Basic hull and slip hull Flashcards
Any changes to a commercial vessel structure and under water hull that affects its watertight integrity or stability requires a record of work, and approval from whom ?
The surveyor
Aluminium will corrode quickly when in contact with copper based anti fouling paints.
A. True
B. False
A. True
Name 2 ways of classifying corrosion ?
Galvanic
Electrolysis
Name 6 equipment items that are checked during your out of water survey for a commercial vessel ?
Through hull fittings
Anodes
Seacocks
Hull integrity
Shaft alignment
Shaft bearings
What is the correct name of a slipping facility that operates on railways ?
Patent slip
Prior to dry docking what should the dock master be informed about , other than the plans and dimensions of the vessel ?
Ballast
Stability details
List
Trim
Loads
What is used to provide cathodic protections against corrosion ?
Sacrificial anodes
What will a copper fishing swivel left in the bilge of a aluminium hull result in ?
Corroding through the hull
When slipping name what conditions of stability should be taken into account ?
Fuel Full
Free surface
High centre of gravity
Prior to undocking ensure that the main engine seacocks are ?
Open or closed ?
Open
List 3 safety precautions to be observed in a dry dock ?
Safety inspection
Provide a safe gangway
No unauthorised entry
Entering a confined space without a permit is breaching what ?
Health and safety act
WHS legislation
List 3 issues that may need to be addressed prior to entering a confined space ?
Ventilation
Oxygen content
Gases
Lighting
You are required to inspect a fuel tank after slipping and prior to survey to check for structural deterioration or pollutant?
What must you be aware of ?
Fumes
Tank levels
Follow regulations
List 3 items you would look for when checking a vessels prop ?
Thin blade edges ?
Pitting in the blade ?
Warping or denting of the blade
List 2 ways to identify the deterioration of a steel vessel ?
Pitting of the steel
Paint blisters
Rust bleed marks
Which procedure pertaining to saltwater lubricated stern tube stuffing boxes is usually observed when the ship is expected to be in port for an extended period ?
Stuffing box is tightened
Explain how force is efficiently provided to vary the pitch of the blades on a modern controllable pitch prop ?
The force to move the props is transmitted through the hydraulics via the hydraulic pump.
In a water cooled stern tube why is a slight leakage of water across the packing gland required ?
To lubricate and cool the shaft
Name 3 types of slipping ?
Crane
Sling
Dry dock
Slipping
How do you test and WTD water tight door ?
Chalk test
What hazards could there be when conducting basic cleaning and maintenance ?
Chemical hazard
Fumes
Burns
What procedures would you do before slipping ?
Organise surveyor parts etc.
What inspections would be carried out when the vessel is on the slip way ?
Under water areas
Including
Props
Hull
Anodes
Rudder
What would you do before putting the vessel back in the water ?
Ensure vessel is sea worthy
Name the pollution control equipment used at a marina slipway ?
Catch drains to collect contaminated water run off.
Spill kits
What PPCE could be required on the slip way ?
High vis vest
Hard hat
Steel caps
Should anodes be painted before vessels enter the water ?
Yes or No
No
Name some tools and equipment used in hull maintenance ?
Ladder
Paint roller
Sander
Tapping hammer
