154.Find the source of the fuel leakage.

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. The system part is used to support the head of the aircraft when the aircraft is on the ground.

B. The part of the system is to keep the aircraft nose on the ground.

C. That portion of the system supports the nose of the aircraftwhile the aircraft is on the ground.

A. Modifications,additions and omissions,a black line should be drawn vertically at the footer outside of the page parallel to the part of the change.

B. Revisions,additions and deletions shall be identified by a vertical black line along the outside of the page opposite only that portion of the printed matter that was changed.

C. Alterations,substitutions and eliminates should be marked with a black slash outside the scope of the page to coincide with the section being changed.

A. 计量塞增加燃油量。

B. 计量塞改变滑油流量。

C. 计量塞减少燃油流量。

A. 拆除中央下显示器可以给移动速度刹车手柄提供所需的间隙。

B. 移动速度刹车手柄将提供拆除中央下显示器所需的空间。

C. 为移动速度刹车手柄提供空间,必须拆下中央下显示器。

A. The drain float valves in the vent tubes and the vent channels dilute the fuel in the vent system to drain out of the tank when the fuel face is lower than the valve.

B. The drain float valves in the vent tubes and the vent channels permit fuel in the vent system to drain into the tank when the fuel level is lower than the valve.

C. The drain float valves in the vent tubes and from the vent channels allow the fuel in the vent system to drain into the tank when the fuel quantity is lower than the valve.

A. Use a fan to suck the gases.

B. Use a turbine fan to remove the gases.

C. Use a fan to remove the gases.

A. Use a simple verb to express the approved possibility if permitted.

B. If possible,use an approved simple verb to express.

C. If allowed,use a simple verb for approving.

A. The lean fuel flow mixtures will be provided by the EGT indicators under different engine powers.

B. EGT indicators constantly monitor the lean fuel flow mixtures wherever the thrust lever is.

C. The lean fuel flow mixtures are induced by the EGT indicators to various powerplants.

A. All essential or alternating equipment installed on a particular plane when provided shall be in the equipment list.

B. The equipment list shall include all necessary or alternative equipment installed on a particular aircraft when delayed.

C. The equipment list shall contain all required or optional equipment installed in the particular airplane when delivered.