270.Make sure that the actuator is in the open position.

A. That portion of the system is used to perform the cranking portion of the starting operation.

B. That portion of the system is used to perform the igniting portion of the starting operation.

C. That portion of the system is used to perform the cranking portion of the igniting operation.

A. In the event that the hydraulic pump does not deliver a pressure of 3000 psi,install the electric pump.

B. If the hydraulic pump does not supply a pressure of 3000 psi,use the electric pump.

C. Use the electric pump to achieve a pressure of 3000 psi if the hydraulic pump is out of order.

A. 缓慢地操作千斤顶,直到前起落架减震支柱被压缩。

B. 慢慢控制支架,直到前起落架的减震器稳定。

C. 除非前起落架缓冲器被压缩,不然需要慢慢地操作面板。

A. 该组件分配和过滤油液。

B. 该组件增压和过滤油液。

C. 该组件增压和旁通油液。

A. Clamps should be spaced at intervals not exceeding 24 inches.Clamps on wire bundles should be selected so that they have a snug fit without pinching wires.

B. Pins should be spaced at intervals not exceeding 24 inches.Pins on harness should be selected so that they have a snug fit without pinching wires.

C. Pins should be spaced at intervals not exceeding 24 inches.Pins on harness should be selected so that they have a snug fit without scratching wires.

A. The word given in the approved examples is not controlled

B. The word given in the approved examples is not mandatory

C. The word given in the approved examples is not a must

A. 用湿布清除座椅上所有松散的污垢。

B. 用百洁布擦拭座椅上所有的陈年污垢。

C. 用蘸满清洁剂的布去除所有污垢。

A. 显示器必须与表中的数值一致。

B. 根据显示要求必须与台架上的活门保持相同。

C. 显示结果必须与表中的数值一致。

A. Air filter needs to be replaced on regular maintenance schedule,because it often causes low flow through the equipment cooling supply system.Quickly release the tabs on the air filter housing cover to reach the filters.

B. Low flow through the equipment cooling supply system is caused by a contaminated air filter,therefore regular replacement is necessary,release the quick release tabs on the air filter housing cover to approach to the filters.

C. A blocked air filter which causes low flow through the equipment cooling supply system needs replacement on a regular maintenance schedule.Release the quick release tabs on the air filter housing cover to reach the filters.

A. When it is unlikely that the temperature decreases to -20 ℃,remove the batteries.

B. If it is possible that the temperature will decrease to -20 ℃,remove the batteries.

C. If it is possible that the temperature will decrease to -20 ℃,cut the cells.