In engines with system, the lubricating oil can be added to the engine through the filling hole in the crankcase cover, by using a hand oil can, or through the separator pipe（）

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• A diesel engine piston ring face is in direct contact with the （）.

  A . top of the ring groove B . cylinder liner oil film C . bottom of the ring groove D . back of the ring groove

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• Your vessel is equipped with a fixed CO2 system and a fire main system. In the event of an electrical fire in the engine room what is the correct procedure for fighting the fire?（）

  A . Use the CO system and evacuate the engine room B . Use the fire main system and evacuate the engine room C . Evacuate the engine room and use the CO system D . Evacuate the engine room and use the fire main system

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• The pH value of water in a diesel engine closed cooling water system should be maintained between （）.

  A . 60 to75 B . 80 to 95 C . 100 to 115 D . 120 to 135

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• Dirt in the fuel oil system of a diesel engine can cause （）.

  A . clogged filters B . poor combustion C . overloading of the diesel D . shock of fuel line

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• An engineer, together with some motormen （）to help in the repair work.

  A . send B . sends C . was sent D . were sent

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• In a diesel engine cooling water system, a pH of 60 indicates a/an （）.

  A . slightly acidic condition B . slightly alkaline condition C . overtreatment of water D . neutral condition of water

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• If the operating element of a thermostatic valve installed in a diesel engine cooling system malfunctions, it may result in （）

  A . a low level in the engine expansion tank B . excessively high coolant pressure C . improper temperatures D . malfunctioning of the jacket water heater

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• Your vessel is equipped with a fixed C02 system and a fire main system. In the event of an electrical fire in the engine room what is the correct procedure for fighting the fire?（）.

  A . Use the C0 system and evacuate the engine room B . Use the fire main system and evacuate the engine room C . Evacuate the engine room and use the C0 system D . Evacuate the engine room and use the fire main system

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• Burning fuel with a high sulfur content in a diesel engine will （）

  A . increase thermal efficiency B . cause clogging of the fuel system C . increase the ability of the engine to start in cold weather D . produce corrosion in the cylinder and exhaust system at low load

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• What is the function of the after-cooler installed in the diesel engine air intakes system?（）

  A . Decrease the air density B . Increase the exhaust temperature C . Decrease the lube oil temperature D . Increase the air density

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• Cast iron pistons used in large propulsion diesel engines are constructed with （）

  A . not taper what so ever B . the skirt being tapered and smaller than the crown C . the skirt being tapered and larger than the crown D . the crown being tapered and smaller than the skirt

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• What is commonly used to create turbulence in a diesel engine combustion system?（）

  A . Shape of the piston crowns B . Increasing the compression ratios C . Increasing the piston crowns D . Increasing the turbocharger gear ratio

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• A diesel engine cooling water system with a pH factor of 30 indicates a condition of （）.

  A . slight acidity B . slight alkalinity C . excessive alkalinity D . excessive acidity

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• The jacket water temperature in a diesel engine closed freshwater cooling system is normally controlled by （）

  A . regulating the level of corrosion inhibitor in the primary cooling system B . the level of the freshwater expansion tank C . varying the engine load to meet temperature requirements D . the operation of the thermostatic valve

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• In a diesel engine exhaust system, the cooling of the exhaust gases below their dew point, will result in （）

  A . increased engine back pressure B . sulfuric acid corrosion C . surface pitting of the turbocharger D . moisture impingement on the turbocharger compressor blade

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• Diesel engine automated control systems may utilize sensing devices of dual function, with sensing ranges providing both alarm and engine shut down capability.Which of the key points would only require an alarm sensor?（）

  A . Lube oil pressure and temperature B . jacket water pressure and temperature C . Engine over-speed D . Lube oil sump level

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• The consistent burning of fuel oil with a high sulfur content in a diesel engine will result in （）

  A . clogged fuel injection pumps B . increased cylinder liner wear C . intake valve stem corrosion D . varnish deposit on pisto

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• The engine in a covered lifeboat is fueled with（）.

  A . kerosene B . unleaded gasoline C . diesel oil D . liquefied ga

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• In a diesel engine lube oil system, which of the following parts should be lubricated first?（）

  A . Camshaft beatings B . Main bearings C . Piston crowns D . Cylinder wall

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• In order to control thermal stresses, some types of modern engines use pistons with（）

  A . heavy wall and intensive cooling B . heavy wall and no cooling C . thin wall and no cooling D . thin wall and intensive cooling

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• Late fuel injection in a diesel engine is indicated by low firing pressure with（）

  A . high exhaust temperature B . low exhaust temperature C . fuel knock in each cylinder D . mechanical knock in each cylinder

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• When anchoring in open anchorage, chief engineer should consult with captain （）

  A . if the ship must be stand by B . if M-E should be stopped C . if keep-watching as in voyage D . if the ship must anchor two anchor

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• In the 19th century, the education system in America was deeply＿against people of color. Many black students were blocked from having advanced education.

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• Burning fuel with a high sulfur content in a diesel engine will ＿.

  A.increase thermal efficiency B.cause clogging of the fuel system C.increase the ability of the engine to start in cold weather D.produce corrosion in the cylinder and exhaust system at low loads

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