Conventional Steam
Definition
 -reliable, aux functions, eff @ cruising-large, lots manpower, long start-up
Term
 Nuclear
Definition
 -endurance, reliable, speed, no air-high cost, heavy, long start-up
Term
 Why Use Hydraulics?
Definition
 -shapelessness, incompressibility, transmission of force (equally and undiminished)
Term
 Basic Hydraulics Problem
Definition
 F = P * A
Term
 Resistor
Definition
 opposes flow of current through circuit
Term
 Current
Definition
 flow of electrical charges though a conductor
Term
 Voltage
Definition
 force which causes electrons to move
Term
 Generator Action
Definition
 magnetic field, conductor, relative motion between the two
Term
 Motor Action
Definition
 magnetic field, conductor, current flow in conductor
Term
 Basic circuit Rules
Definition
 V=IR , P=VI
Term
 Resistors (parallel and series)
Definition
 series = + , parallel = 1/reciprocals
Term
 Why 3 phase AC
Definition
 -AC more power than DC for same size-more power than a single phase can operate with 2, but redundancy, faults
Term
 Electrical Safety
Definition
 rubber gloves, rope man, announce it, isolate
Term
 Selective Tripping
Definition
 faults ar eisolated as close to the fault as possible and furthest from power supply. done via fuses, switches,and breakers
Term
 ABT
Definition
 allow transfer of load from one bus to another (normal to alternate), senses voltage loss of quickly and auto transfers supply to alternate source to ensure continuity of power
Term
 Compressed Air compressors
Definition
 -positive displacement: high pressure-centrifugal: high output
Term
 Uses for compressed air
Definition
 -high: torpedo ejection, emergency blow-low: potable water, pneumatic tools
Term
 Refrigeration Cycle
Definition
 -Condensor and Receiver-Expansion Device-Evaporator-Compressor
Term
 Uses of Refrigeration
Definition
 food, electronics, armament
Term
 Freeboard
Definition
 vertical distance between top of hull and waterline
Term
 Draft
Definition
 distance from waterline to lowest point of ship (keel)
Term
 Keel
Definition
 centerline backbone of ship, runs the lenght of the ship
Term
 Compartment Numbering
Definition
 Deck - Frame - Compartment - Use
Term
 Free Surface Effect
Definition
 compartment partially filled with water and causes reduction in GM = stability down
Term
 Flooding types
Definition
 solid, partial, in communication with the sea
Term
 Alpha Fire
Definition
 -ash fires-water
Term
 Bravo Fire
Definition
 -fuel-AFFF
Term
 Charlie Fire
Definition
 -Electrical-CO2 and Halon
Term
 Delta Fire
Definition
 -metal-water or overboard
Term
 MAIDS Report
Definition
 man in charge, assistance, injured personnel, damage, Status of casualty
Term
 Breathing Equipment
Definition
 -SCBA-EABs
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