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Theory 3 Auxiliary > Auxiliary systems > Flashcards

Auxiliary systems Flashcards

1
Q

High pressure salt water main (HPSWM) maintains what pressure?

A

7 Bar

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2
Q

Uses for HPSWS (high pressure salt water system)

A
  • Firefighting hydrants
  • Pre wetting
  • Fitted bilge and salvage eductors
  • Emergency cooling to main propulsion
  • Auxiliary machinery
  • Making fresh water
  • Flushing heads
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3
Q

Describe the S/W ringmain

A
  • Runs around 2 deck
  • Fitted with isolation valves that allow maintenece to proceed or for damaged sections to be isolated
  • Supplies salt water to the services that need it.
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4
Q

What operations would require more than one Salt water pump to be running?

A

Flying operations

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5
Q

Describe Salt water pumps

A
  • Takes from the sea & discharges into ringmain via Risers
  • Has a 10% leak offf valve to prevent over pressurisation
  • Can be operated from local & remote
  • Electrically driven
  • Minimum of 1 pump running, the other is on standby
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6
Q

Sprays are fixed fire fighting equipment supplied by the HPSWM, where can they be found?

A
  • Magazines
  • Paint lockers
  • Inflam store
  • Funnels
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7
Q

What is pre wet used for?

A

To wash the upper decks to clear them of Nuclear, Biological & Chemical (NBC) contamination.

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8
Q

Describe DC State 1

A

Is when there is a possibility of sustaining damage.
1.All pumps are running
2.Valves are shut
3.HPSWM is divided into zones

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9
Q

Describe DC State 3

A

During normal operations
1. One pump is running
2. Other pumps are on standby
3. All valves are open

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10
Q

At what temp do White metal bearings melt?

A

115 C

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11
Q

What systems are cooled by the Main propulsion circulation system?

A
  • Gas turbines
  • Plumber blocks
  • Main forced lub system
  • CPP (controlable pitch propeller)
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12
Q

What Machinery is cooled by the Auxiliary machinery circulation system?

A
  1. Diesel generators
  2. Air conditioning plants (ACP)
  3. Each piece of the Auxiliary machinery has its own S/W pump & has X Conn to allow maintence to strainers
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13
Q

What are the 2 reasons for using fresh water to cool machinery?

Fresh water/ Salt water Circulating System

A
  1. To stop corrosion
  2. Stop system from contamination
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14
Q

What is MARPOL 73/78

Enviromental compliance

A

Maritime Pollution

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15
Q

Inside special areas, where is discharge of oil allowed?

Enviromental compliance

A
  • The ship is underway
  • Oil content without dilution doent exceed 15ppm
  • The ship has an Oily water seperating filter, with an oil discharge monitoring and control
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16
Q

Outside special areas when can you discharge oil & oily mixtures?

Enviromental compliance

A
  • ship is proceeding en route
  • Oil content without dilution doesnt exceed 15ppm
  • Oily mixture is processed through oil filtering equipment
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17
Q

What is the IMO?

Enviromental compliance

A

International Maritime Organisation

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18
Q

Name 6 Special areas

Enviromental compliance

A
  1. Baltic sea
  2. North sea
  3. Irish sea
  4. Celtic sea
  5. English channel
  6. Black sea
19
Q

What are the most common sources of oily water contamination?

Enviromental compliance

A
  1. Bilges
  2. Fuel systems
  3. Oil systems
  4. Cpp systems
20
Q

Ships husbandry UNMAKE

To ensure the least amount of oil enters the bilge you have to…

Enviromental compliance

A
  • Keep machinery spotless
  • Monitor lub oil ready use tank
  • No surficants used
  • AFFF used only in real risk situations
  • Eductors to be manned when in use
  • Use shoreside facilities when alongside
21
Q

Who must you tell about a spill?

Enviromental compliance

A
  • OOD when in harbour
  • OOW when at sea
22
Q

Nautical miles

Name the regulations for discharge of black water at sea

Enviromental compliance

A
  • Within 4NM - an IMO approved STP is in operation
  • Between 4&12 NM an IMO approved system to dilute & disinfect the sewage.
  • Over 12NM - No treatment needed
23
Q

Grey water is defined as?

Enviromental compliance

A
  • Bathrooms
  • Sinks
  • Galleys
24
Q

What is the Vacuum pumping system (VPS) comprised of?

Enviromental compliance

A
  1. Electrically driven pumps
  2. Manifolds
  3. Hoses
25
Q

What is an Eductor & What does it do?

Bilge & Sullage

A
  • Removes large amounts of fluid from the bilges quickly
  • As fluid passes through a pipe that narrows, or widens the velocity & pressure vary
  • HPSW provides motive force
26
Q

What does the bilge system do?

Bilge & Sullage

A

Removes oily water from machinery space bilges & discharge oil to oily water seperator.

27
Q

What is the sullage system?

Bilge & Sullage

A

Retains dirty or waste oil/fuel until it can discharged ashore

28
Q

What is the danger on incorrect use of an eductor?

Bilge & Sullage

A

If the D.O.B valve is not opened first seawater will back fill the bilge.

29
Q

Oily water seperator takes suction from?

Bilge & Sullage

A

The bilge or holding tank

30
Q

Advantages of using a sewage treatment plant are?

Bilge & Sullage

A
  • Reduce number of ship side openings
  • Simplify pipe runs
  • Heads & bathrooms can be lower in ship & used in dry dock
  • Can operate in anti-pollution zones
  • easier to close down in cbrn consitions
31
Q

2 basic sewage plants

Bilge & Sullage

A
  1. Biological
  2. Collect hold & transfer
32
Q

Name the 2 processes for breaking down sewage

Bilge & Sullage

A
  • Aerobic (air) & Anaerobic Digestion
  • Sewage is broken down by micro organisms
  • If aerobic digestion fails if there is no air supply
33
Q

Hazards concerned with operating a STP?

Bilge & Sullage

A
  1. Dangerous chemicals- Calcium hypochlorite
  2. Raw sewage- Typhoid, Hepatitis, Gastro-enteritis
  3. Dangerous gases- Hydrogen sulphide, Methane, Chlorine
34
Q

Effects of hydrogen sulphide?

Bilge & Sullage

A

Toxic gas that smells of rotten eggs.
150-400ppm= Loss of smell, dizziness, coughing, difficulty breathing
1000ppm= Death

35
Q

Precautions for Sewage treatment plants (STP)

Bilge & Sullage

A
  • Medical protection
  • Hygiene
  • PPE
  • Monitor atmosphere
36
Q

Advntages of HP air

HP Air System

A
  • Easily distributed
  • Can be easily stored
  • Flexibility of use
  • Low risk of fire

*

37
Q

HP pressure air can be divided into..

HP Air System

A

IMS- Inside machinery space
OMS- Outside machinery space

38
Q

What bar is Low pressure air?

HP Air System

A

8 Bar

39
Q

Name 6 services supplied with HP air

A
  1. Diesel generator starting
  2. Gas turbine starting
  3. Ship siren
  4. Weapons
  5. Breathing apparatus
  6. Air drive machinery operation
39
Q

Name 6 services supplied with HP air

A
  1. Diesel generator starting
  2. Gas turbine starting
  3. Ship siren
  4. Weapons
  5. Breathing apparatus
  6. Air drive machinery operation
40
Q

What is a ringmain?

HP Air System

A

A continuous loop of piping to which air is supplies ,by the compressor, and from which individual services are connected.

41
Q

What are the 4 stages of the High pressure air compressor (HPAC)

HP Air System

A
  1. Stage 1- 4 bar
  2. Stage 2-16 bar
  3. Stage 3- 64 bar
  4. 276 bar
42
Q

Services supplied with LP Air?

HP Air System

A
  • Pneumatic tools
  • Radar waveguide
  • Emergency stern seal inflation
  • Pneumatic surveillance panels

Theory 3 Auxiliary (1 decks)

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