Main Propulsion, Turbines, Boilers. Test 4

What would be the most probable cause of overheated bearings?

Charge air pressure is too low.
Lubricating oil pressure is too low.
Water in the fuel oil.
None of the mentioned alternatives

What is the purpose of the engine crankcase door's relief valves?

To relief pressure from stuffing box leakage
To relief pressure in crankcase
To relief pressure in a crankcase explosion
To avoid hot spots in crankcase

What would be the most probable cause of too high an exhaust gas temperature from one cylinder?

Water in the fuel oil system.
Air in the fuel oil system.
Leaking injection valve.
Turbo charger filter clogged.

What is the main reason for having a separate forced lubrication system for the camshaft on large cross head engines?

Because the camshaft lubrication system has a lower pressure than the circulating system.
To prevent the circulating oil in the crankcase from being contaminated with water.
To prevent the circulating oil in the crankcase from being contaminated with fuel oil.
Because the camshaft oil is different from the oil used in the engine circulating system.

What would be the most probable cause of too low exhaust gas temperature from one cylinder?

Filter for turbo charger is clogged.
The chain is slack.
Injection valve has too high opening pressure.
Air in the fuel oil system.

During operation of the main engine, the exhaust temperature increases on one of the cylinders. The turbocharger starts surging and smoke from the turbocharger inlet air filter occurs. What is the probable cause?

Fuel valve stick in open position.
High back pressure in the exhaust system
Turbocharger failure
Scavenge box fire

What would be the most probable cause of an increase in cooling water temperature in all cylinders?

Water in the fuel oil system.
Jacket water cooler is clogged.
Air in the fuel oil system.
Charge air cooler is clogged.

Why is it important to slow down the main engine RPM while water-washing the turbocharger?

To protect the bearings
Not to damage the rotor blades
To protect the blower side
To protect the exhaustgas economizer.

Review Answers

Main Propulsion, Turbines, Boilers. Test 4

Main Propulsion, Turbines, Boilers. Test 4

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