2023年轮机长和大管轮面试题目.doc

Interview conducted for C/E&2/E candidate1: What is the plant to ready for manoeuving and departure port?*start the second generator and after all checks, take it on load*The third generator should be kept on standby condition*Essential steps to be noted: Turning engine indicator cocks parameters abnormal noise*Check system FO service and settling tanks diesel oil service tank air system LO system T/C CW system checking the fuel regulating gear & starting system* slow turning the engine*this must be carried out to prevent damage caused by fluid in one of the cylinders and to check the reversing mechanism*Before beginning the slow turning obtain permission from the bridge2 what items to be analysis on lube oil?*Specific gravity viscosity flash point TAN(total acid number)SAN(strong acid number) alkalinity TBN( total base number) water content Conradson carbon ash insoluble3 what cause of exhaust temperature rises in all cylinders?* Increased scavenge air temperature owing to inadequate air cooler function*Fouled air and gas passages*Inadequate fuel oil cleaning or alerted combustion characteristics of fuel*wrong position of camshaft4 what causes of high turbocharger speed?*Fouled air filter(early stage of unloading the compressor)*Fire (early stage) in the exhaust check immediately.5 what causes of cylinder knocking?*Fuel timing too far advanced*fuel injector valve needle sticking at open position*Excessive carbon built up on the crown*Broken exhaust valve*Mechanical damage in the3 cylinder6 what action to be taken of crankcase mist detector alarm (never cut out mist detector potentially dangerous)?*Inform bridge and C/E*Stay away from crankcases*slowdown and stop*start turning gear immediately for at least 30 minutes to cool down*Through investigation of mist detector crankcase abnormality and moving parts required7 what caused of scavenge fire and action taken?*Inform bridge and C/E*Do not stand near the relief valves*slow down engine ensure that the auxiliary blowers are off*In case the fire persists stop the engine gradually to prevent risk of piston seizure*Fire should be go off when all deposits burnt out*keep turning the engine with cooling on to prevent seizure of moving parts8 what action taken when crankcase explosion? (Most of the cases engine will suddenly stop upon explosion)*Inform bridge and chief engineer*evacuate the E/R*Every safe effort to be made to turn engine by turning gear or slow turning for 30 minutes to prevent seizure of moving parts*Thorough investigation required into the cause of the explosion before re starting 9 What will you do when boiler water level was low during normal steaming condition?*Fist start the standby feed water pump *Second check and wash the local water level gauge*Third check any leakage on steam pipes or safety valves 10 Turbo charger surging causes and preventive measures?* T/C surging can be divided into three main categories* malfunction in the fuel system*Rapid variations in the engine load* Fuel system fuel injection system fuel line components fuel timing *exhaust system valve exhaust passage through turbocharger and gas boiler*scavenge air system*Miscellaneous rapid changes in load and RPM governor*Immediate action temporarily counteracted by blowing offReduce engine load by taking the T/C away from the surging line*Preventive measures regular maintenance of items mentioned above prevent load fluctuations during ballast voyage and bad weather*Periodical check of M/E bedplate a strength member* Cross girder under the bearing housing*Bolt holes* Holding down bolts of slackening *Chocks (fretting cracks and slackness) 11 Turbo blower maintenance during operation and check to be made during maintenance Important points for turbo charger maintenancel Gas casing scaling and corrosionl Water treatment is essentiall Rotor unbalance due to improper cleaning of the air side as well as turbine side wheelsl Air side impeller usually have a film of oil on the aluminum surface l Gas side in service cleaning necessary to prevent deposits from combustion productsl Improper cleaning of air side or turbine side could result in rotor unbalance and subsequent operational problemsl Bearings and gear pumps should be repaired at intervals specified by maker12 Daily routine checks required on steering gear system.* Oil quantity in the oil tank within range of level gauge*Oil temperature*Pressures of hydraulic cylinders comparing with normal data* Abnormal noises and vibration from moving parts and motor couplings* Oil leakages from tank cylinder valves ram packing and pipe joints* Abnormal overheating of cylinder stuffing box and glands motor ampler13 Immediate action/causes of abnormal related to steering gear system.* Rudder does not respond* Trouble of auto pilot control* Control the steering gear by th。