A、 The repair limits are not permitted as special equipment is required.
B、 The repair limits are not mentioned as special equipment is required.
C、 The repair limits are not set as special equipment is required.
答案：B
A、 The repair limits are not permitted as special equipment is required.
B、 The repair limits are not mentioned as special equipment is required.
C、 The repair limits are not set as special equipment is required.
答案：B
A. You can use the module to disassemble the disassembly fixture.
B. The module that you can use to disassemble is the disassembly fixture.
C. You can use the disassembly fixture to disassemble the module.
A. During antenna installation, disregard the direction the alignment arrow is pointing.
B. Align the antenna in the opposite direction in consideration of the alignment arrow in installation.
C. When installing the antenna, make sure the alignment arrow is directed towards the front.
A. These tests shall be independent.
B. These tests shall be self-locking.
C. These tests shall be comprehensive.
解析：这道题考察的是对英语词汇的理解能力。在题干中，我们需要理解"self-contained"这个词的含义。"Self-contained"意味着能够独立存在或运行，不需要依赖其他事物。因此，正确答案是A:These tests shall be independent。
举个生动有趣的例子来帮助理解，就好比一辆太空飞船必须是self-contained的，它需要携带足够的氧气、食物和水，不依赖外界资源。如果飞船不self-contained，就无法在太空中独立运行。所以，这道题的意思就是这些测试必须是独立的，不依赖其他因素。
A. The airworthiness and safe operation of an airplane is assured if it＇s used as its original design purpose, properly inspected and carefully maintained.
B. The manufacturer is intended to utilize an airplane with sound inspection and maintenance practices because that is the basis for assuring the airplane remains airworthy and safe to operate.
C. The airplane is designed to be used as the manufacturer＇s intention. Users shall properly inspect the airplane and do sufficient maintenance to assure its airworthiness and operation safety.
A. By using the basic provisions of FAR 21.50, revisions become consistent with the format of the specification.
B. FAR 21.50 provisions are the basic to the revisions which are consistent with the format of the specification.
C. To make revisions consistent with the format of the specification, the provisions of FAR 21.50 should be adopted as a basis.
A. The associated warning light should illuminate after 30 seconds.
B. The associated caution light should deactivate after a duration of 30 seconds.
C. The caution light, regardless of its position, should turn off within 30 seconds.
A. The function of the portable water system is to store and send drinking water to the passengers.
B. The potable water system must keep and transfer the water to the toilet for washing only.
C. The purpose of the drinking water system is to store and deliver the water for drinking.
解析：解析：这道题考察的是客车的车钩采用的是什么装置。鞍式复原装置是用于铁路机车的一种装置，用于连接车辆。而客车的车钩通常采用的是自动钩挂装置或者其他类型的连接装置，因此新造客车的车钩不会采用鞍式复原装置，所以答案是错误。
生活中，我们可以通过类比来理解这个知识点。就好比我们平时乘坐的公交车或者地铁，车厢之间连接的部分通常是通过自动钩挂装置来连接的，而不是铁路机车上使用的鞍式复原装置。这样就更容易理解客车的车钩不会采用鞍式复原装置这个观点了。
A. Make sure to dim the panel lights during day and night operation.
B. During night operation, make sure that the panel lights are moderately bright.
C. Ensure that the panel lights are set to a dim setting during night operations.
A. The filter must be replaced before putting new oil in the system.
B. The replacement of the filter is optional before refueling the system.
C. The filter can not be replaced unless you put new oil in the system.
A. Take care to the absence of leakage during the execution of each step in the valve test.
B. Throughout the valve test, verify that there are no obvious signs of leakage at each step.
C. Make certain that no leakage is present as you proceed with each step of the valve test.
