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单选题
Which of the diesel engine components listed increase air density and helps to improve engine operating efficiency?（）
A
Impeller
B
Compressor
C
After-cooler
D
Exhaust differ
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单选题Which of the conditions listed may occur in an operating diesel engine if air pockets form within the cylinder head circulating water passages? （）A
Hydraulic stress and distortion will developB
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单选题Which of the listed diesel engine systems is likely to create the problem of a cylinder regularly misfiring?（）A
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单选题Which of the following methods is used to prevent throttling of compressed air through the diesel engine air starting valves?（）A
Holding the valve open for a long periodB
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Opening the stating air valve quicklyD
Reducing the starting air valve size
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单选题Which of the listed diesel engine operating conditions should be checked immediately after any diesel engine is started?（）A
Exhaust temperatureB
Lube oil levelC
Lube oil pressureD
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Misfiring or rough runningC
Damage to the valveD
All of the above
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单选题Which of the two events listed occurs simultaneously in a two-stroke/cycle diesel engine?（）A
Exhaust and scavengingB
Scavenging and compressionC
Ignition and expansionD
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单选题As soon as a diesel engine has started, which of the listed engine operating parameters should be checked FIRST?（）A
Exhaust temperaturesB
Raw water pressureC
Lube oil pressureD
Air box pressure
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单选题The expansion tank for a diesel engine closed cooling system is designed to maintain a constant head on the system and （）.A
reduce water temperatureB
reduce water turbulenceC
provide an air cushionD
allow for an increase in water volume as the engine warms up
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单选题If a diesel engine runs roughly, which of the systems listed is most likely to be at fault?（）A
FuelB
LubricatingC
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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
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单选题The diesel engine is a type of internal combustion engine which ignites the fuel by injecting it into hot, high pressure air in a （）.A
air bottleB
air compressorC
crank caseD
combustion chamber
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单选题Which of the following problems should be taken when cleaning the air filter on a diesel engine equipped with a turbocharger?（）A
Reduce engine speed to idle before removing the filterB
Soak the dirty filter in kerosene onlyC
Blow out the air inlet with compressed airD
Cover the air inlet after removing the filter
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单选题Which of the combustion parameters listed is used in a diesel engine, but NOT related to the injection system?（）A
AtomizationB
MeteringC
Effective strokeD
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Intake strokeB
Compression strokeC
Exhaust strokeD
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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
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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
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increase in ignition lagC
decrease in fuel consumption per horsepower-hourD
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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
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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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单选题Following an overhaul of a crosshead type diesel engine, the engine is jacked over with the turning gear as part of the pre-start procedure, which of the listed pre-start procedures should be carried out?（）A
Ensure proper cylinder lube oil flowB
Open all air space drain cocksC
Open all indicator valvesD
all of the above
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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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