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What is an advantage of diesel over steam turbine propulsion ________.
A.Less fuel consumption per SHP
B.Diesel fuel costs less than bunker C or its equivalent
C.Less routine maintenance required
D.Less weight per SHP
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更多 “ What is an advantage of diesel over steam turbine propulsion ________.A.Less fuel consumption per SHPB.Diesel fuel costs less than bunker C or its equivalentC.Less routine maintenance requiredD.Less weight per SHP ” 相关考题
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The main propulsion diesel continues running after you try to shut down. You should now attempt to .A.stop the fuel oil booster pumpB.engage the jacking gearC.secure the lube oil pumpD.shut off the fuel at the settling tank
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Crankcase explosions in propulsion diesel engines result from ____.A.the splashing of lubrication oil by the crankshaftB.the dilution of crankcase oil with particles of combustionC.broken fuel lines spraying oil on the crankcaseD.the ignition of unburned fuel and air in the crankcase
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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
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The separation of impurities and water from ______is essential for good combustion of diesel engines.A.lube oilB.fuel oilC.turbine oilD.grease
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What is an advantage of a gate valve over a butterfly valve ________.A.Less frequent maintenanceB.Faster operationC.CheaperD.More compact
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单选题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 gearingB
a minimum speed for the engines that limits the minimum speed of the vesselC
the higher fuel consumption per SHPD
the low efficiency of the system when a controllable pitch propeller is used
考题
单选题If a diesel engine driving a generator turns over freely but fails to fire properly, the cause could be ()A
excessive compression pressureB
air in the fuel linesC
high fuel pressureD
excessive load
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单选题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 deviceB
Interrupt the fuel flow to the engineC
Disengage the safety interlockD
Slide the camshaft to the neutral position
考题
单选题For most diesel propulsion and generator engines, the over-speed trip device will stop the engine by ()A
moving the governor control to stopB
shutting off the lubricating oil supplyC
tripping the governor emergency stop leverD
shutting off the fuel supply
考题
单选题What is the best way of stopping an over-speeding diesel engine?()A
Disconnect the battery cables from the starting motorB
Drain the hydraulic fluid from the governor sumpC
Block the flow of cooling air to the radiatorD
Secure the fuel supply and block the air intake
考题
单选题If a tow-stroke/diesel engine is over-speeding due to leakage of lube oil into the cylinders, what should you do to stop the engine?()A
Move the fuel control mechanism to the no fuel positionB
Block the fuel supply by closing the master fuel valveC
Shut off the fuel supply and block the flow of intake airD
Relieve all pressure in the fuel system
考题
单选题The diesel engine consumes considerably less fuel than the steam engine for equal output, () enables a motor-ship to load more cargo.A
whyB
whichC
in whichD
on which
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单选题Starting a large low-speed propulsion diesel engine on diesel fuel during cold weather conditions, will be made easier by ()A
increasing the quantity of starting airB
increasing the lube oil pressureC
heating the engine fuel supplyD
heating the engine coolant
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单选题Which of the conditions listed could cause the cylinder relief valves on a large, low-speed, propulsion diesel engine to lift?()A
Plugged injector nozzlesB
Excessive fuel injectionC
Very late injection timingD
Incorrect crankshaft clearance
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单选题Operating a propulsion diesel engine at less than 30% of designed normal load for prolonged periods will result in ().A
decreased fuel consumption per brake horsepowerB
more complete cylinder scavengingC
extended valve lifeD
carbon formation on combustion chamber surfaces
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单选题What is an advantage of a steam turbine over a diesel for the main propulsion?()A
Faster response from ahead to asternB
Less fuel consumptionC
Cheaper initial installation costD
Less weight per unit of horsepower
考题
单选题What is an advantage of diesel over steam turbine propulsion? ()A
Less fuel consumption per SHPB
Diesel fuel costs less than bunker C or its equivalentC
Less routine maintenance requiredD
Less weight per SHP
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Thermostatic steam pressure reducing valves are used in the fuel oil service system to control the()A
double bottom fuel oil tank temperatureB
heater supply steam flowC
pressure of the fuel supplied to the burnersD
attemperator steam flow in the heater discharge circuit
考题
单选题Crankcase explosions in propulsion diesel result from()A
the splashing of lubrication oil by the crankshaftB
the dilution of crankcase oil with particles of combustionC
broken fuel lines spraying oil on the crankcaseD
the ignition of unburned fuel and air in the crankcase
考题
单选题If a diesel engine turned over at normal cranking speed but failed to start, the cause could be late fuel injection or ()A
excessive fuel pressureB
high lube oil viscosityC
inadequate fuel injectionD
excessive starting air pressure
考题
单选题Prior to starting, the purpose of turning over a main propulsion diesel engine with the cylinder test cocks open, is to ()A
test the starting systemB
remove condensation from the cylindersC
check the compressionD
check for proper lube oil pressure
考题
单选题A large, low-speed, crosshead, main propulsion diesel engine using residual fuel oils must have a cylinder oil having a ()A
low TBN valueB
high alkaline reserveC
low flash pointD
high pour point
考题
单选题What causes diesel fuel to be ignited in the cylinder of an operating diesel engine?()A
Spark plugB
Heat of compressionC
CarburetorD
Glow plug
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单选题Prior to starting most medium-speed propulsion diesel engines, which of the procedures listed should be observed?()A
The expansion tank should be topped offB
The thermostatic water regulating valves should be manually openedC
The fuel filters should be changedD
The engine should be turned over slowly with the indicator cocks open
考题
单选题The main propulsion diesel continues running after you try to shut downYoushould now attempt to()A
stop the combustion air supplyB
engage the jacking gearC
secure the lube oil pumpD
shut off the fuel at the day tank
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
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