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The cylinder liners are made of _____ and the cylinder surfaces are sometimes chromium-plated.
A.steel
B.copper
C.cast iron
D.stainless steel
参考答案
更多 “ The cylinder liners are made of _____ and the cylinder surfaces are sometimes chromium-plated.A.steelB.copperC.cast ironD.stainless steel ” 相关考题
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Each cylinder is closed at the top by a _____, made of a special heat-resistant steel.A.cylinder linerB.coupling flangeC.cylinder coverD.piston crown
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The main factor which determines the output of each cylinder is _____.A.the cylinder weightB.the cylinder boreC.the cylinder lengthD.the cylinder cover
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单选题Because the castings of smaller engines are not so big and heavy, （） and cylinder block may be made in one piece.A
the columnB
the jacketC
cylinder coverD
cylinder liner
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单选题One advantage of dry cylinder liners used in a diesel engine is the（）A
lower thermal expansion rates than wet linersB
greater heat transfer rate than wet linersC
greater wear resistance than wet linersD
procedure to replace dry liners is simpler than for wet liners
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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Scuffed cylinder liner wearing surfaces in a diesel engines can result from （）A
starting the engine while hotB
knurling the piston skirtC
operating the engine overheatedD
scuff resistant piston rings
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单选题A number of cylinder liners are enclosed in one cast iron casing to form a （）.A
cylinder coverB
cylinder blockC
cylinder frameD
bed-plate
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单选题If cylinder liner wear is up to maximum limits the possibility of scavenge fires will not be materially reduced until the liners are （）.A
polishedB
renewedC
adjustedD
ground
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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Why are some diesel engine cylinder liners plated on the wearing surface with porous chromium?（）A
The chromium will not wear out the piston ringsB
The chromium strengthens the liners in the way of the scavenging air portsC
Chromium eliminates the need for oil scraper ringsD
Pores in the plating aid in maintaining the lube oil film
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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
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单选题Operating a propulsion diesel engine at less than 30% of designed normal load for prolonged periods will result in （）.A
decreased fuel consumption per brake horsepowerB
more complete cylinder scavengingC
extended valve lifeD
carbon formation on combustion chamber surfaces
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单选题In order to increase the wearing resistance, the cylinder liner surfaces are sometimes （）.A
aluminum-platedB
bronze-platedC
zinc-platedD
chromium-plated
考题
单选题Each cylinder is closed at the top by a （）, made of a special heat-resistant steel.A
cylinder linerB
coupling flangeC
cylinder coverD
piston crown
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单选题Before starting the turning gear, （） should be worked by hand to minimize corrosive action on the liners.A
the indicatorsB
the starting valvesC
the cylinder lubricatorsD
the turning gear
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单选题Cylinder liners from older lower powered engines had a uniform wall thickness and the cooling was achieved by circulating cooling water through a space formed between （）.A
crown and skirtB
liner and jacketC
ring and grooveD
jacket and block
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单选题In order to distribute the side pressures over a wide area of the cylinder walls and liners, which of the listed types of pistons are used in modem low pressure air compressors?（）A
DifferentialB
TrunkC
BarrelD
Valve-in-head
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单选题The cylinder oil will have to neutralize the acidic products of combustion and have good （） properties to keep the metal surfaces clean.A
detergentB
de-oilingC
defrostingD
demulsifying
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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The lube oil to lubricate the surfaces of the cylinder liners is spread over by the （）.A
sliding piston ringsB
engines camshaftC
small pumpsD
forced feed system
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单选题The withdrawing of the cylinder liners, in general, depends on their （）.This may amount to approximately 1/120 of the diameter in some engines.A
correct maneuveringB
wearC
working efficiencyD
maintenance
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单选题A bright shiny appearance of the sealing surfaces on diesel engine compression rings indicates（）A
combustion gas blow-byB
excessive lubricationC
properly functioning ringsD
insufficient cylinder cooling
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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The cylinder covers and the liners are bolted together by means of studs （） the cylinder frames.A
screwing intoB
being screw onC
to screw onD
screwed into
考题
单选题Before pumping up the crankcase oil,（） should be worked by hand to minimize corrosive action on the liners.A
the indicatorsB
the starting valvesC
the cylinder lubricatorsD
the turning gear
考题
单选题The cylinder liners are made of （） and the cylinder surfaces are sometimes chromium-plated.A
steelB
copperC
cast ironD
stainless steel
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