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coxswain pt2 > ENGINEERING > Flashcards

ENGINEERING Flashcards

1
Q

DISABLING CASUALTY

A

BOAT IS NOT SERVICABLE
NOT AUTHORIZED TO GET UNDERWAY
NOTIFY OPERATIONAL COMMANDER IMMEDIATELY

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2
Q

RESTRICTIVE DISCREPANCY

A

BOAT AND CREW CANNOT PERFORM ALL MISSIONS SAFELY
OPERATIONS RESTRICTED
NOTIFT OPERATIONAL COMMANDER IF REPAIRS CANNOT BE MADE IN ONE HOUR

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3
Q

MAJOR DISCREPANCY

A

BOAT AND CREW CAN PERFORM ALL MISSIONS BUT SOME DEGRADATION IN EFFECTIVENESS OR READINESS SHOULD BE EXPECTED
OPERATIONS UNRESTRICTED
DISCREPANCY OCURRENCE AND REPAIR IS DOCUMENTED

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4
Q

DISABLING CASUALTY EXAMPLE

A

Reduction gear pressure below 186 psi (while engaged).
Reduction gear pressure below 15 psi or above 65 psi (while
disengaged).
Reduction gear oil temperature above 193° F at 2300-2350 RPM
Engine lube oil pressure below 31 psi at 2300-2350 RPM
Engine lube oil pressure below 10 psi at 650 RPM
Engine coolant temperature below 140° F or above 211° F
Engine fails to start.
Uncontrollable overheat.
Water in engine lube oil (emulsified white milky oil).
Lube oil in engine jacket water
No electronic means of signaling distress (i.e. no radio etc.).
Electronics will not energize
Electrical arcing and sparking.
Fixed (FM-200) fire suppression system or engine room air damper
inoperative
No portable fire extinguishers (unserviceable).
Emergency alarms and indicator lights, where applicable, inoperative
(smoke, high heat, carbon monoxide, bilge, hydraulic, lube oil
pressure, high water temperature, VECTOR Alarm Display Panels).
Any water or oil leaking from the water jet bearing housing weep hole.

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5
Q

RESTRICTIVE DESCREPANCY EXAMPLE

A

Engine performance:
(01) Maximum RPM under load (norm 2300) – less than 2200 RPM.
(02) Engine coolant temperature between 186° F and 211° F.
Leaks more than 15 drops per minute:
(01) Jacket Water
(02) Raw Water
(03) Lube Oil
(04) Hydraulic Fluid
(05) Marine Gear Oil
Fuel oil dripping* (falling onto a surface which is not hot). One drop
within ten (10) minutes.
Bilge pumps inoperative.
Inaccurate pressure/temperature/fire alarms.
Any detectable exhaust leaks.
Missing exhaust lagging.
Failure of any emergency system:
(01) Fuel shut off valves do not fully close.
Loose/missing fittings, nuts, bolts, brackets, etc.:
Missing or loose shafting bolts:
(01) Torsional coupling
(02) Cardan shaft
(03) Gear output flange
(04) Waterjet gearbox flange
Steering and bucket system:
(01) Tie rod
(02) Feedback sensor mounting
Undersized engine mounting bolts and/or constructed of inferior grade
material.
Battery box cover missing or not secured properly.
Unauthorized batteries
Cracked, damaged or missing boat crew seat frames.
Missing/loose/damaged hardware that mounts the boat crew seating to
the deck foundation.
Inoperable or missing shock mitigation, boat crew seat belts, pistol grips,
and armrests.
Any significant tear or rip in upholstery and/or cushioning that impacts
the functionality of the boat crew seat system
Compass:
(01) Deviation table missing.
(02) Compass deviation greater than 5°.
Electronics:
(01) VHF-FM radio inoperative.
(02) Depth sounder inoperative.
(03) DGPS/GPS inoperative.
(04) Radar inoperative
Engine Compartment fire suppression system pressure switches not
operating properly.
Fire extinguishers not secured in brackets.
Water Tight Integrity:
(01) Holes/cracks in a watertight structure.
(02) Cracks through a watertight scuttle/hatch.
(03) Failure of a watertight closure/ window seal.
(04) Any noticeable gap at gasket seams.
Applied non-skid on main decks ineffective/missing (any traffic/working
area without non-skid for an 8 ½ inch x 11-inch area).
Navigation light(s) inoperative or incorrect configuration / displaying
incorrect lighting characteristics.

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6
Q

MAJOR DISCREPANCY EXAMPLE

A

Leaks less than 15 drops per minute:
(01) Jacket Water
(02) Raw Water
(03) Lube Oil
(04) Hydraulic Fluid
(05) Marine Gear Oil
Any fuel leak (piping/fittings/tank) that drips less than one drop within
ten minutes.
Bilge pump hoses missing hose clamps.
One generator not operating properly.
Loose/missing fittings, nuts, bolts, brackets, etc.: *
(01) Hardware on the engines used for attaching equipment.
(02) Battery terminals loose or corroded.
(03) ECM cables loose or disconnected.
Fluid levels below minimum required.
Engine guards inadequate/missing around moving machinery.
(01) Compass light inoperative
(02) Expired deviation table
(03) Any standard boat electronics, except for those listed on the disabling
or restrictive lists, not operating properly.
Watertight Integrity:
(01) Improperly filled holes.
(02) Hardware bolted through a watertight hatch, scuttle, or bulkhead.
(03) Loose dogs/dogging arms on watertight hatch, scuttle, or
bulkhead.
Scuttle not flush with the deck, causing a tripping hazard.
Inability to open or close doors, hatches, or scuttles.
Hatch and scuttle safety locks do not engage when item is in the open
position.
Missing breaker or open hole in any power circuit breaker panel.
Any portable fire extinguisher missing, unserviceable including
improper PMS completion and recording.
Any loose parts or hardware that may impact the functionality of the
boat crew or survivor seat system. Any boat crew or survivor seat
system failure, damage or flaw (i.e. tears or rips), except for those listed
under Restrictive Discrepancies

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7
Q

LUBE OIL PRESSURE

A

@2300RPM - NORMAL : GREATER THAN 41 PSI,
DISABLING - LESS THAN 31 PSI (ALARM SOUNDS AT 30PSI)

@650RPM - NORMAL : GREATER THAN 10 PSI
DIABLING - LESS THAN 10 PSI

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8
Q

RAW WATER/ JACKET WATER (FRESHWATER) TEMPERATURE

A

NORMAL : 140-185 DEGREES
RESTRICTIVE: 186-211 DEGREES
DISABLING : @212 DEGREES (ALARM SOUNDS)

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9
Q

REDUCTION GEAR : RATION 1.02:1

A

PRESSURE ENGAGED - NORMAL: 185-250 PSI
DISABLING - LESS THAN 185 PSI

PRESSURE DISENGAGED - NORMAL : 14-15 PSI
DISABLING - LESS THAN 15 PSI OR GREATER THAN 65 PSI

TMEPERATURE - 130-185 DEGREES

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10
Q

AIR COMPRESSOR SYSTEM

A

RATED AT .63CFM @ 100 PSI, AIRE RECEIVER -27 CUBIC INCHES
OPERATES WITH PRESSURE SWITCH THAT STARTS UNDER 100 PSI AND STOPS AT 125 PSI. RELIEF VALVE LIFTS AT 165 PSI

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11
Q

EMERGENCY SHUT DOWN, 5 WAYS

A

FM-200
FUEL CUTOFF VALVES (@COXN SEAT)
RED STOP BUTTONS (STBD COXN CONSOLCE)
ENGINE ROOM BUTTONS
ENGINEER CONSOLE BUTTONS

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12
Q

ROLL OVER SWITCH

A

LOCATED IN AUX SPACE ON AFT BULKHEAD PORT OF CENTERLINE ABOVE FUEL TANK
ACTIVATES WHEN BOAT ROLLS 90-100 DEGREES OR MORE
REDUCED ENGINE RPM TO IDLE (PREVENTS DAMAGE/MINIMIZED WATER ENTERING ENGINE ROOM)
BRING JOYSTICK BACK TO ZERO THRUST RO RE-QUALIFY THROTTLES

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13
Q

FUEL OIL CAPACITY

A

RBM - 510 GALS 100% / 485 GALS 95%
RBSII - 110 GALS 100% / 95 GALS AT 95%

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14
Q

HYDRAULIC FLUID CAPACITY

A

RBM - 9 GALS
RBSII - 3 QTS SEA STAR

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15
Q

LUBE OIL CAPACITY

A

RBM - 43 QTS (10.75 GAL) 15W-40
RBSII - 8 QTS 10W-30

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16
Q

GEAR LUBE OIL CAPACITY

A

RBM - 2.8 GAL 10W-40
RBSII - 1.24 QTS SAE 90

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17
Q

COOLANT CAPACITY

A

RBM - 15 GALS 50/50 PREMIX POWER COOL

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18
Q

FUEL OIL DILUTION

A

NO MORE THAN 2.5%

19
Q

FUEL TANK LOCATION

A

RBM - FRAMS 3.5-10
RBSII - FRAMES 6-9

20
Q

RBM PRIMARY/SECONDARY FUEL FILTER

A

PRIMARY - DUPLEX LONG LIFE FILTER 10 MICRON
SECONDARY - SIMPLEX FILTER (SPIN-ON) 8 MICRON

LOW FUEL OIL PRESSURE DDEC ALARM CODE - CODE 48

21
Q

FM-200

A

30LBS OF AGENT IN 40LBS BOTTLE
TWO ACTIVATION POINTS: PILOTHOUSE NITROGEN CYLINDER/ DIRECTLY FROM THE FM-200 BOTTLE
30 SECOND TIME DELAY
1 PRESSURE SWITCH ACTIVATED BU THE NITROGEN SECURES ENGINE AND ENGINE ROOM EXHAUST FANS
3 PRESSURE TRIPS ACTIVATED BY THE AGENT - ONE SECURES BOTH INTAKE DAMPENERS AND THE OTHER TWO SECURE EACH EXHAUST DAMPENERS
AGENT COMPLETELY DISCHARGES IN 10 SECONDS ALONG CENTERLINE OF ENGINE ROOM

22
Q

The RB-M propulsion system (Figure 3-1) consists of the following
systems:

A
  • MTU/Detroit Diesel Series 60 Engines with DDEC IV
  • Twin Disc MG5114SC Reduction Gears
  • Drive Shaft
  • Twin Kamewa Rolls Royce FF375S Waterjets
  • Vector Propulsion Control System
23
Q

45RBM ENGINE

A

MTU/Detroit Diesel Series 60 engines power the RB-M. The Series 60 engines are six-cylinder, four-stroke, and high-speed diesels. The engine rating is 825 HP at 2300 RPM

24
Q

Detroit Diesel Electronic Control (DDEC)

A

The DDEC monitors the engine systems and regulates
fuel injection. The system automatically performs engine protection and self-diagnostic functions to identify malfunctions in engine components and provides data to the engineer to aid in troubleshooting engine problems

25
Q

Marine Gears

A

The marine gears are Twin Disc model MG5114SC (Figure 3-10). The gears may be placed in engaged (ENGAGE), disengaged (DISENG) or backflush (BACKFL) modes. The engaged position is the normal
operating position and water will discharge from the water jet steering nozzle. The disengaged position disconnects the water jet from the engine and there is no discharge. The backflush position reverses the rotation of the pump impeller and water will discharge from the water jet intake. The backflush mode is only used when back-flushing the water jet propulsion unit.

26
Q

Reduction Ratio

A

The reduction ratio is 1.02:1 in forward and reverse.

27
Q

WATERJETS

A

Thrust is provided by two Kamewa Rolls Royce FF375S waterjets
(Figure 3-16). The jet drive allows the boat to have the minimum
possible draft. This enables operation in shallow waters and in water with floating debris that might foul or damage a typical propeller driven boat. It also provides an increased safety margin for persons in the water near the boat.

28
Q

Waterjet Bearing Housing

A

The waterjet is connected to the Cardan shaft at a gearbox located at the aft engine compartment bulkhead (Figure 3-17). The gearbox uses the same oil as is used in the diesel engines. The oil level must be maintained between the maximum and minimum markings on the gearbox dipstick. (Figure 3-18)

29
Q

Waterjet Pump

A

Water is drawn into the waterjet through an intake grate, which is
mounted flush with the hull bottom. The waterjet consists of an
impeller and a guide vane chamber, which increases the pressure of the intake flow. Water is then discharged at high velocity by the steering nozzle. The reaction to this high velocity jet stream provides thrust to propel the boat. The steering nozzle position is controlled by the tiller at the navigator’s and coxswain’s seats

30
Q

Waterjet Nozzles

A

The steering nozzle is mounted inside the steering housing on vertical pivot pins and is rotated to port or starboard by linkages attached to a steering cylinder (Figure 3-20). The hydraulic steering cylinder is connected to the port waterjet nozzle tiller. A tie rod connects the port waterjet nozzle tiller to the starboard waterjet nozzle tiller so that the steering nozzles move in tandem

31
Q

Engine Raw Water System Flow

A

Each main engine has an independent sea water suction line. Both
seawater suctions are piped from the sea chest in the lazarette, through a shut-off valve. Seawater for each engine then passes through a duplex strainer.
The seawater pumps and heat exchangers are mounted on the engines. The seawater picks up the engine heat from the freshwater circulation inside the heat exchangers. Heated seawater is discharged into the engine exhaust system, where it is used to cool the exhaust and then ejected overboard through the muffler and exhaust piping. A section of this piping is fitted with a control valve and piping to divert some of the hot water back to the sea chest for operations in slush ice.

32
Q

Intake Valves

A

The sea chest and intake valves are in the lazarette (Figure 3-22), at the base of the access ladder

33
Q

Raw Water Strainer

A

Raw water flows from the intake valve through a duplex strainer
(Figure 3-23). There is a separate intake duplex strainer for each
engine. The strainers have valves to allow the complete shutoff and clean-out of one strainer element without disruption of engine operation. The strainer element can be removed and cleaned by removing the strainer cover. The handle on top of the strainer points to the strainer that is in use. When the handle is centered, neither strainer receives water flow nor is there water flow to the engine

34
Q

RBM Fuel Tank

A

The fuel tank is located between Frame 3.5 and Bulkhead 10, along the centerline of the boat. The tank sides are approximately 17 inches off centerline at the inboard engine girders. The fuel tank is an integral component of the hull and the top forms the platform between the engines.

The fuel tank holds 510 gallons at 100% full, with 485 gallons at 95% of fuel. The fuel tank is fitted with a sending unit for displaying the fuel level at the engineer’s console.

The two suction pipes terminate one half inch from the bottom of the tank. Baffles within the tank mitigate the free surface movement of fuel. Acceptable fuel types for the RB-M engines are Diesel 1-D, 2-D (ASTM D 975-09 Compliant)

35
Q

RBM Fuel Tank Fittings

A

The fuel tank fittings are:
(01) Fuel tank level sending unit,
(02) Fuel return lines,
(03) Fuel tank level sensor,
(04) Fuel stripping line,
(05) Fuel pickup tubes and emergency shutoff valves,
(06) Access hatches in the Auxiliary Machinery Compartment and
the Engine Compartment,
(07) Fuel vent and fill hose fittings

36
Q

Steering Components

A

The steering system (Figure 3-37) consists of the following components:
(01) Hydraulic fluid reservoir,
(02) Hydraulic pumps driven by the main engine power takeoff,
(03) Hydraulic fluid filters,
(04) Hydraulic control valves which regulate the flow of hydraulic
fluid to the waterjet steering and bucket hydraulic cylinders,
(05) Hydraulic steering cylinder and tie rod,
(06) Hydraulic waterjet reversing bucket actuator cylinders,
(07) Hydraulic safety relief valve,
(08) A waterjet mounted hydraulic fluid cooler,
(09) A master control unit that translates movement of the joystick,
tiller, and clutch switches into control signals for the hydraulic
control valves,
(010)A joystick and tiller at each helm position,
(011)An engine clutch and reversing switch panel,
(012)A Vector alarm and display panel that displays the position of
the buckets and steering nozzles.

37
Q

Hydraulic System

A

The steering nozzles, reversing buckets and interceptor’s tabs are actuated by hydraulic cylinders. (Figure 3-38). The hydraulic pressure is supplied by two hydraulic pumps (Figure 3-39) located on the main diesel engines. The hydraulic pumps operate when the engines are running. Hydraulic fluid is cooled by oil coolers located on the hull plating aft of each engine underneath the shaft coupling in the engine compartment

38
Q

Vector Control System

A

The Vector thrust vectoring system integrates control of water jet steering and reversing functions and engine speed in such a way that boat fore and aft movement and rotation are achieved by moving the joystick in the desired direction and moving the tiller to steer the boat
The system controls the steering nozzle angle and the reversing bucket position of the water jet, along with RPM of the engines.

39
Q

Control System Components

A

The control system consists of the following components:
(01) Control unit,
(02) Joystick (2),
(03) Tiller (2),
(04) Trim/Roll (Interceptor) Joystick (2),
(05) Display Panels (2),
(06) Transducers (5),
(07) Portable Backup Console.
The Vector thrust vectoring system receives power from the 24P2 Engine Bus on the power distribution panel located at the engineer’s console.

40
Q

Autopilot Computer Processor

A

The Autopilot Computer Processor Unit (CPU) (Figure 3-54) is located on the aft bulkhead, port side of the auxiliary machinery compartment.
The CPU receives data from the autopilot control unit, the rudder
reference unit, the PG 500R heading sensor and the coxswain’s chart plotter and generates control signals for the vector thrust vectoring system

41
Q

Alternating Current Unit (ACU)

A

The Alternating Current Unit (ACU) conditions the power created by the generator and outputs clean 240 volts at 60Hz. The ACU also contains firmware that controls the excitation current to the generator and firmware to communicate with the remote panel. The excitation current is determined by a program that senses the load requirements of the AC power and sends it through the 3-amp fuse to the generator. The ACU communicates with the remote panel to send fault codes and receive input signals from the user via the on/off switch

42
Q

Transformer

A

The transformer’s function is to convert the output of the ACU/MultiPlus 240 VAC output to 240/120 VAC for the AC distribution bus.
The transformers (Figure 3-77) are located on the starboard side of the auxiliary machinery compartment aft and below the air compressor

43
Q

RBM Electric Bilge Pump

A

Each bilge space has a fixed, submersible bilge pump (Figure 3-107). The bilge pumps are rated at 2000 GPH (33 GPM). The bilge pumps are in the following spaces:
(01) Forepeak,
(02) Survivors’ Compartment,
(03) Auxiliary Machinery Compartment (port),
(04) Auxiliary Machinery Compartment (starboard),
(05) Engine Compartment,
(06) Lazarette

44
Q

MEPS Generator

A

The MEPS generator is mounted at the front of each diesel engine (Figure 3-75. Each generator is belt-driven through the diesel engine crank shaft and is rated at 8 kW each

coxswain pt2 (5 decks)

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