The main propulsion diesel continues running after you try to shut downYoushould now attempt to（）

相似题目

• A large, low-speed, crosshead, main propulsion diesel engine using residual fuel oils must have a cylinder oil having a （）

  A、the use of a poor quality oil B、the deterioration of its properties C、the formation of deposits D、the reduction in heat transfer ability

  查看最佳答案

• Loss of lubricating oil pressure to the main propulsion diesel engine will actuate a/an （）.

  A . overspeed trip B . audible/visual alarm C . the ships/boats general alarm D . reserve oil storage tank

  查看最佳答案

• A possible cause for an individual piston to knock when at TDC on a slow-speed, two-stroke/cycle main propulsion diesel engine could be due to （）

  A . early fuel injection B . excessive bearing play within the running gear C . overloading of the cylinder D . all of the above

  查看最佳答案

• When running a large, low-speed, main propulsion diesel engine on heavy fuel, which of the following precautions should be observed when switching back over to diesel oil?（）

  A . The diesel oil must never be allowed to mix with the heavy fuel B . The temperature of the fuel from the pre–heater should be gradually reduced after switching over the three–way valve C . The heating steam to the pre-heater should be secured as soon as the diesel fuel passes through the three-way valve D . The heating steam must be secured before the diesel oil passes through the three-way valve

  查看最佳答案

• During maneuvering operations for a direct reversing large, low-speed, main propulsion diesel engine, which of the following actions is used to stop the shaft from turning prior to reversing the engine rotation?（）

  A . Flywheel inertia B . Admission of starting air C . The way of the vessel D . securing of fuel to the cylinder

  查看最佳答案

• On a medium-speed main propulsion diesel engine, the crank-pin or crank journal bearings receive lubricating oil from （）.

  A . a spindle lubricator B . an oil jet C . internal splashing D . drilled passages in the crankshaft

  查看最佳答案

• When attempting to start a main propulsion diesel engine, the engine, the engine turns at the proper speed but will not startYou should check the（）

  A . starting air pressure B . scavenge air pressure C . over-speed trip D . banjo oiler line

  查看最佳答案

• A water jacket is placed around the exhaust manifolds of propulsion diesel engines to（）

  A . reduce heat radiation to the engine room B . aid in preventing turbocharger overheating C . condense and drain moisture from exhaust gases D . dampen exhaust gas pulsations in the manifold

  查看最佳答案

• In a main propulsion turbocharged diesel engine, the speed of the turbocharger varies according to the （）

  A . governor droop B . speeder spring tension C . fuel rack lag D . load on the engine

  查看最佳答案

• The opening of an exhaust valve on a modem, large, low-speed, main propulsion diesel engine may be actuated by （）.

  A . direct action of cam shaft B . compressed air pressure C . hydraulic “push rods” D . direct action of the main piston moving dow

  查看最佳答案

• A large, low-speed, main propulsion diesel engine uses sea water to directly cool the （）.

  A . cylinder heads B . exhaust valves C . scavenging air D . injector

  查看最佳答案

• Large, two-stroke/cycle, main propulsion, diesel engine cylinders can be successfully pressure charged during normal operation, by using the （）.

  A . exhaust gas temperature system B . exhaust load system C . constant or pulse pressure system D . constant volume system

  查看最佳答案

• On a large low-speed main propulsion diesel engine, lower main bearing wear is usually measured by using a/an （）

  A . dial indicator B . outside caliper C . bridge gauge D . tram rod

  查看最佳答案

• Mist detectors used on large low-speed main propulsion diesel engines monitor and check for the presence of （）.

  A . fuel oil vapor at the sludge tank vent B . unburned fuel vapors in the scavenge air receiver C . lube oil vapors in the crank case D . lube oil vapors in the engine room

  查看最佳答案

• Which of the following problems can cause fluctuating pressures in the closed cooling system of a main propulsion diesel engine?（）

  A . Defective temperature controls in the system B . Cavitation in the cooling water pump C . Opened vent in the cooling system D . Restricted water passages in the engine

  查看最佳答案

• Prior to starting most medium-speed propulsion diesel engines, which of the procedures listed should be observed?（）

  A . The expansion tank should be topped off B . The thermostatic water regulating valves should be manually opened C . The fuel filters should be changed D . The engine should be turned over slowly with the indicator cocks ope

  查看最佳答案

• Which of the listed types of starting systems is often used on large, low-speed, direct reversing, main propulsion diesel engines?（）

  A . Electric B . Hydraulic C . Air D . All of the above

  查看最佳答案

• Most large, low-speed, main propulsion diesel engines use duplex lube oil strainer to （）

  A . decrease the time required between cleanings B . removes all large and small foreign objects C . ensure a positive flow of oil at all times D . ensure that all lube oil has been treated twice

  查看最佳答案

• While underway, which of the following would be the FIRST step in reversing a direct reversing large, low-speed, main propulsion, diesel engine?（）

  A . Manually trip the over-speed device B . Interrupt the fuel flow to the engine C . Disengage the safety interlock D . Slide the camshaft to the neutral positio

  查看最佳答案

• One major disadvantage of a low-speed diesel as compared to a steam main-propulsion system is（）.

  A . the extra weight required for the diesel reduction gearing B . a minimum speed for the engines that limits the minimum speed of the vessel C . the higher fuel consumption per SHP D . the low efficiency of the system when a controllable pitch propeller is used

  查看最佳答案

• Critical speeds occurring within the operating speed range of a main propulsion diesel engine may be changed, or have their damaging effects reduced by a/an （）

  A . engine support vibration isolator B . detuner or viscous fluid damper C . lightened crankshaft flywheel D . spherically seated crankshaft bearing

  查看最佳答案

• Thermocouple pyrometers are used on large, main propulsion diesel engines to indicate the temperature of the（）

  A . cooling water leaving each cylinder B . fuel oil entering the injector C . exhaust gases at various locations D . lube oil at the bearing supplie

  查看最佳答案

• The main propulsion diesel engine jacket water temperature rises above normal, with the raw water sea suction and the expansion tank water level being normalWhich of the following problems is most likely the cause?（）

  A . Faulty thermostatic bypass valve B . Eroded zinc pencils in the heat exchanger C . Steam formation in the expansion tank D . Excessive leakage from jacket water pump seal

  查看最佳答案

• If it becomes necessary to cutout an individual cylinder of a large, low-speed, main propulsion diesel engine, the fuel to that cylinder should be secured and its （）

  A . fuel pump should be removed and all connections blanked off B . cylinder oil feed rate should be increased slightly above that used at normal sea speed C . cylinder oil feed rate should be reduced D . cylinder oil feed rate should be increased to the maximum flow capable of the metering pum

  查看最佳答案