Category: MOTOR

MOTOR M E O CLASS - IVQ1. If exhaust temperature of one unit is high. What could be the reason? Reasons: · Leaky injector· Leaky exhaust valve· Scavenge fire· Incorrect fuel injection timing· Incorrect fuel pump setting· Scavenge ports choked· Temperature indicator faultyQ2. What are the Tests you will carry out on Lube Oil. Answer: Water contentAlkalinity ViscosityDrop testQ3. Explain Horse power and kilowatt. 1 horse power = 746 watt = 0.746 kwQ4. What are the safeties you will find on steering gear system? Steering safeties Relief shock valvesBuffer relief valvesBy pass valvesIsolating valvesReplenishing pumpStandby pumpMotor overload alarmHydraulic oil low pressure alarm Tank low level alarmControl system failure alarm Steering failure alarm Power failure alarm.Q5. How you will put the gauge in cylinder liner. Template in Forward-Aft and port starboard direction. Various points from top to bottom.Q6. What is power? Rate of doing the work is known as power. Q7. What could be the reason if spark coming from funnel. Reasons: Exhaust valve leaking, After burning Late injection Exhaust Gas Boiler fire Fuel pump timing incorrect Q8. What are the cause of Heavy Oil and Lube Oil purifier overflow? Cause: Throughput highSludge depositsSealing water low Improper gravity discQ9. What are the symptoms of piston running hot? Piston cooling oil outlet temp high Q10. if an air inlet is leaking, how do we know? Relief valve/ bursting disc will lift Starting airline will be hotQ11. What are the reasons exhaust valve is leaking in any cylinder? High exhaust temperatureLoss of compression pressureSpark from funnelQ12. What will you do if jacket temperature of Auxiliary engine increases.Change over jacket water cooler or put both coolers in service.Q13. What are the types of Scavenging’? Loop scavenging Cross scavengingUni-flow scavengingQ14. What is after burning and what are the symptoms? Exhaust temp high Uneconomic running,Reduction in thermal efficiencyLoss of power, Fouling from carbon depositsOverheating in exhaust systemQ15. What is diesel knock ?Combustion noise due to ignition delayQ16. How diesel knock affect engine performance?Occurs during starting from cold. Rapid increase in pressure and temperature, after burning, uneconomic runningQ17. What is the first symptom of Scavenge fire? Scavenge air temperature will Increase Exhaust temperature will get increasedSurging will startSmoke from Turbo Charger air inlet, Smoke and noise Q18. What are the symptoms of piston crack and liner crack? Rapid rise in sump level piston cooling temperature highQ19. If piston cooling and jacket cooling temperatures start going high. What will you check?The following checks should be carried outPreheat setting,Jacket Cooling Water temperature controllerPurge oil from controllerLT cooling temp high Q20. What could be the reasons for Piston seize? Cylinder lubrication inadequate

Category: MOTOR

MOTOR M E O CLASS – IV

MARINE ENGINEERING (MOTOR)