239. RAT的收回时间约为45秒。

A. A properly set door will not locked when the aircraft is under pressurized.

B. A properly set door will not open when the aircraft is under pressurized.

C. A properly latched door will not operate when the aircraft is under pressurized.

A. 检查开口是否有从边角开始的裂纹。

B. 检查转角处的裂纹是否从这里开始。

C. 检查裂纹的开口是否有从边角开始的。

A. Lubricate one side of the washers.

B. Lubricate one side of the seals.

C. Wash one side of the washers.

A. 所得出的数据用于确定该部件是否应考虑被纳入CAP中。

B. 结果是,利用该数据来判断是否应该将这一设备纳入CAP。

C. 如果考虑将此部件纳入CAP,则需利用最终数据做出判定。

A. 正常的发动机气流旁通掉的部分,主要目的是增加发动机推力或降低燃油消耗率。

B. 正常的发动机气流旁通掉的部分,主要目的是降低发动机推力或提高燃油消耗率。

C. 发动机气流被旁通掉,主要目的是增加发动机推力或降低燃油消耗率。

A. 如果通气桅杆排气量不正常,做系统测试

B. 如果通气桅杆排气量非常多,做系统测试

C. 如果通气桅杆排气量非常少,做系统测试

A. Let the pressure become stable before each ,turn of the adjustment screw

B. Let the pressure become stable after each removal of the adjustment screw

C. Let the pressure become stable after each turn of the adjustment screw

A. 除非对系统的理解很有必要,否则不需要显示回流管。

B. 如果没有必要了解系统,则需要完整地显示回流管。

C. 除非需要了解系统,则需要部分地显示回流管。

A. The metal is has a plastic coat to prevent itself from being damaged;

B. The metal is covered outside to protect itself from damage;

C. The metal has a coating of plastic on it to prevent corrosion;

A. 做腐蚀检查。

B. 做损害检查。

C. 检查由腐蚀造成的损伤。