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单选题
The starting of a marine diesel engine is generally carried out with the assistance of （）.
A
compressed air
B
electricity
C
hydraulic oil
D
compressing air
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In an operating diesel engine, which of the following conditions is an indication of a leaking air starting valve?A.Noise coming from that air starting valveB.Continuous operation of the starting air compressorC.Zero air pressure in the air starting systemD.Overheated starting air pipe to the cylinder head
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单选题The marine diesel engine is a type of diesel engine used on ships The （） of its operation is not very difficult to understand.A
principleB
principalC
causeD
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单选题Turbocharging of marine diesel engine is achieved by two distinct methods, （） termed the constant pressure and the pulse system.A
respectableB
respectfulC
respectiveD
respectively
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单选题Stating a large propulsion diesel engine using diesel fuel during cold weather conditions can be made easier by （）A
increasing the quantity of starting airB
increasing the lube oil pressureC
heating the engine fuel supplyD
heating the engine jacket water
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单选题Generally speaking，the fuel injected into a marine diesel engine combustion chamber is ignited by（）.A
spark plugsB
glow plugsC
heat of compressionD
a magneto
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单选题One of the purposes for water cooling the exhaust manifold in marine diesel engine is to （）A
reduce lube oil temperatureB
raise exhaust temperature reduceC
excessive heating of engine roomD
reduce load on cooling water pump
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单选题Diesel engine starting difficulties due to cold intake air temperatures, can be overcome by using a/an（）A
increase in starting air pressureB
increase in lube oil viscosityC
compression expansion deviceD
jacket water heater
考题
单选题Diesel engine cylinder head test cocks are used to（）A
check cylinder lubrication prior to starting engineB
connect exhaust gas analyzers to determine engine efficiencyC
pressure test cylinder heads to check for leaksD
remove moisture accumulations from cylinder prior to starting
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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Diesel engine electric starting motors generally require heavier duty motors and motors and operate at higher voltages than comparable starting motors for gasoline engines due to（）A
higher speed requiredB
flywheel-effectC
lower starting temperaturesD
higher compression pressures
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单选题Before a marine diesel engine is started the cylinders and pistons must be （）.A
cooled to appropriate temperatureB
warmed up gradually to appropriate temperatureC
opened up and renewedD
ground and polished
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单选题Lubricating oil is supplied to the crank-pin bearings in a marine diesel engine by （）.A
internal crankshaft passagesB
immersion in oilC
splash lubricationD
injection lubrication
考题
单选题In a diesel engine, blow-by is generally the result of worn（）A
valve guidesB
oil control ringsC
valve seatsD
compression rings
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单选题The following preparations are essential for any （） of marine diesel engine before it may be started.A
doingB
makeC
turnD
operating
考题
单选题Cold weather starting of a diesel engine may be made easier by（）A
decreasing the compression ratioB
using a special fuel having a high ignition temperatureC
increasing the starting air supplyD
heating the jacket water
考题
单选题A large two-stroke/cycle direct reversing diesel engine is to be reversedPrior to the admission of starting air you must （）A
line up the engine fore restarting with light diesel oilB
reposition the fuel injection camC
change the intake and exhaust valve cam positionsD
place the starting cam in the intermediate position
考题
单选题A two-stroke/cycle diesel engine requires less starting air than a four-stroke/cycle diesel engine, of equal displacement, because the two-stroke/cycle diesel engine（）A
has little or no internal frictionB
has a lower effective compression ratioC
operates with scavenge air under a positive pressureD
operates without energy absorbing intake and exhaust strokes
考题
单选题Which of the listed pre-start procedures should be carried out prior to starting a crosshead type diesel engine after an overhaul?（）A
Pre-lube cylinders with hand cranksB
Open all air space drain cocksC
Open all indicator valvesD
All of the above
考题
单选题In heavy marine engine the practice is to drive the engine on（）which has previously been stored in starting air reservoirs.A
electric motorB
hydraulic motorC
compressed airD
turning gear
考题
单选题When starting air is admitted, a diesel engine turns over very slowly without firingThe cause may be （）A
an obstruction in an cylinderB
water accumulation in some engine cylindersC
low starting air pressureD
low scavenge air pressure
考题
单选题In an operating diesel engine, which of the following condition is an indication of a leaking air starting valve?（）A
noise coming from that air starting valveB
continuous operation of the starting air compressorC
zero air pressure in the air starting systemD
overheated starting air pipe to the cylinder head
考题
单选题Fresh water is used for the cooling of cylinder jackets and （） of the marine diesel engine.A
cylinder coversB
lubricating spaceC
crossheadD
exhaust manifold
考题
单选题The highest pressure in a diesel engine cylinder normally occurs （）.A
at TDCB
before TDCC
after TDCD
during air starting
考题
单选题The diesel engine must be started before it can run by it self For this purpose （） has to be used.A
a starting systemB
the starting airC
a starting operationD
A, B and C
考题
单选题A six-cylinder, two-stroke/cycle diesel engine is fitted with a rotary distributing air starting systemThe speed of the rotating distributor disc is （）A
one-half engine speedB
the same as engine speedC
twice engine speedD
four times engine speed
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