（） clearances in the main or crank pin bearings will sometimes be indicated by loss of pressure in the lubricating system before any bearing knock is heard...

第1题

[单选题] Increasing the speed of a rotary pump above its rated speed will result in which of the following conditions to occur?（）

A、Loss of suction B、Increased clearances C、Decreased clearance D、Decreased slippage

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第2题

[单选题] Excessive clearances in the main or crank-pin bearings will sometimes be indicated by （） before any bearing knock is heard.

A、loss of flow in the fuel system B、loss of pressure in the air system C、loss of flow in the lubricating system D、loss of pressure in the lubricating system

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第3题

[单选题] The insertion of shims between the foot of a marine type connecting rod and a bearing box would result in （）

A、increased compression ratio B、decreased compression ratio C、increased bearing clearance D、decreased bearing clearance

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第4题

[多选题] Customs clearance in the import-export trade is one of the traditional functions of a freight forwarder.Customs clearance measures mainly include （）。

A、declaration B、document-checking C、duty- paying D、cargo-examination

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第5题

[多选题] Customs clearance in the import-export trade is one of the traditional functions of a freight forwarder.Customs clearance measures mainly include （）。

A、declaration B、document-checking C、duty- paying D、cargo-examination

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第6题

[多选题] Customs clearance in the import-export trade is one of the traditional functions of a freight forwarder.Customs clearance measures mainly include （）。

A、declaration B、document-checking C、duty-paying D、cargo-examination

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第7题

[单选题] The bearing shells depend on the accuracy of （） to held them in a truly circular shape.

A、the gap B、the clearance C、the bore D、the housing

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第8题

[] Customs clearance in the import-export trade is one of the traditional functions of a freight forwarder.Customs clearance measures mainly include （）。

A、A.declaration B、B.document-checking C、C.duty- paying D、D.cargo-examination

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第9题

[单选题] Valve lash, or clearance refers to the （）

A、clearance between the top of the valve stem and the rocker arm B、compression of the valve springs C、clearance between the valve seat inserts and the head D、out of roundness of the fuel injection cams

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第10题

[单选题] When used with reversing reduction gears, medium-speed diesel engines should be bolted to their foundations with fitted bolts at the drive end and clearance(loosely fitted) bolts in other locations √This is done to （）

A、maintain alignment when the ship’s hull is working in heavy seas B、ensure engine vibrations correspond to the natural frequency of the hull C、permit the engine to expand away from the driven equipment as the engine heats up and expands D、maintain engine thrust bearing clearances

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（） clearances in the main or crank pin bearings will sometimes be indicated by loss of pressure in the lubricating system before any bearing knock is heard.

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