D semester

Preliminaries before starting the engine

Ερώτηση 1 (Συμπλήρωση Κενών (Χαλαρή Ταυτοποίηση) — 20 βαθμοί) 

You will read instructions from a manual on preliminaries before starting up the engine. Fill in the gaps with the following words. Replenish/ supply/ prime/purified/ gradually/ rags/ ventings/ tight/ suitability/ bar/disengage/ readiness/ raise/ emerges/ ascertain/ cock/ drain/ obstructs/ ensure/ components

1. Warm up the engine using the circulating pumps to circulate the system. 2. Check all the levels of liquids in all tanks belonging to the engine. Check the cleanliness of cooling water and all cooling systems. Check the of lube oil in the sump tank and fill up with clean lubricating oil. Fill up the fuel oil service tank with fuel oil. 3. Check all shut off valves of all systems for correct position. 4. Check the of the cooling water outlets for free passage, so as to allow the air to escape from the cooling spaces of the cylinder. The cooling spaces of the turbocharger and charge air coolers are to be vented too. 5. Make an examination inside the crankcase to make sure that no tools, cleaning , devices or guide bars have been left inside. These might later impede the motion of the running gear or obstruct any ducts or pipes. 6. Put in the turning gear. Start up all cooling water and lubricating oil pumps. Put the system under service pressure and check for leakages making any found. Check all connected to the lubricating oil system for correct oil flow. the engine over by means of the turning gear with the indicator cocks (valves) open and the control gear in the top position (=stop), to that nothing the movement of the running gear. At the same time operate the hand cranks of the cylinder lubricators to satisfactory lubrication of the cylinders from the very beginning. If there are no leakages and you find everything correct, the turning gear and secure it. 7. Pump up the starting air reservoirs to their maximum pressure and them of water. Also, drain the air-coolers, the scavenge (charge)-air receiver and the spaces underneath the piston undersides. 8. (make ready for use) the fuel oil system (fuel pumps, pipes and fuel injectors) using a priming (booster) pump. For this purpose open the vent cock on the fuel filter to allow the air escape through the fuel pipe. Then open the priming plugs on the fuel valves and the pressure. Check if the fuel from the drain openings of the priming plugs without any accompanying air. 9. Finally, before putting on the staring air, check the reversing and control gear. Set the automatic starting air stop valve to “auto” position and close the vent on the starting air distribution pipe. Check water and oil pressures and report of the engine to the bridge.