On B757 the external power of electrical system is checked by BPCU before supplied to its electrical network. If the EXT PWR is checked normal, the contactor is closed.

A. Possibly, the incorrect operation will occur due to the contaminated oil jet.

B. Incorrect operation is absolutely resulted from a blocked ignitor.

C. A blocked oil jet can cause incorrect operation.

A. Warning is an operating procedure, inspection , repair or maintenance practice , which if not correctly followed, could result in personal injury , or loss of life.

B. You should obey the warning in an operation procedure, check, repair or maintenance practice, otherwise person injury or death will happen.

C. Warning in an operation procedure, inspection , repair or maintenance practice should be followed seriously, whereas may involve in personal injury , or loss of life .

A. Because of the risk of contamination, you must do this task in a very clean environment.

B. To prevent environmental pollution, this task must be done in a very clean area.

C. In order to prevent contamination, the task you must do is to find a very clean environment.

A. 如果这个部件应该纳入CAP，那么使用最终数据做出判断。

B. 公司应利用现有数据判断该部件是否与CAP相关联。

C. 已用所得数据来确定是否应将该部件纳入CAP。

A. 如果可以更早地显示维护页面，则能够显示之前的测试运行数据。

B. 它会显示上次的试验数据，如果你早些展示维护页面。

C. 如果过早地显示维修页面，它将显示前一次的测试运行数据。

A. If the valve is the source of the fuel leak, discard the valve seals and install new ones.

B. If the fuel leaks out of the valve, reinstall the valve seals.

C. If the fuel leak flows towards the valve, discard the valve seals and install new ones.

A. 编号应成数字级数排列，以章节号为前缀。

B. 编号应冠以章节号，按数字顺序排列。

C. 以章节号开头，数字大小排列。

A. 应包括电路、系统、装置等的限动/解除限动程序。

B. 应包括电路、系统、单位等的钝化/再激活处理。

C. 应包括圆形、系统、装置等的惰性化/再生程序。

A. 位置计算是指系统中结合航行信息来计算飞机地理位置的部分，包括航向计算机等部件。

B. 位置计算是指系统中组合导航信息来预测飞机地理位置的部分,包括航道计算器等部件。

C. 位置计算是指系统中利用航行信息来估算飞机地理位置的部分，包括计算机基础课程等项目。

A. Each surge tank has a vent scoop and pressure relief valve on its access door.

B. The vent scoop and pressure relief valve each has an access door in the surge tank.

C. The surge tank has a vent scoop and pressure relief valve on each access door.