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单选题
The crankshafts on the large modern 2-stroke crosshead engines are （）big （）makes as a single unit and so are constructed by joining together individual forgings.
A
enough；to
B
too；to
C
such；so
D
so；that
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更多 “单选题The crankshafts on the large modern 2-stroke crosshead engines are （）big （）makes as a single unit and so are constructed by joining together individual forgings.A enough；toB too；toC such；soD so；that” 相关考题
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考题
单选题Large crosshead type engine generally has two lubrication systems, a function performed only by crankcase oil system is（）A
lubricatingB
coolingC
cleaningD
neutralizing
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单选题（） can be found on most medium to large merchant vessels even if the main engine is either a steam turbine or 2-stroke crosshead engine.A
The medium speed 4-stroke trunk piston engineB
The low speed 2-stroke crosshead engineC
The medium speed 2-stroke crosshead engineD
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单选题The guide shoes are secured to the crosshead by means of（）A
through boltsB
end chock boltsC
side chock boltsD
tap-bolts
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单选题Large marine diesel engines of crosshead construction generally have two systems of lubrication: a total loss system feeding the （） and a recirculation system lubricating the running gear and cooling the piston.A
cylinder liners and piston ringsB
main bearingsC
crankpin bearingsD
turboblower
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单选题The main function of tie rods in the construction of large, low speed diesel engines is to（）.A
stiffen the bedplate in way of the main bearings to increase the engines longitudinal strengthB
accept most of the tensile loading that results from the firing forces developed during operationC
mount the engine frame securely to the hull to prevent shaft coupling misalignmentD
connect the crosshead solidly to the piston rod
考题
单选题On small, low pressure, air compressors, the cylinders are usually lubricated by the （）.A
splash methodB
mechanical force feed lubricatorsC
detached sump methodD
internal cooling passages in the crankshafts and connecting rods
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单选题Convinced of the importance of education, modern states “invest” in institutions of learning to get back “interest” in the form of a large group of _____ Young men who are potential leaders.A
enlightenedB
cultivatedC
qualifiedD
nourished
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单选题Things have been changed by the following EXCEPT______.A
the use of radar systems and automated instrumentsB
the use of communication satellites and modern computersC
the joint work of meteorologists and computer scientistsD
weather information volume is large enough to compile and analyze
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单选题Following the failure of one turbocharger on a large, crosshead, main propulsion diesel engine, fitted with multiple turbochargers, which of the following actions should be taken prior to further operation of the engine? （）A
Blank off the exhaust gas inlet to the damaged turbochargerB
Secure cooling and lubrication to the damaged turbochargerC
Lock the rotor of the damaged turbochargerD
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单选题The load on the crosshead pin is always （）, so it is the （）half of the bearing which is subject to wear.A
upwards；topB
upwards；bottomC
downwards；topD
downwards；bottom
考题
单选题Today, crankshafts for large 2-stroke crosshead engines are of the （）type.A
semi-builtB
built-upC
solid forgedD
individual forged
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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It is really a modern firm. Its turnout is so large that it can notably influence the market.A
vaguely B
conspicuously C
obscurely D
famously
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单选题The position of （） on the crosshead on a large diesel engine is determined by dowel pins.A
the guidewayB
the piston rodC
the crosshead shoesD
the interlocked circlip
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单选题The A-frames carry the crosshead guides and support the engine （）.A
foundationB
seatingC
entablatureD
bedplate
考题
单选题（）diesel engines generally have two systems of lubrication:（）a total loss system feeding and a circulating system lubricating the running gear and cooling the pistons.A
Large crosshead type；crossheadsB
High speed；the cylindersC
Large crosshead type；the cylindersD
Four-stroke；pistons and cylinders
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单选题Crankshafts of medium speed engines are （） from a single piece of steel.A
unusually solid weldedB
never be solid forgedC
almost invariably solid forgedD
almost invariably be welded
考题
单选题The crankshafts of medium speed engines are almost invariably solid （） from a single piece of steel.A
forgedB
castC
madeD
shrunk
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单选题Although the crankshafts of medium diesel engines appear to be robust, they rely on the support of （） to develop their full strength.A
the piston rodsB
the crank throwsC
the thrust bearingsD
the main bearings
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单选题The closing of the exhaust valves used on a modern, large, low-speed, main propulsion diesel engine may be directly provided by （）.A
large conical springsB
compressed air pressureC
hydraulic pressureD
exhaust gas pressure
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单选题Which of the following statements about the Grimms' fairy tales is TRUE according to the passage?A
They were originally intended to be children's stories.B
Generally speaking, the tales that have endured can help children deal with the challenges life bring to them.C
A large number of the tales made it to the modern age.D
They are less violent than the children's stories being written today.
考题
单选题In some modern large diesel engines, which of the following is used as the support for the main bearings?（）A
BedplateB
BlockC
BaseD
Sump
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单选题Passages are drilled in the crankshafts of diesel engines to provide lubricating oil to the （）.A
main bearingsB
connecting rod bearingsC
piston pin bushingsD
All of the above
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