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单选题
Load control on a diesel engine is accomplished by （）.
A
regulating the speed of the turbocharger
B
rotating the fuel injector pump plunger
C
regulating the speed of the fuel oil transfer pump
D
changing engine timing
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更多 “单选题Load control on a diesel engine is accomplished by （）.A regulating the speed of the turbochargerB rotating the fuel injector pump plungerC regulating the speed of the fuel oil transfer pumpD changing engine timing” 相关考题
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An increase in load on a diesel engine results in _____ of speed of the crankshaft.A.a reductionB.an increaseC.an outingD.a downwards
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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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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A connecting rod in a four-stroke/cycle diesel engine is subject to（）A
tension load twice each crankshaft revolutionB
compression load during power and compression strokesC
inertia load once every four crankshaft revolutionsD
bending loads at bottom and top dead center
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单选题Control of the main propulsion diesel engines can be shifted from the engine room to the wheelhouse from the （）.A
wheelhouse control stationB
engine room control stationC
captains officeD
chief engineers office
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单选题The diesel engine exhaust gas bypass, as fitted with some waste heat boilers, is installed to （）A
prevent engine back pressure at heavy loadsB
increase total engine efficiency at low loadsC
prevent boiler corrosion at low engine loadsD
improve engine fuel consumption at any load
考题
单选题A diesel engine is supercharged in order to（）A
lower the no-load RPMsB
provide more air for combine with the fuelC
increase the no-load RPMsD
provide more fuel combine with the air
考题
单选题A diesel engine emits blue exhaust smoke as a result of（）A
cold intake airB
excessive compression pressureC
excessive cylinder lubricationD
a light load
考题
单选题Scuffed cylinder liner wearing surfaces in a diesel engines can result from （）A
chromium plating piston ringsB
knurling the piston skirtC
extended maximum power operationD
applying load to a cold diesel engine
考题
单选题When a diesel engine is operate at partial load, as compared to full load ,a decrease will occur in the average （）A
air quantity aspiratedB
fuel injection pressureC
combustion pressure on the power strokeD
compression on the compression stroke
考题
单选题Diesel engine control can be obtained by the bridge （）.A
at any timeB
only after the engine room control station is switched to “bridge control”C
whenever the secondary station is switched to bridge controlD
with the approval of the chief engineer only
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
考题
单选题To successfully reduce an excessively high diesel engine exhaust gas temperature, you should （）.A
reduce the engine driven fuel pump outlet pressureB
retard the fuel injector timing to reduce powerC
increase the fuel rack settingD
reduce the load on the engine
考题
单选题In a modern internal combustion diesel engine, the load carrying part of the engine is referred to as the（）A
bedplate or baseB
sump or oil panC
cylinder blockD
frame
考题
单选题Clearance volume scavenging in a turbocharged, four-stroke/cycle diesel engine is accomplished （）.A
during the valve overlap periodB
with only the exhaust valve openC
at a pressure below atmosphericD
without cooling the cylinders or pistons
考题
单选题Main diesel engine control can be obtained by the bridge （）A
at any timeB
only after the engine room control station is switched to ‘bridge control’C
whenever the secondary station is switched to ‘bridge control’D
whenever the engine side control station is switched to ‘bridge control’
考题
单选题A naturally aspirated diesel engine at full throttle will have an intake manifold pressure （）A
slightly less than atmospheric pressureB
approximately equal to exhaust manifold pressure at all timesC
that is widely fluctuating constantlyD
decreasing as engine load increases
考题
单选题Maximum horsepower of a diesel engine is attained （）.A
when the engine RPM is pulled down by overloadB
at rated engine RPMC
at 95 % of rated engine RPMD
at 95 % of a properly adjusted governor RPM with the engine under full load
考题
单选题An increase in the load on a turbocharged diesel engine operating at constant speed will result in an increase in （）A
exhaustB
air box pressureC
brake main effective pressureD
all of the above
考题
单选题An increase in load on a diesel engine results in （） of speed of the crankshaft.A
a reductionB
an increaseC
an outingD
a downwards
考题
单选题A diesel engine is equipped with an isochronous hydraulic governorA decrease in load will cause the engine speed to （）A
decrease onlyB
increase onlyC
decrease slightly then returned to original speedD
increase slightly then returned to original speed
考题
单选题If the speed of a turbocharged diesel engine is maintained constant the turbocharger speed will （）A
decrease until the engine speed increasesB
increase as the load increasesC
decrease as the loadD
increases remain unchanged
考题
单选题When the load is increased on a turbocharged diesel engine, the amount of increased air supplied by the turbocharger will（）A
lag behind the increased fuel supplied to the engineB
enter the engine along with the increase in the fuelC
enter the engine before the increased fuel supplyD
leave the turbocharger as a negative pulse
考题
单选题On a diesel engine equipped with an isochronous governor, if the “speed droop” control is reduced to the “zero” setting, the engine （）A
speed will drop drastically with any increase in loadB
will stop due to zero fuel supplyC
will stall upon application of loadD
speed will remain fairly constant despite load changes
考题
单选题Scavenging in a turbocharged, four-stroke/cycle diesel engine is accomplished（）A
during the valve overlap periodB
with only the exhaust valve openC
at a pressure below atmosphericD
without cooling the cylinders or pistons
考题
单选题What monitoring device best indicates the load being carried by a diesel engine?（）A
Lube oil pressure gaugeB
Jacket water temperature gaugeC
TachometerD
Exhaust pyrometer
考题
单选题“This increase in charge air density is accomplished on most modern diesel engine types by use of exhaust gas turbo-charging, in which a turbine wheel driven by exhaust from the engine is rigidly coupled to a centrifugal type air compressor” According to this sentence, we can know that increases density（）, drives the compressor directly（）A
a modern diesel engine；a turbine wheelB
a modem diesel engine；exhaust gasesC
a compressor；an exhaust gas turbochargerD
a compressor；a turbine wheel
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