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单选题
Main propulsion engine lube oil sumps should be constructed （）
A
so as to never be integral lube
B
with a sloped bottom
C
only of nonferrous, noncorrosive metals
D
with drain/return lines terminating just above or at the designed normal level
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On a medium-speed main propulsion diesel engine, the crank-pin or crank journalbearings receive lubricating oil from( ).A.a spindle lubricatorB.an oil jetC.internal splashingD.drilled passages in the crankshaft
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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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Which of the following is operated from the main engine room console on an automated vessel?A.Fire pump and lube oil pumpB.Lube oil pump and distilling plantC.Distilling plant and shaft alley doorD.Shaft alley door and fixed CO2 release
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Loss of lubricating oil pressure to the main propulsion diesel engine will actuate a/an _____.A.over-speed tripB.audible/visual alarmC.the ships/boats general alarmD.reserve oil storage tank
考题
Lubrication for the main reduction gears used with diesel engines is usually supplied byA.oil from the main engine sumpB.an independent lube oil systemC.the stern bearing head tankD.the stem bearing sump tank
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In an auxiliary diesel engine bypass type lubricating oil system, the main lube oil pump forces_______ .A.all of the oil used by the engine through a filterB.some of the oil used by the engine through a filterC.some of the oil used by the engine through a centrifugeD.all of the oil used by the engine through a centrifuge
考题
单选题Worn main bearings in a diesel engine can result in （）A
decreased compression pressureB
increased lube oil pressureC
lower lube oil temperatureD
excessive leakage past the piston rings
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In a bypass type lubrication system for a diesel engine, the dirty oil line to the centrifuge should be taken from the （）.A
lube oil pump suction lineB
lube oil pump discharge lineC
bottom of the lube oil sumpD
outlet from the lube oil header
考题
单选题Before starting a diesel engine that has an engine driven lube oil pump, the engineer should （）.A
open the bypass lineB
cut in the lube oil coolerC
pressurize the lube oil systemD
top off the expansion tank
考题
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
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When fuel oil has seriously contaminated a diesel engine lubricating oil, you should （）.A
filter to remove the fuel oilB
use the settler to remove the fuel oilC
remove the fuel oil by centrifugingD
drain and then renew the lube oil supply
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Which of the following conditions can cause excessive lube oil consumption in a diesel engine?（）A
Low lube oil temperatureB
Dirty lube oil strainerC
Low lube oil pressureD
High lube oil temperature
考题
单选题To correct a hunting problem in a main propulsion diesel engine hydraulic governor, you should （）.A
increase the governor oil pressureB
adjust the speed droop settingC
adjust the speeder spring travelD
adjust the compensating needle valve
考题
单选题A lube oil sample taken from the main engine lube oil system has dark yellow opaque color.This is the result of （）A
water contaminationB
mixing oils of two widely different viscositiesC
overheatingD
aeration
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For a main diesel engine the lube oil in the bearings is drawn from （）, usually located in the bedplate.A
a gravity tankB
a sumpC
a vesselD
a bottle
考题
单选题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 offB
cylinder oil feed rate should be increased slightly above that used at normal sea speedC
cylinder oil feed rate should be reducedD
cylinder oil feed rate should be increased to the maximum flow capable of the metering pump
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Waste oil from the lube oil sumps of machinery may NOT be （）.A
drained into the vessels bilgesB
reclaimed for other usesC
held in a slop tankD
purified and then reused
考题
单选题The construction of the main propulsion engine lube oil sump should （）A
have no plating joints of 90B
retain the lube oil as long as possible before it recirculates through the systemC
provided drain/return lines that are no greater than 24 inches from the pump suctionD
be provided with only a perfectly horizontal bottom
考题
单选题Most large, low-speed, main propulsion diesel engines use duplex lube oil strainer to （）A
decrease the time required between cleaningsB
removes all large and small foreign objectsC
ensure a positive flow of oil at all timesD
ensure that all lube oil has been treated twice
考题
单选题Which of the listed failures, occurring in an automated diesel generator system, should cause an audible alarm at the engine room control station?（）A
Low cooling water outlet temperatureB
High lube oil pressureC
Low lube oil temperatureD
Low starting air pressure
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