MARINE ENGINEERING :MEO Exams

It will get activated only when two detectors are activated Once it is activated it will send a signal to a fire alarm panel from fire alarm panel sense the zone of fire and it will signal to the hyper mist control panel H.M control panel sends a signal to high-pressure pump (Plunger type reciprocating pump) starter and also solenoid operating valve according to the zone of fire Capacity of pump: 200 litres/min @ 70 bar pressure discharge At nozzle 12-20 litre/min @ 50 bar pressure discharge it is a very high water mist system which creates a water fog which effectively puts out the fire whole also providing a cooling effect the speciality of H.M Nozzle: its diffuser action in nozzle drop in pressure at nozzle throat will breaking the liquid particle into a fine mist

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...