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单选题
In each cylinder cover is a large central opening for mounting （）
A
the indicating cock
B
the starting valve
C
air inlet valve
D
the exhaust valve
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单选题The rate of cylinder lubricating oil metered to each cylinder of a large low-speed main propulsion diesel engine is （）A
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单选题In each cylinder cover there are two or three holes for （）A
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indicator cocksD
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单选题The opening or closing of the cylinder starting valve is controlled by （）.A
the starting air distributorB
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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
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单选题Blow-off of the relief valves of the main cylinders during operation indicates （）.A
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the injector holes is cloggedC
the cams are not properly setD
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单选题In order to inspect both piston and cylinder wall thoroughly, the cylinder cover should be taken off and the piston should be （）.A
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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
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listen for combustion knock in that cylinderC
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单选题Opening of the cylinder （） will admit compressed air into the cylinder.A
safety valveB
indicator cockC
blow-down valveD
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the top of the column；the cylinder blocksD
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单选题The joint face between the cylinder cover and the liner is arranged （）the combustion process as possible.A
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单选题The main factor determining the output of each cylinder is the cylinder （）.A
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单选题In an engine with air inlet valve and exhaust valve on its cylinder heads the fresh air will enter into the cylinder （） and the gases exhaust （）, there being an adequate overlap between the inlet opening and the exhaust closing.A
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单选题On the top of the cylinder is mounted the cylinder cover which is pressed onto （） of the cylinder liner by means of nuts and studs.A
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单选题A company has a Frame Relay WAN with one central - site router and 100 branch office routers. A partial mesh of PVCs exists: one PVC between the central site and each of the 100 branch routers. Which of the following could be true about the number of EIGRP neighbor ships?（）A
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考题
单选题There is a support ring between the cylinder block and collar of the cylinder liner, thus carrying both the liner and the cylinder coverIt also passes to the cooling bores and to the cover（）A
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单选题Each cylinder in a two stroke cycle engine experiences combustion（）.A
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twice each crankshaft revolutionC
every other crankshaft revolutionD
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单选题In some type of two-stroke engines, besides some small holes for（）, starting valve, safety valve, indicator cock, and central opening in each cylinder cover for mounting the（）A
fuel valves；exhaust valveB
exhaust valves；inlet valveC
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the power strokeB
the compression strokeC
low load operation onlyD
periods of standby
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