题目内容（请给出正确答案）

[主观题]

Provision must be made in pipe systems for changes in length due to change of temperatureThe bold and italic word “provision” probably means _____.

A.flanges

B.nuts

C.expansion joints

D.bolts

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更多“Provision must be made in pipe…”相关的问题

第1题

The lube oil to lubricate the surfaces of the cylinder liners is spread over by the _____.

A.sliding piston rings

B.engines camshaft

C.small pumps

D.forced feed system

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第2题

目前公认的滑油质量分类法是根据（）分类。

A.滑油的黏度

B.滑油黏度指数

C.滑油的总碱值

D.滑油性能特点和使用条件

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第3题

When the vessel shafting are installed, the slightly inclined of the shaft line should be rectified by____.

A.adjusting the position of the intermediate bearing

B.changing the position of the main engine installation

C.adjusting the center line of the propeller

D.changing the position of the thrust block

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第4题

测量气阀定时能够间接得知（）的磨损程度如何。

A.摇臂轴

B.从动部滚轮

C.凸轮

D.摇臂

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第5题

The amount of fuel delivered for each cycle must be in accordance with the engine load, an

d the same quantity of fuel must be delivered to each cylinder for each power stroke at that loadWhich of the following statements describes this requirement?

A.Proper timing

B.Accurate metering

C.Suitable injection rate

D.Suitable atomization rate

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第6题

下列影响液体动压润滑形成油楔的因素中，错误的是（）。

A.滑油压力

B.轴承负荷

C.摩擦面相对速度

D.轴承间隙

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第7题

In order to maintain a constant outlet water temperature of 80-85℃ from the engine, a three-way valve is installed .

A.at the jacket cooler outlet to control the flux through the engine

B.at the jacket cooler outlet to control the flux through the cooler

C.at the engine outlet to control the flux through the engine

D.at the engine inlet to control the flux through the engine

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第8题

On engines having oil cooled pistons the lubricating oil pre-heater must be put into opera

tion and the rate of heating so ______ that the temperature of the piston cooling oil returns are 32 to 35℃ over a period of at least two hours.

A.slow

B.quick

C.arranged

D.high

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第9题

Diesel engine ‘blow-by’ into the crankcase is caused by excessive ring______.

A.back clearance

B.side clearance

C.gap clearance

D.taper clearance

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第10题

Which of the following marine examples belongs to the open loop control system?

A.Accommodation heating system

B.Steering gear

C.Boiler control

D.Cargo control

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