How does emergency alarm ring?
Ans: Continuous ringing of bell. Emergency situation is explained at the muster situation. Pattern of Emergency signal is indicated on Muster list
Q. Explain the Fire Tube and Water Tube Boiler.
Fire Tube Type: Due to simple design of the tubes effective heat transfer takes place, but periodical cleaning/maintenance is slightly difficult. Soot blowing is not effective for regular cleaning. Used with low pressure boiler
Water Tube type: In comparison to fire tube type heat transfer is not so so effective. Gas side cleaning is easier, sometimes fixed water spray design is used for cleaning. Soot blowing is effective , used with medium – high pressure boiler
Q. What is Ogee ring?
Ans: Connects the bottom of the furnace to the boiler shell plating.
What is I.S.M. ?
The International Management Code for the Safe Operation of Ships and for Pollution Prevention (International Safety Management (ISM) Code).
What is I.M.O. Convention ?
Conventions are chief instruments of IMO, being binding legal instruments, regulating some aspect of maritime affairs of major concern to IMO e.g. safety of life at sea (SOLAS) or marine pollution (MARPOL).
They are identified by name and the year of adoption by the Assembly, Such as the International Convention on the Safety of Life at Sea, 1974.
May have detailed technical provisions attached in annexes, such as six annexes to the MARPOL convention, each dealing with a different aspect of marine pollution.
How many conventions are there ?
About 50 ? Though checked up to 1998, 25.
What is a Protocol ?
A treaty instrument which makes major modification to a Convention which has been adopted but not yet in force. The Protocol usually speeds up the Convention’s entry into force. e.g. MARPOL 73/78, SOLAS 74/78
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Boilers are inspected to maintain the regulatory requirement. Regular internal and external examination during such survey constitutes the preventive maintenance schedule the boiler goes through to have a safe working condition.
IMO ship pollution rules are contained in the “International Convention on the Prevention of Pollution from Ships”, known as MARPOL 73/78. On 27 September 1997, the MARPOL Convention has been amended by the “1997 Protocol”;, which includes Annex VI titled “Regulations for the Prevention of Air Pollution from Ships”. MARPOL Annex VI sets limits on NOx and SOx emissions from ship exhausts, and prohibits deliberate emissions of ozone depleting substances.
The IMO emission standards are commonly referred to as Tier I…III standards. The Tier I standards were defined in the 1997 version of Annex VI, while the Tier II/III standards were introduced by Annex VI amendments adopted in 2008, as follows: