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单选题
To counteract these undesirable effects cylinder oils usually contain additives formulated to impart a high degree of （） and detergency.
A
salinity
B
alkalinity
C
acid
D
sanitary
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共用题干
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单选题The adverse effects of burning high sulfur fuel can be compensated for by using a cylinder oil having sufficient（）A
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floc pointC
alkalinity additivesD
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单选题Heavy fuel oils generally have an upper average ash content of 0~1% by weight.Which of the following conditions could be expected if the ash content increase above this amount?（）A
Glazing of the cylinder linersB
Increase valve wearC
Excessive oil pumpingD
Increase fuel consumption
考题
单选题The author concludes that only shared myths can help Americans ______.A
to bring about the uniformity of their cultureB
to regain their consensus about a common experienceC
to stay away from negative feelings in their lifeD
to counteract the effects of consensus about society
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单选题Fix the fuel injector into （） after repair.A
the cylinder linerB
the cylinder coverC
the cylinder jacketD
the piston
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单选题In large marine diesel engines cylinder oils usually contain additives formulated to impart the （） to clean the rings and grooves.A
inefficiencyB
oilinessC
detergencyD
purity
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单选题A practical way of checking for excessive fuel injection in one cylinder of an operating diesel engine is to （）A
feel the high pressure fuel lineB
check the cylinder exhausts for white smoke frequentlyC
check the cylinder exhaust temperatureD
isolate each cylinder and inspect the injector
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单选题What is the role the T5 plays?A
Throttles up and down to counteract the buffeting from air molecules.B
Feels the subtle variations in Earth’s tug.C
Helps accelerometers surive the launchD
Provides powerful force to counteract the drag on Goce.
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单选题The most practical way of detecting an overload in one cylinder of an operating large, low-speed ,main propulsion diesel engine is to （）A
check the cylinder exhausts for black smokeB
listen for combustion knock in that cylinderC
isolate each cylinder and inspect the injectorD
check the cylinder exhaust temperature frequently
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单选题To counteract these undesirable effects cylinder oils usually contain additives formulated to impart a high degree of （） and detergency.A
salinityB
alkalinityC
acidD
sanitary
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单选题For Vee-form engines, （） is shaped to given two slopping surface on which （） are placed at the correct relative angle to each other.A
the bottom of the column；the cylinder blocksB
the top of the column；the cylinder headsC
the top of the column；the cylinder blocksD
the bottom of the column；the cylinder heads
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单选题（）during the last repair?A
Did you have No.4 cylinder repairB
Do you have No.4 cylinder repairedC
Didn’t you have No.4 cylinder repairingD
Didn’t you have No.4 cylinder repaired
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单选题If water is found in the crankcase of a diesel engine, the cause may be due to（）A
a cracked cylinder headB
a leaky cylinder head gasketC
a cracked cylinder linerD
any of the above
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单选题The main factor determining the output of each cylinder is the cylinder （）.A
densityB
boreC
weightD
material
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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
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单选题The cylinder covers and the liners are bolted together by means of （）.A
bolts welded into the cylinder headB
bolts welded into the cylinder framesC
studs screwed into the cylinder headD
studs screwed into the cylinder frames
考题
单选题Diesel engine cylinder head test cocks are used to （）A
check cylinder lubricationB
connect the pressure indicator pressureC
test cylinder headsD
connect the exhaust gas pyrometers
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单选题（） fuel oils （） lubricating oils require treatment before passing to the engine.A
Both；andB
Neither；norC
Either；orD
Both；or
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