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Mechanical Theory 3 > Revsisin Cards > Flashcards

Revsisin Cards Flashcards

1
Q

What’s HPSWM mean ?

A

High pressure salt water main

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2
Q

How much bar does the HPSWS kick out to all areas and services throughout the ship ?

A

7 bar

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3
Q

What does HPSWS supply to on ship

A

Firefighting equipment/ pre wetting system/ edutors/ emergency cooling to gas turbines/ making of fresh water/ flushing heads

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4
Q

How is salt water supplied around 2 deck ?

A

By a ringmain

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5
Q

Minimum amount of pumps to be running at one time ?

A

1

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6
Q

How does each pump get rid of the debris

A

Strainers

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7
Q

How much leak off does each pump have and why ?

A

10% leak off
To prevent over pressurisation

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8
Q

When can pumps be operated from

A

Locally and remotely

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9
Q

Where’s can the firefighting equipment supplied by the HPSWM sprays be found ?

A

Magazines
Paint lockers
Inflam store
Funnels

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10
Q

What’s DC state 1

A

1- all pumps running
2- DC state 1 valves shut
3- HPSWM is divided into zones

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11
Q

What’s pre wet ?

A

It’s used to get rid of NBC contamination of upper decks

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12
Q

What’s DC state 3

A

1- 1 pump is running
2- other pumps on standby
3- all dc state valves are open

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13
Q

What temperature would white metal bearings melt at ?

A

115 degrees

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14
Q

Which machinery are cooled by the main propulsion circulation system ?

A

Gas turbine
Plumber block emergency cooling
Main forced lib system
Controllable pitch propellor

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15
Q

What machinery is cooled by the auxiliary machinery circulation system ?

A

Diesel generators
Air conditioning plant

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16
Q

Two reasons for using fresh water to directly cool machinery ?

A

•Some equipment may be susceptible to corrosion
•The system may be affected by salt water contamination

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17
Q

If the fresh water pump then the system can be x-connected to the HPSWM. Who’s permission do you need ?

A

The MEOS

18
Q

What does MARPOL mean ?

A

Maritime pollution.

19
Q

When is discharge of oil or oily mixtures aloud ?

A

• the ship is underway
• the oil in the effulent without dilution does exceed 15ppm
• the ship has in operation an oily water separating filter with a oil discharge monitoring and control system

20
Q

What’s special about discharge in Antarctic area ?

A

Any discharge into the sea of oil or oily mixture from any ship is prohibited

21
Q

Special areas defined by the international maritime organisation (IMO)

A

Caribbean
Celtic sea
Mediterranean Sea
Celtic sea
English channel
Irish Sea
North sea
Baltic Sea

22
Q

Most common sources of oily water contamination

A

Bilges
Fuel systems
Oily systems
CPP systems

23
Q

Point to make sure the least amount of oil enters the bilge

A

Keep machinery spotless
Monitor and investigate heavy uses
No surfactants to be used
Afff used only real risk situations
Eductors to be manned in operation
Maximise use of shoreside facilities

24
Q

Define black water sewage

A

It is defined as drainage from Wcs, urinals, medical compartments and any water mixed with this waste

25
Q

Black water can be discharged at certain points what are they ?

A

Within 4NM of the coast= sewage treatment plant has to be operation
Between 4 & 12NM of the coat = an emo approved system to disinfect
Over 12NM from the coast = no treatment

26
Q

Order of Opening the valves On
A eductor ?

A

1- open discharge overboard
2- open motive force
3- open bilge suction

27
Q

2 types of sewage treatment plant ?

A

Biological and collect/hold/transfer

28
Q

IMS meaning

A

Inside machinery space

29
Q

OMS

A

Outside machinery space

30
Q

If aerobic digestion fails what is given off

A

Hydrogen sulphide

31
Q

Where does contamination come from working with sewage

A

Dangerous chemicals
Raw sewage
Dangerous gases

32
Q

How long can you store shit in holding tanks/ collecting tanks

A

Holding tanks - 12 days
Collecting tanks - 24 hours

33
Q

IMO means

A

International maritime organisation

34
Q

How much bar for 1-4 stages

A

1st stage= 4 bar
2nd stage= 16
3rd stage= 64
4th stage= 276

35
Q

What do you need to do when working with hoses ?

A

-Must connect at each end
-Any hose unconnected must have safety line attached
-Screw connections must be free from oil and gases
- flexible horse must not be used for washing down

36
Q

What does hspwm do ?

A

Supplies all areas and services on ship with 7 bar

37
Q

What is LP air used for ?

A

-pneumatic tools
- radar wave guides
- emergency stern seal inflation
-pneumatic surveillance panels

38
Q

What is supplied with hp air

A

•DG
•GT
•Ships siren
•BA
•Weapon systems
•Hydraulic system accumulator charging
•air driven machinery operation
•reducing valve

39
Q

What is VPS

A

Made up of hoses manifolds and pumps

40
Q

What machinery is cooled down by main propulsion circulation system

A

GT
Plumber block
Making forced lub oil system
CPP

Mechanical Theory 3 (1 decks)

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