MM A School test 2

At what pressure do you shift and clean the fuel oil strainer?

10 PSID

What pressure does the DFT normally operate?

15 psi

To prevent over pressurizing the deaerating feed tank shell, the relief valve is is set at what PSI?

30 psi

Forced draft blowers and soot blowers are supplied by the ___ steam system

600 psi auxiliary

600 psi auxiliary steam is supplied from what system?

600 psi main steam system

What helps prevent a loss of vacuum in the main condenser?

Air ejectors

What prevents motion of water?

Anti vortex baffles

What is used to maintain proper boiler water level?

Automatic feed water control valve

What does the DFT use to preheat condensate?

Auxiliary exhaust and HP drains

Where is the steam from turbines without a condenser sent to?

Auxiliary exhaust steam system

How can you manually control system pressure if a reducing valve fails?

Bypass valve

What are the three methods of training in EOCC?

CRP talk-through CRP walk-through Engineering Casualty Control Exercises

In the generation phase of the basic steam cycle ____ energy is converted into ___ energy?

Chemical - Thermal

Who may authorize a deviation from EOCC?

Commanding officer (CO)

What is the cooling medium for air ejector?

Condensate

What are the four actions of casualty control of with EOCC procedure?

Controlling Immediate Supplementary Restore

What would you use to secure steam from one MMR to another MMR?

Cross-connect valve

What are the two methods of dry boiler lay-up?

Dessicant and heated air

Which component is used to produce 600 auxiliary steam?

Desuperheater

What are the two functions of the sounding tube on a fuel oil tank?

Determine tank level and take samples

What type of heat exchanger is the DFT?

Direct contact

An auxiliary condenser is a ___ pass heat exchanger

Double

Classify the main reduction gear

Double helical Double reduction Articulated Lock train

EOCC is supported by and a sub system of what engineering program?

EOSS

What component preheats the feed water prior to the feed water entering the steam drum?

Economize

What do we use to conduct furnace purge?

Electric force draft blower (FDB)

How do we keep the stern tube from flooding if the main shaft fails?

Emergency inflatable shaft seal

Who authorizes personnel to restore from a casualty?

Engineering officer (EO)

Who trains watch stander personnel on causality control response?

Engineering training team (ETT)

Which component of a steam turbine redirects steam flow from set of moving blades to the next?

Fixed blades

What secures all fuel to an applicable boiler?

Fuel Oil Quick Closing Valve (FOQCV)

Inside a boiler, which tubes make up the the largest bank?

Generating tubes

What is the proper sequence of the basic steam cycle?

Generation Expansion Condensation Feed

What does the 600 PSI Main steam system supply?

HP and LP Turbine SSTG Desuperheater Main feed pump

What do you use to operate the boiler safety valves manually?

Hand easing gear

What steam drainage system uses an orifice as a means to control flow?

High Pressure

What EOCC action prevents a casualty from cascading?

Immediate

What drain system is located outside the main space and operates at 150 PSI and below?

LP Drains

What forms a seal where the turbine shaft extends through the turbine casing, which prevents air from entering the turbine casing and steam from exiting the turbine casing?

Labyrinth packing

What minimizes heat loss and protects the space from high amounts of radiant heat from steam piping?

Lagging

A condenser is a type of heat exchanger that removes what type of heat from steam vapor?

Latent

What is used to hold and support the line shaft?

Line shaft bearing

What component aids in maintaining vacuum in the main condenser by removing air and non-condensable gases?

Main air ejector

If the automatic feed control valve fails, the steam drum water level is controlled using what?

Main feed check valve

Which component provides a means to isolate the boiler from the main steam system?

Main steam stop

What maintains the DFT water level?

Make-up feed and excess condensate pump

In the event of automatic feed water control valve failure, what is used to proper boiler water level?

Manual feed check valve

The speed sensing device mounted on the forward end of the second reduction gear, and is gear driven by the thrust shaft is known as what?

Mechanical counter

In a reaction turbine, both the ___ and ___ act as nozzles?

Moving blades - fixed blades

In a reaction type turbine, the fixed blades and moving blades act as what?

Nozzles

Which component converts the thermal energy of the steam to kinetic energy in an impulse type turbine?

Nozzles

What component secures the steam flow to the turbine during an over speeding condition?

Over speed trip

Axial is ___ to the shaft?

Parallel

What direction does the radial flow turbine rotates?

Perpendicular to the shaft

What are the three primary functions of the DFT?

Preheat condensate Deaerate condensate Store feed water

What is the function of the economizer in the basic steam cycle?

Preheat feed water

What is the mission of EOCC program?

Prevention, minimization and correction of operational and battle casualties to machinery electrical and piping

The bulkhead stuffing box allows the shaft to pass from one space to another and prevent ___ flooding thus maintaining watertight integrity.

Progressive

What type of pump is the main circulating pump?

Propeller

What is the purpose of the main engine guarding valve?

Provide two valve protection and isolation of the HP and LP turbines

What is the purpose of a guarding valve?

Provide two valve protection and isolation of the component it's guarding

What is the purpose of the fuel oil system?

Provides fuel oil to the propulsion boiler and other equipment

What material lines the boiler firebox, which helps minimize heat loss by insulating the boiler and helps contain the temperature within the firebox?

Refractory

What is the purpose of a fuel oil strainer?

Removes solid particles from the fuel

What allows for expansion and contraction between condenser and support structure?

Rubber expansion joints

What are the two types of designs of a shaft seal?

Rubber lip type and mechanical type face seals

What prevents personnel from cutting-in fuel to a secured burner that does not have an atomizer in place or from uncoupling an atomizer that is pressurized with fuel?

Safety shut-off device (SSD)

What are the two ways sea water enters the cooling water circuit in the main condenser?

Scoop injection and main circulating pump

What type of heat exchange is taking place in the economizer?

Sensible heat

What are the three types of tailpipe?

Service system Transfer system Stripping system

Boiler safety valves lift at a set pressure and will reset at ___ pressure.

Significantly lower

Ships with split plants and loop systems exhibit what influencing factor of engineering causality control?

Sound design

What is the purpose of the bulkhead isolation valve?

Start and stop the flow of steam from one space to another

What are the four methods of wet boiler lay-up?

Steam blanket Nitrogen blanket Hydrazine/Morpholine Sodium Nitrate

Which set of tubes do not have water in it or around it?

Superheater

What is the lifting order of boiler safety valves?

Superheater, steam drum 1, steam drum 2

What is the direction a helical flow turbine rotates?

Tangent angle to the shaft

Turbines convert the ___ energy of the steam to___ energy to perform useful work?

Thermal - Mechanical

What regulates the main outlet temperature between 140 and 165 degrees Fahrenheit?

Thermostatic relief valve

What prevents axial movement of the shaft?

Thrust bearing

What are the four sections of the shaft in order?

Thrust shaft Line shaft Stern tube shaft Tail shaft

What is the purpose of the swash plates in the DFT?

To limit movement feed water, caused by the roll of the ship

What are the six methods of classifying a steam turbine?

Type of design and construction Type of exhaust Type and arrangement of staging Repetition of steam flow Division of steam flow Direction of steam flow

How are steam drains in the fresh water drain collecting tank returned back to the basic steam cycle?

Vacuum dragged to the condenser or pumped to the DFT

What prevents oil vapor from getting into the main space while the main engine is in operation?

Vent fog precipitator

Sudden temperature changes in steam piping develop stress. What prevents uneven thermal expansion or contraction of steam piping?

Warm-up and bypass valve

What are the two types of idle boilers lay-up?

Wet - dry

Where is the stern tube located?

Where the shaft passes through the hull of the ship

What component prevents foreign material from entering reduced pressure steam systems?

Y-strainers

Safety devices open at approximately what?

≈ 4 inches of H2O