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单选题
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


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考题 When the ship, its main propulsion device equipped with clutch, arrived at the port and finished with the engine, the correct operation should be______.A.disengaging the clutch firstly, then stopping the main engineB.stopping the main engine firstly, then disengaging the clutchC.stopping the cooling water pump firstly, then stopping the main engineD.stopping the main engine and disengaging the clutch at the same time

考题 In a main propulsion turbocharged diesel engine, the speed of the turbocharger varies according to the _____.A.governor droopB.speeder spring tensionC.fuel rack lagD.load on the engine

考题 单选题On a large low-speed main propulsion diesel engine, lower main bearing wear is usually measured by using a/an ()A dial indicatorB outside caliperC bridge gaugeD tram rod

考题 单选题Telescopic pipes to the piston of a large slow-speed main propulsion diesel engine are designed to prevent ().A excessive crankcase pressureB excessive lube oil temperatureC contamination of the lube oil by waterD contamination of the cooling water by lube oil

考题 单选题The power developed by a large slow-speed main propulsion diesel engine is dependent upon the ()A quantity of air it takes in and retains in the cylinders during a given time periodB proportion of trapped air that is utilized in the combustion processC thermodynamic efficiency of the engine cycleD all of the above

考题 单选题The purpose of an oil mist detector in a main propulsion diesel engine is to warn of ()A excessive mist density in the crankcasesB excessively high crankcase vacuumC excessively high bearing temperatureD excessive carbon buildup in the lube oil

考题 单选题In order to start a large, low-speed, main propulsion diesel engine on high viscosity fuel after an extended shutdown, the ()A fuel must be preheatedB intake air should be preheatedC lube oil outlet temperature should be increased 20℃ above normalD none of the above

考题 单选题What color exhaust will be exhibited when a slow speed two-stroke/cycle main propulsion diesel engine, designed to operate on light and heavy fuel oil, is operated on insufficiently preheated heavy fuel oil?()A WhiteB BlackC BlueD Clear

考题 单选题When the general alarm is sounded continuously, the engine room personnel should ().A proceed to their man overboard stationsB start the fire pumpC put on lifejackets and go to their abandon ship stationsD secure the propulsion diesel engines and evacuate the engine room

考题 单选题If a main propulsion diesel engine hunts excessively at idle speed, you should ()A adjusts the idle speed controlB drain and flushes the governor and replace the oilC adjusts the compensating needle valve

考题 单选题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 inertiaB Admission of starting airC The way of the vesselD securing of fuel to the cylinders

考题 单选题Loss of lubricating oil pressure to the main propulsion diesel engine will actuate a/an ().A overspeed tripB audible/visual alarmC the ships/boats general alarmD reserve oil storage tank

考题 单选题In a large, slow-speed, main propulsion diesel engine, which of the parts listed is under tension when the engine is running?()A Bed plateB ColumnC EntablatureD Tie rod

考题 单选题A large, low-speed, main propulsion diesel engine uses sea water to directly cool the ().A cylinder headsB exhaust valvesC scavenging airD injectors

考题 单选题On a medium-speed main propulsion diesel engine, the crank-pin or crank journal bearings receive lubricating oil from ().A a spindle lubricatorB an oil jetC internal splashingD drilled passages in the crankshaft

考题 单选题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 systemB Cavitation in the cooling water pumpC Opened vent in the cooling systemD Restricted water passages in the engine

考题 单选题When the ship, its main propulsion device equipped with clutch, arrived at the port and finished with the engine, the correct operation should be()A disengaging the clutch firstly, then stopping the main engineB stopping the main engine firstly, then disengaging the clutchC stopping the cooling water pump firstly, then stopping the main engineD stopping the main engine and disengaging the clutch at the same time

考题 单选题To determine the main bearing clearance of a propulsion diesel engine, you should measure the main bearing shell using a ball anvil outside micrometer and measure the crankshaft journal using a/an ()A telescopingB ring ‘snap’ gaugeC inside vernier caliperD outside micrometer

考题 单选题In a main propulsion turbocharged diesel engine, the speed of the turbocharger varies according to the ()A governor droopB speeder spring tensionC fuel rack lagD load on the engine

考题 单选题When a ship is entering to narrow waterway and the fuel feeding of the main engine is keeping unchanged, which of the following is the wrong conclusion?()A the power of main engine will be reducedB exhaust temperature will be increasedC the speed of the ship will be reducedD the propulsion characteristic of propeller will keep unchanged

考题 单选题The closing of the exhaust valves used on a modern, large, low-speed, main propulsion diesel engine may be directly provided by ().A large conical springsB compressed air pressureC hydraulic pressureD exhaust gas pressure

考题 单选题An indication of an overloaded main propulsion diesel engine is ()A white smoke in the exhaustB high exhaust gas pyrometer readingsC sparks in the exhaustD blue smoke in the exhaust

考题 单选题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 fuelB The temperature of the fuel from the pre–heater should be gradually reduced after switching over the three–way valveC The heating steam to the pre-heater should be secured as soon as the diesel fuel passes through the three-way valveD The heating steam must be secured before the diesel oil passes through the three-way valve

考题 单选题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 injectionB excessive bearing play within the running gearC overloading of the cylinderD all of the above