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88L10 > [Bilge/Ballast Systems] > Flashcards

[Bilge/Ballast Systems] Flashcards

1
Q

What are the two functions of the bilge/ballast pump?

A

1) Bilge drainage

2) Vessel stability

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2
Q

What are the major components of the bilge/ballast pump subsystem?

A

1) Centrifugal pump
2) Alternating current motor
3) Motor adapter

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3
Q

What maintains HFW pressure required for the gaylord hood system?

A

Booster pump

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4
Q

What provides water to the bilge/ballast system from the sea chest and transfers it through the piping to the seven ballast tanks as controlled by valve alignment?

A

Bilge/ballast pump

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6
Q

List the characteristics of the oil-water separator (OWS)

A

1) Single-stage coalescer chambers with cleanable plates
2) Oil content monitor to monitor purity of discharge water prior to overboard discharge
3) Water polisher for use when OWS fails to meet federal regulations

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7
Q

Where are the ballast tanks? How many are there?

A

3 forward
2 midships
2 aft

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9
Q

List bilge/ballast pump capabilities and features

A

1) Can operate from one of two pump assemblies
2) Controlled from the pump or engineering control center
3) Transfers water to seven ballast tanks to provide vessel stability
4) Provides for bilge drainage

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10
Q

What sense the pressure of the OWS system and shut down the system when the pressure is either too high or too low?

A

Pressure switches

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11
Q

What provide an increase in HFW temperature for use in the galley?

A

Two booster heaters

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12
Q

List the capabilities and features of the oil-water separator (OWS)

A

1) Processes 10 gallons per minute of oily waste water

2) Two-position switch to monitor 15 PPM or 70 PPM limits ARMY USES 15 PPM

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13
Q

What displays the current oil content of the processed water, provides a means to change PPM alarm settings from 15 to 70, and an audio/visual alarm when the PPM set point is exceeded?

A

Remote Alarm Assembly

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14
Q

What valves are controlled by the OWS control panel to open and close depending on the signals from the oil/air and oil/water sensors?
The valves close on shutdown

A

Motorized valves

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15
Q

What consists of four OWS system gauges and one OCM system gauge for purge water pressure, OCM inlet pressure, OWS outlet pressure, strainer inlet and outlet pressures?

A

Gauge panel

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17
Q

Where is the oil-water separator (OWS) located?

A

Aft of the EOS, near centerline, under the engine room ladder

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18
Q

How is the bilge/ballast pump pressurized?

A

By a close coupled electric pump

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19
Q

What and where is the water polisher?

A

Consists of a housing with 9 filters stacked 3 high and 3 wide and located between the separator tank and the OWS pump

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20
Q

What removes non-liquid objects from the oily waste water from sludge tank?

A

Duplex strainer

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21
Q

What holds seawater and is in the vessel’s hull bottom?

A

Sea chest

22
Q

What is set to shutdown the OWS if either the pressure (15 PSI) or vacuum (16 in. Hg) in the separator tank is reached?

A

Compound gauge

23
Q

Multi-use pump used for oil-water separation to pump oily waste water from bilges and other areas to the sludge tank; to pump bulk oil from machinery to the dirty oil tank; and to pump from the dirty oil tank to shore discharge facilities

A

Dirty oil pump

24
Q

What serves as an auxiliary bilge/ballast pump?

A

One of two fire pumps

25
Q

Where the physical separation occurs when the oil from the water is attracted to the coalescing plates and floats to the top of the tank and into the oil tower

A

Separator tank

26
Q

List bilge/ballast pump characteristics

A

1) Motor driven, electric - 40hp

2) Pump, centrifugal - 750 gpm at 150 PSI

27
Q

What consists of three electrodes and shuts down the system if the separator floods with oil or air?

A

Oil/air sensor

28
Q

What is located in the water discharge piping from the OWS pump to give the operator an indication of system flow and quality?

A

Sight glass

29
Q

What means a mixture with any oil content, including bilge slops, oil residues (sludge), oily ballast water, and washings from cargo oil tanks?

A

“Oily waste” or “oily mixture”

30
Q

What means an iridescent appearance on the surface of water?

A

Sheen

31
Q

What is a device that is designed to prevent the overboard discharge of treated or untreated sewage, or any waste derived from sewage?

A

Type III Marine Sanitation Device

32
Q

What is the condition resulting from the presence of chemical, mineral, radioactive, or biological substances that alter the natural environment or adversely affect human health or the quality of life, biosystems, the environment, structures and equipment, recreational opportunities, aesthetics, and/or natural beauty?

A

Pollution

33
Q

Where is the bilge/ballast pump located on the LCU-2000?

A

Main engine room

34
Q

What controls the directional output of effluent from the OWS by measuring the oil concentration in the processed water?

A

Oil content monitor (OCM)

35
Q

What contains 3 rows of filters stacked 3 high which further aids in removal of oil from the processed water to attain parts per million setting or less?

A

Water polisher

36
Q

What heats the CFW supply and maintains its setpoint temperature?

A

Hot water heater

37
Q

What are the two modes on the OWS control panel?

A

1) HAND - used to operate for troubleshooting purposes and for maintenance functions
2) AUTO - normal mode used for processing oily waste water from the sludge tank

38
Q

What draws suction from the separator tank, and moves the water to overboard discharge or back to the sludge tank?

A

OWS pump

39
Q

What connects the SDA, remote alarm assembly, audible alarm, and OWS system at the control panel

A

Remote display

40
Q

How often must the SDA, printed circuit board, and elapsed timer be replaced as a set?

A

Every 2 years or 2,000 hours, whichever occurs first

41
Q

Where are the pipe-mounted strainers for the bilge/ballast pump located?

A

Lowest accessible point in the bilges of the engine room, auxiliary machinery room, bow thruster machinery room, and tunnel

42
Q

What valve reduces pressure to the OWS system?

A

Pressure-reducing valve

43
Q

What samples the processed discharge from the water polisher or OWS (if water polisher is bypassed) and controls the operation of the OWS system?

A

OCM Sensor detection assembly (SDA)

44
Q

What means human body wastes and the wastes from toilets and other receptacles intended to receive or retain body wastes?

A

Sewage

44
Q

What sends a tank level signal to the gauge board in the engine room which indicates each FW tank level?

A

Tank Level Indicator (TLI)

44
Q

What and where is the separator tank?

A

Houses the coalescer plates and is located in the engine room starboard side aft of the EOS

88L10 (22 decks)

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