MARINE ENGINEERING :MEO Exams

1.Constructed to prevent spilling of electrolyte & emission of spray 2. Assembled in trays supported on non-absorbent insulating materials. Insulated stand for voltage above 120 V 3.The deck below battery room to be protected with acid resisting alkaline resisting materials ( floor        up to 150 mm on all sides ) 4. Notice of "PROHIBITED NAKED LIGHTS & SMOKING " must be displayed 5. Battery bank > 2 kW - in battery room or locker on deck                             .2-2kw - in battery room, a locker on a deck or in m/c spaces or in open with a cover                          < 0.2 kW - in open with protective cover 6.batteries not to be installed in accommodation & sleeping quartered 7.Natural or forced air circulation required to prevent accumulation of flammable gases. 8.L...

  It is given that engine room bilge pump has suction manifold on which 3 valves are located. One valve for the 3 engine room bilge wells suction, another one for Bilge tank suction and the third one is for sea water suction. It is found that the Bilge pump is unable to take suction from any of the bilge wells, but is able to take suction efficiently from Bilge tank. What is the most probable cause? Bilge well suction pipeline leaking between individual bilge well valves and suction manifold valve Which of the following valves cannot prevent backflow of liquid in a pipeline? Gate valve Purifier is not rotating with desired rpm, reason? Friction pads worn out The most important control measure to prevent boiler tube failure is Proper maintenance of boiler water condition Refer cooling tubes act as self-cooling & expansion by Spring tube F.O. transfer pump was working efficiently, but it stopped taking suction suddenly. There is a sound...

  Writing the Oil Record Book, Part 1 (Machinery Space Operations) Oil record book is required for all tankers above 150 grt and  all other ships above 400grt. Operations required to be mentioned 1.Ballasting or cleaning of oil tanks 2.Collection and disposal of oil residues 3.Discharge overboard or disposal of bilge water from Engine room 4. Bunkering of fuels or bulk lubricating oil(in any tanks) Apart from the above, any accidental discharges of oil or oily mixtures must be entered with circumstances or reasons for discharge. Any failures of oil discharge equipment must also be made ORB should be kept in an accessible location and to be preserved for three years from the last entry made LIST OF ITEMS TO BE RECORDED WITH CODES (A) Ballasting or cleaning of fuel tanks   1. Identity of the tank   2.Whether cleaned the tank before, if not type of oil previously contained   3. For Cleaning process     3.1  Position and time of ...

The purpose of boiler water treatment is fourfold: 1.To react with any remaining feed water hardness and prevent its precipitation as scale on boiler metal; 2.To condition any suspended matter such as hardness sludge or iron oxide in the boiler and make it non adherent to boiler metal; 3.To provide anti-foam protection to permit a reasonable concentrations of dissolved solids in boiler water without introducing carry-over; 4.To eliminate dissolved gases from water and to provide sufficient alkalinity to prevent boiler corrosion.          i.   Scale Formation and Prevention Typical constituents of scales and deposits in boiler are: Calcium carbonate, Calcium sulphate, Complex silicates of Mg, Fe, Ca and Al, Calcium phosphate, Magnesium hydroxide, Magnesium phosphate, Iron and copper oxides. A build-up of scale leads to reduced boiler efficiency and in water tube boilers can eventually lead to tube failures as o...