MEO CLASS4 ORAL 25/03/2021
MEO CLASS4 25/03/2021 QUESTIONS AND ANSWERS Crank case explosion Main engine one unit exhaust temperature is increased ,what PARAMETERS will you Check,what will be ur action, what can be the reason? BOILER MOUNTINGS AIR IN THE REFER COMPRESSOR,HOW WILL YOU FIND AND WHAT WILL BE THE ACTION. MAIN BEARING AND BOTTOM END BEARING CLEARANCE CRANK CASE EXPLOSION HOW IT WILL HAPPEN? TO MUCH CLEARANCE BETWEEN BEARINGS, OIL FLIMS MAY BREAKDOWN DIAPHRAGM IS NOT SEALING PROPELY PISTON CROWN IS BROKEN, EXHAUST GAS MAY LEAK TO CRANK CASE, CIRCULATING LUBRICATION OIL NOT PROPER. ENGINE CHAIN DRIVE IS TOO TIGHT. WHICH MAY LEADS TO HOT SPOT. GEARS DONT HAVE PROPER LUBRICATION. PRIMARY EXPLOSION? DUE TO ANY ABOVE REASON HOT SPOT WILL CREATE. WHEN LUBRICATION OIL CONTACT WITH HOTSPOT OIL BECOMES VAPOUR, AGAIN VAPOUR WILL COME AND CONTACT WITH THE HOTSPOT, PRIMARY EXPLOSION WILL HAPPENED. SECONDARY EXPLOSION? AFTER THE PRIMARY EXPLOSION, PRESSURE WILL INCREASED INSIDE THE CRANKCASE. NOW CRANKCASE RE