网友您好， 请在下方输入框内输入要搜索的题目：
题目内容
（请给出正确答案）
单选题
A number of cylinder liners are enclosed in one cast iron casing to form a （）.
A
cylinder cover
B
cylinder block
C
cylinder frame
D
bed-plate
参考答案
参考解析
解析：
暂无解析
更多 “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” 相关考题
考题
The cylinder liners are made of _____ and the cylinder surfaces are sometimes chromium-plated.A.steelB.copperC.cast ironD.stainless steel
考题
A sequence of any number of characters enclosed in the double queotes“”is called a character ______.A．arrayB．groupC．setD．string
考题
单选题The cast iron was melted and _____ into sand molds as soon as possible.A
regulatedB
relayedC
pouredD
oppressed
考题
单选题The （） chamber is enclosed between the cylinder head and piston.A
lubricationB
injectionC
coolingD
combustion
考题
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
考题
单选题The possibility of damage from operating a diesel engine at critical speeds is reduced by the use of（）.A
an isochronous governorB
elastic engine mountsC
a vibration damperD
a cast iron bed plate with good flexible qualities
考题
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
考题
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
考题
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
考题
单选题Cast irons weakness in tension and under shock loading limits its use to low pressure steam, air, oil and low speed water fittingsThe above sentence, most probably means （）.A
cast iron has weaknessB
cast iron can stand up shock loadingC
cast iron fittings are only suitable in low pressure situationD
east iron fittings are not suitable in low pressure situation
考题
单选题The cast iron（）for the cross-head are attached to the top section and seal off the crankcase.A
cylinder coverB
cross-head shoesC
guide-waysD
scavenging boxes
考题
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
考题
单选题（） of the A-frames there is a strong cast iron frame called the scavenging air box.A
At the topB
At the bottomC
In the topD
In the bottom
考题
单选题At the top of the A-frames there is a strong cast iron frame called （）.A
cylinder linerB
cylinder coverC
the gear boxD
the scavenging box
考题
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
考题
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
考题
单选题On top of scavenging air box is mounted a strong cast iron frame for each cylinder known as（）A
cooling jacketB
cylinder linerC
piston crownD
cylinder cover
考题
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
考题
单选题The cast iron guide-ways for （） are attached to the top section and seal off the crankcase.A
the connecting rodB
the cross-headC
the piston rodD
the air box
考题
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
考题
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Cast iron and gunmetal fittings are used freely in small sizes at moderate pressure; large fittings, those for high pressure and temperature are cast or mild steelIn the above sentence, the word “those” means （）.A
east iron firingsB
mild steel fittingsC
small fittingsD
large fittings
考题
单选题"Cast iron has poor corrosion resistance to sea water, especially in the presence of bronzes" Implies（）.A
east iron is a cheap materialB
cast iron can pollute sea waterC
cast iron has mere corrosive than bronzes to sea waterD
cast iron is more corrosive to sea water when it meets with bronzes
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An aluminum piston has lower inertia and higher coefficient of （） compared to that of cast iron.A
viscosityB
twisting momentsC
inertiaD
thermal expansion
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
考题
单选题Cold clearances between the skirt of an aluminum piston and the cylinder liner is about （）A
twice as large as with a cast iron pistonB
the same size as with a cast iron pistonC
half as large as with a cast iron pistonD
the same size as the crown of an aluminum piston
热门标签
最新试卷