De-energize the system.

A. If the repair scheme must be changed, the approval of the design authority is hardly got.

B. If the design authority need change the repair scheme, it can get the approval.

C. If it is necessary to change the repair scheme, get the approval of the design authority.

A. There are electrically-operated valves in the ejection lines to the two engine pumps.

B. There are electronic-operated valves in the ejection lines to the two engine pumps.

C. There are electrically-operated valves in the suction lines to the two engine pumps.

A. Install the point tags on the negative overheat thermocouple of the turbine.

B. Install the terminal tags on the forward overheat thermocouple of the turbine.

C. Install the port tags on the rearward overheat thermocouple of the turbine.

A. 拆除校装销和设备，以阻止控制舵面的自由运动。

B. 拆除校装销，安装能够阻止控制舵面自由移动的设备。

C. 拆除能够阻止控制舵面自由移动的校装销和设备。

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. A servo system is a device that has the ability to carry out an order and give a response to fufill five basic requirements.

B. A servo system is a device that has the ability to carry out an order and give a response to orders. It can finish five basic requirements.

C. A servo system is a device that has the ability to respond to and carry out an order which must be able to fufill five basic requirements.

A. Move the sensor downstream and calculate the temperature again.

B. Move the probe downstream and monitor the temperature again.

C. Move the part downstream and measure the temperature again.

A. This is the maximum portion of flammable vapors in air. If the portion is bigger, when an ignition source touched the gas, it would cause the fire to be diffused.

B. This is the minimum volume of flammable vapors. If the volume is lower, when the gas contacted with an ignition source, the fire would not come out.

C. This is the minimum density of flammable vapors in air. If the density was lower, when an ignition source touched the gas, it would not cause the spread of flame.

A. 执行此步骤需要两个人。

B. 两个人来做这个工卡是必须的。

C. 最少需要两个人来做这个工作。

A. The System/Chapter, sub-System/Section and Subject Number, the page number and date of issue will disappear in the lower left-hand corner, on the left-hand pages and the review date in the lower right-hand corner.

B. The System/Chapter, sub-System/Section and Subject Number, the page number and date of issue will appear in the lower left-hand corner, on the left-hand pages and the review date in the lower right-hand corner.

C. The System/Chapter, sub-System/Section and Subject Number, the page number and date of public will appear in the lower left-hand corner, on the left-hand pages and the revision date in the lower right-hand corner.