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1. Thermometer is faulty . 2. Less fuel supply due to faulty injector, pump , pipes,timings or shifting of fuel cam . 3.Faulty exhaust valve operation due to which it may shut.

1. Thermometer is faulty . 2. Fuel injector tip broken or nozzle in a poor condition. 3. Incorrect fuel timings or fuel can shift . 4. Exhaust valve leaking . 5. Blow past of piston rings . 6. Less air supply due to the individual unit scavenge ports fouled or scavenge fire .

1. How compressor compress the air onboard ship ? 2. What is vapour compression cycle ? 3. What is the use of capacitor in the electrical circuit ? 4. What is young modulus , Bulk modulus of rigidity? 5. What is Zeroth law of thermodynamics? 6. What is the working principle of fresh water generator? 7. What is the  first and second law of thermodynamics ? 8. Questions from your cv's ? 9. What is Boyle's Law , Charle's Law , Pascal's Law ? 10. What is ic engine ? 11. Why turbocharger used ? 12. What are the properties of cast iron ? 13.  Which engine is used for main propulsion and why ? 14. Gravity Disc in purifier ? 15. What is Surface tension ? 16. Difference between 2s and 4s engine? Will add more questions

1. Blow past due to worn or damaged piston ring . 2. Stuffing box leaks . 3. Excessive cylinder lubrication. 4. Inadequate scavenge space draining . 5. Poor combustion, injector condition, fuel timing or worn liners . Source : Deven Aranha

1. Rolling , pitching and yawing etc. movement of the ship . 2. Leakage  from jacket cooling water or from piston cooling water . 3. Storage tank valve kept opened . 4. Wrong operation of  the purifier . 5. Transfer pump wrongly lined up . Source : Deven Aranha

1. Improper cooler setting is wrongly adjusted . 2. Valve is shut or improper venting . 3. Overloaded engine or piston is getting hot . 4. Crack in the liner , cylinder head or exhaust valve . 5. Temperature controller malfunctioning.

1. Low supply pressure to the lube oil or low sump level in the tank . 2. Air lock in the lube oil or lubricating grooves obstructed. 3. Higher bearing clearances , excessive wear or improper tightening . 4. Pipelines defects or valve is shutdown . 5. Lube oil contains water or metal impurities.

1. Check for the foreign particles and color of the lube oil . 2. Check the walls of the crankcase for carbon deposits and leaking from diaphragm . 3. Check the bearing clearances and worn out white metal near it. 4. Check the web alignment marks and crankpin . 5. Crankcase relief door . 6. Any discolorisation signifying hotspot .

1. Insufficient air in the air bottle. check the pressure gauge . 2. Sticking air starting valve . 3. Turning gear interlock switch faulty . 4. Air distributor is faulty . 5. Exhaust valve is opened due to less air spring spring pressure. 6. Worn piston ring which leaks the air . 7. Automatic starting valve is faulty . 8. Bursting disc diaphragm is leaky . 9. Leakage in the pipeline due to corrosion . 10. Rack position is in manual mode . Change it through governor to automatic mode . 11. Booster pump is not building up pressure to the fuel pump. 

During Round 1. Check the funnel smoke and judge it as given below   a. If it is whitish means air is more than required and more water content in the fuel . b. If it is blackish means combustion is not proper,  more fuel is present than required . c. If it is transparent greyish means combustion is taking place properly .        Note. One should must identify the funnel of boiler , auxiliary engine and main engine . 2. Check the economiser platform for feed water , steam and smoke . 3. Check steering platform for hydraulic oil level . 4. Check the boiler  for water level if blow through is required for correct water level it should be done . 5. Check the boiler for flame through the sight glass . 6. Check the positions of portable fire extinguishers. 7. Check the level of crankcase lube oil sump . 8. Check the pump and purifier motor running amps. 9. Check the bilge level at the bottom platform . 10. Identify the maintenance wo...

1. Reverse current trip 2. Overspeed trip 3. Synchroscope 4. Aromatic voltage regulator

1. Support the shaft mounted impeller 2. It dampens the vibration and noise 3. It makes sealing b/w outlet and inlet and differential pressure too . 4. It wear itself to protect the impeller and casing .

Personnel Tanker safety . *Personnel 1. Personnel should not carry their own torch . It is should be approved type intrinsic safe torch . 2. Smoking should be done at designated places only . 3. Mobile phone , camera etc . Should not be brought to the deck .

When refrigerant like cfc's, R11, R12,R22 etc leaks to the atmosphere it rises and comes in contact with ultra violet rays and gets broken into chlorine atom . When chlorine atom attacks ozone layer it forms chlorine monoxide . And the remaining single oxygen atom attacks the chlorine monoxide to form oxygen molecule . And it releases the chlorine atom which further breaks the ozone . As shown in the reaction given below Refer Screenshot

Why we r dosing ferrous sulphate in shell and tube type heat exchanger? Ans : To form a corrosion-resistant protective coating.