MM A School Test 3

True / False Steam is used for propulsion and also to supply power generation turbines, forced draft blowers, and distilling plants

True

What is the location of the two steam generating systems on the ship?

Forward main machinery room and After main machinery room

What is the temperature and pressure of main steam that comes from the boiler superheater?

600 psi and steam at 900°F

What is the purpose of the stop and stop-check valves?

Stop valve isolate the boiler from the main steam. Stop-check valve provide two-valve protection.

What is the purpose of the stop check valve on the branch connection that supplies steam to the desuperheater?

Stop the flow going back to the main steam

Guarding valves are installed upstream of the turbine throttle valves to ______ the steam flow to the turbine if the throttle valves are leaking or damaged.

Stop

When water is discharged to the main feed pumps, where does it go?

Main feed piping system

What equipment's purpose is to reduce the temperature of the auxiliary steam for the 150 psi auxiliary steam system?

Desuperheater reducing station

True / False The branch line for the desuperheater leakage test sample cooler is between the outlet of motor operated gate valve and the inlet of the manually operated stop check valve to the 600 PSI steam main

True

What is the purpose of the Emergency Feed and Feed Transfer Pump service air connection?

To supply feedwater to the boiler if the main feed pump fails

How is 600 psi Main Steam and 600 Auxiliary Steam different?

Main steam is supplied from the boiler. Auxiliary steam through two valves, stop-check valve, motor-operated valve.

Each Feedwater System has ______ Main Feed Booster Pumps.

Two motor-driven

(True/False) The Deaerating Feed Tank(DFT) heats and stores seawater

False

What is the main purpose of the Automatic Feedwater Control Valve?

To maintain boiler water level at normal +/- 1 inch

__________ is measured by a static pressure sensor on the top of the boiler steam drum.

Steam drum pressure.

What component maintains feed water pressure?

Speed governors on the main feedback

What measurement is taken as a differential pressure drop in the throat of the venture?

Total steam flow rate.

What measurement is taken as a differential pressure drop across an opening in the feedwater supply piping?

Feedwater flow rate.

What regulating station has an Inlet and Outlet Isolation Valve, Bypass Valve, and a Pneumatically Operated Pressure Regulating Valve?

Gland Seal Regulating Station

The ________ Valve is a spring-loaded, diaphragm operated valve and actuator that requires steam pressure to close.

Self-operated make up valve

The Make-Up Valve and the Unloading Valve Configuration

Same

Non-Condensable Gases Removal System

Gland Exhaust

Labyrinth Packing Repairs

Experienced Individuals

Main Proportion Shaft Maximum Diameter

30 Inch

Propulsion Reduction Gear Function

Reduces Turbines' High-Speed Output

Articulated Locked Train Gear High-Speed Opinions

Two

Material Inside Strut Bearings

Wood or Synthetic Materials

Engineering Equipment with Elaborate Security Measures

Main Reduction Gear

Manned Space Frequency of Entry

60 Minutes

Lube Oil Impact on Wear and Heat Generation

False

Purpose of Temperature Regulating Valves in Lube Oil System

Bypass the cooler

LO Filtering Capabilities in Diesel Engine Systems

Full-flow

What contains procedures, charts, and diagrams for ship's propulsion plant operation?

(EOSS) Engineering Operational Sequencing System

Location of Restore Casualty Checklist

MCRP

Space with cross-connect between two Machinery Rooms

Auxiliary Machinery Room

Where can bulkhead isolation valves be operated from?

Machinery room supplying steam

Component of steam system with deck connections for shore steam

Shore steam riser

Location of 150psi steam supply

600psi desuperheated steam system

Position for Boiler Desuperheater Inlet Valve

Locked open

Precaution for Stack Covers

Removed

The fuel oil (FO) strainer should be cleaned and inspected when the system is pressurized.

False

The watch stander receives orders and reports to____________.

End Space Supervisor

What motor-operated valve may be operated locally and for closure on the BCC, the Damage Control (DC) deck, and the boiler front console?

Desuperheater

The main air ejectors receive their steam supply from what reducing station?

600/150 psi dry

The___________contains control for steam pressure, temperature, and power operated valve-position indicators.

Throttle Control Console

What procedure is conducted on the Ship's Service Turbine Generator?

Shift Expected and Clean

There are____________600/150 PSI dry reducing stations in each main machinery room.

Two

What does the boiler control console contain?

Control for steam pressure, temperature, and power

There are 4 150psi auxiliary steam systems in each machinery room.

False

Excess gland-sealing steam is unloaded to the LP turbine through a .......

Gland seal unloading line

Which component has the same basic configuration and operation as the make-up valve?

Unloading valve

Sections of shafting outside the skin of the ship are usually supported by .......

Strut bearing

Where is the mechanical energy produced by the main engine finally used?

The propellers

Which engineering equipment has long been subject to elaborate security measures?

Main Reduction Gears (MRG)

Spaces shall be considered manned if a roving patrol or system monitor enters the space at least every _____ minutes.

60 Minute

Lube Oil (LO) reduces wear and dissipates heat generated throughout the .......

Propulsion process

How many independent Ship Service Turbine Generators (SSTGs) condensers are in the auxiliary seawater circulating system?

Five

Condensate temperature leaving the hotwell should be within how many degrees of condensing temperature in the condenser?

2°F

What prevents nozzles from being clogged with a foreign material?

Steam strainer

What converts kinetic energy into pressure?

Diffuser

How many Main Condensers in the Condensate System?

2

Which component returns excess condensate to the Reserve Feedwater Tank in response to high-level indication?

The Dump Valve

Which Noncondensing Turbine-Driven Pump does the Auxiliary Exhaust System collect steam from?

Main-Feed Pump

What Valve enables steam flow from the Auxiliary Exhaust Line to the Deaerating Tank when pressure in the Deaerating Tank is less than the exhaust line?

Check Valve

What PSI differential pressure do the Exhaust and Relief Valves (CERV) open to relieve turbine exhaust to the Auxiliary Exhaust System?

2

What is the max allowable temperature of the Superheater Tube during Emergency Boiler Light-Off?

800°F

Which of the following is considered a safety device of the Deaerating Feed Tank (DFT)?

Vacuum Breaker

What are Baffles?

Plates installed to change the flow of fluids

Where are the contents of the Fresh Water Drain Collecting Tanks discharged if transfer pumps are used?

The Condensate-Discharge System

The HP Steam Drain System returns condensate suitable for use as boiler feedwater back into the system via the ...

Deaerating Feed Tank (DFT)

How many degrees (Fahrenheit) does the economizer raise water temperature before it enters the boiler?

100

Which phase is the last phase in the basic steam cycle?

Feed Phase

Feedwater pressure is maintained by which component(s)?

Speed governors on the main feed pumps

What is measured as a differential pressure drop in the throat of the venturi?

Total steam flow rate

From which area does the Automatic Combustion Control System not take its measurements?

Combustion controls

What is the driving force for feedwater to reach the Deaerating Feed Tank (DFT)?

Suction from main or auxiliary condenser

How many total tons of reserve feedwater are contained in the feed tanks?

450 Tons

Where can the Restore Casualty checklist be found?

Master Casualty Response Procedure (MCRP)

What publication contains procedures, charts, and diagrams required for operation of the ship's propulsion plant?

Engineering Operational Sequencing System (EOSS)

Which system provides a means of removing non-condensable gases that are released during the condensing process?

Main engine gland exhaust system

Component with manually operated regulating valve for manual control in case of automatic regulator failure

Bypass valve

Maximum diameter for main propulsion shafts

30 in

Radial bearings generally known as

Journal bearings

Responsibility for custody of reduction gear keys

Engineer Officer

Valve with local position indicator for visual verification of open or closed position

Butterfly valve

Purpose of Lube Oil (LO) strainers and filters in LO system

Remove foreign debris

Best definition of viscosity

Liquid's resistance to flow

Pump circulates cooling water when ship is on standby, going astern, or maneuvering at speeds below __ knots (kt)

12

What is removed via air ejectors or vacuum pumps leaked or discharged into condensers operating under vacuum

Noncondensable gases

Identical superheated steam supply in each Main Machinery Room (MMR)

150 Pounds Per Square Inch (psi)

In the Deaerating Feed Tank (DFT), the auxiliary exhaust steam directly contacts the .......

Condensate

What may be used to temporarily alleviate superheater outlet high temperatures?

Bleeder valve

The sentinel-relief valve lifts at how many pounds per square inch (psi)?

30

What element allows a pipe to be either fully open or fully closed?

Cutout valve

What is the basic function of the economizer?

To act as a preheater

What is measured as a differential pressure drop across an opening in the feedwater supply piping?

Feedwater flow rate

The Make-Up Feed (MUF) system uses a demineralizer to remove contaminants that are present in feedwater coming from the .......

Reserve feed tanks

Primary Engineering Operational Casualty Control (EOCC) training concentrates on controlling .......

Mass casualties

What sections on the Casualty Response Procedures(CRP) are required to be memorized?

Controlling and immediate actions

Where are the Deaerating Feed Tanks (DFT) temperatures and pressure monitored?

Engineering Operating Station (EOS)