1954. The user of the schematic diagram is the mechanic

A. Magnet valves shall be marked with distinctions, is to indicate the valve spring-loaded into the open or closed position.

B. ElectroMagnetic valve shall be marked with a feature indicating whether the valve is spring-loaded into the open or closed position.

C. Solenoid valves shall be shown with a mark, is to indicate the valve spring-loaded to the open or closed position.

A. 你可以对这些条款使用备用替换。

B. 你可以对这些条款使用不同的替代。

C. 你可以对这些条款使用等效的替代。

A. Check such system to determine the cause of interference.

B. Examine part of the system to find the cause of the interference.

C. Examine all of the system to find the cause of the interference.

A. Make sure that the diameter of the hole is less than the specified value.

B. Make sure that the diameter of the hole is more than the specified value.

C. Make sure that the radius of the opening is less than the specified value.

A. These buses consume power directly from the battery.

B. These buses accept the direct current of battery.

C. The battery supplies power directly to these buses.

A. Prior to ground operations, maximum cooling of the engine bleed air is provided to avoid the overheat damage to the wing leading edge.

B. To keep the wing leading edge from overheat damage, the engine bleed air has a maximum cooling effect during ground operations.

C. While the aircraft is operating on the ground, the engine bleed air provides a best cooling to the wing leading edge to renovate the damage due to overheat.

A. That portion of the power plant system which directs and may or may not vary the mass air flow to the engine.

B. That portion of the power plant system directs and may or may not vary the mass air flow to the engine.

C. That portion of the power plant system which directs and may vary the mass air flow to the engine.

A. Do these two steps at the same time;

B. Do these two steps step by step;

C. Do these two steps one after another;

A. 批准性声明,需永久显示,类似于下面的例子。

B. 适用性声明,需突出显示,类似于下面的例子。

C. 适用性声明,需永久显示,类似于下面的例子。

A. 确保襟翼收回或者副翼配平手轮在零位。

B. 确保襟翼伸出,并且副翼调节手轮在零位。

C. 确保襟翼收回,并且副翼配平手轮在零位。