Hydraulic systems include the units and components which furnish hydraulic fluid under pressure (includes pumps, regulators, lines, valves, etc.) to a common point (manifold) for redistribution to other defined systems.

A. Preset the control to get maximum thrust.

B. Set the control to get maximum thrust.

C. Reset the control to get the maximum force .

A. Gives the symbols for resistors, diodes, and other parts of the system.

B. Gives the symbols for relays, resistors, and other parts of the system.

C. Gives the symbols for relays, diodes, and other parts of the system.

A. 将车辆拉至规定的安全区域。

B. 将车辆拉至特定的、可以使用程序的区域。

C. 将车辆拉至可以使用标准程序的安全区域。

A. If there are metal fragments in the liquid sample, replace the pump.

B. If there are only small metal particles in the solid sample, replace the pump.

C. If there are metal particles in the sample solids, replace the pump.

A. All tabulations shall own a title in order.

B. All tables shall bear a title with a number.

C. All figures shall have a title with a number.

A. You can use the past form of technical verbs as adjectives.

B. You can use the past tense form of technical verbs as adverbs.

C. You can use the past participle of technical verbs as adjectives.

A. One of the safety precautions is to keep the combustible material from the work area at distance of 50ft at least.

B. One of the safety precautions is to keep the flammable material from the work area at distance of 50ft at least.

C. One of the safety precautions is to keep the combustible material from the work area at a minimum distance of 50ft.

A. 把上凸轮放到与拆下时所做标记一致的位置。

B. 上部卡箍安装的位置应该与拆卸标记保持一致。

C. 经同意后，对应拆卸时所作的标记将上部曲柄安装在位。

A. It is necessary to replace the fitter.

B. It is mandatory to replace the filter.

C. It is prohibited to replace the filler.

A. Replace the No. 1 and No. 2 computers. Then do the test again.

B. Interchange the No. 1 and No. 2 computers. Then do the test again.

C. Repair the No. 1 and No. 2 computers. Then do the test again.