1543.The supply and exhaust fans install with V-band clamps.Arrows show the correct direction of flow.The supply and exhaust fans are interchangeable.

A. If a supply shutoff valve was closed within five minutes,no maintenance performance is needed and shutoff periods are not accumulated.

B. Maintenance action is not necessary and shutoff periods are not calculated unless the shutoff valve was closed for less than five minutes.

C. When a supply shutoff valve was closed for five minutes,maintenance action is hardly requiredand shutoff duration are not included.

D. C.When a supply shutoff valve was closed for five minutes,maintenance action is hardly requiredand shutoff duration are not included.

A. 任何以 ATA No.100 格式发布的技术数据将满足本规范的要求，尽管预期在没有 ATA-100 要求的情况下将使用第 19 段格式。

B. 任何以 ATA No.100 格式发布的技术数据将满足本规范的要求，但在没有预见 ATA-100要求的情况下，将使用第 19 段格式。

C. 任何以 ATA No.100 格式发布的技术数据将满足本规范的要求，但在预见不需要满足ATA-100 要求的情况下，将使用第 19 段格式。

A. Isolate the section that is causing the trouble.

B. Separate the part that is causing the fault.

C. Identify the part that is causing the error.

A. Do not smell the compound fumes.

B. Do not smell the solvent fames.

C. Do not breathe the solvent fumes.

A. 尽管建议使用阴影、双向阴影、屏蔽或相似的方法,使用颜色也是允许的。

B. 虽然建议使用阴影、交叉阴影、筛选或类似的方法,但使用颜色是允许的。

C. 虽然建议使用阴影、剖面线、筛选技巧或类似的方法,但使用颜色是允许的。

A. The supplements of CAP are the airplane's maintenance manual (or Instructions for Continuing Airworthiness).The CAP is the primary document containing the aircraft's continuous airworthiness procedures.

B. The airplane's maintenance manual (or Instructions for Continuing Airworthiness) serves as the main document that contains the procedures to ensure the continuing airworthiness of the airplane.CAP is a supplementation to the manual.

C. CAP supplements the airplane's maintenance manual (or Instructions for Continuing Airworthiness).The supplements are the major document and involve in the procedures for the continuing airworthiness of the airplane.

A. Make sure that chemical compound are not near the engine nozzle.

B. Make sure that solvents are not near the engine exhaust.

C. Make sure that there's no isopropyl alcohol near the engine exhaust port.

A. The cover title shall be "Pilot's Operating Handbook" or "Pilot's Operating Handbook and FAA Approved Airplane Flight Manual".

B. The topic cover shall be "Pilot's Controlling Manual" or "Pilot's Controlling Manual and FAA Accepted Airplane Flight Manual".

C. The page topic shall be "Pilot's Managing Handbook" or "Pilot's Managing Handbook and FAA Authorized Airplane Flight Manual".

A. The section of the engine system which contains the turbine shafts and reduction gears.

B. The section of the engine system which contains the propeller shafts and reduction gears.

C. The section of the engine system which contains the connection shafts and reduction gears.

A. An internal failure in this type of switch may allow the switch to remain closed even though the toggle or button returns to the OFF position.

B. An inner fault of this kind of switch may keep the switch clogged despite the knob or pushbutton returning to the OFF position.

C. An interior loss which occurs in this type of switch,may stay closed in spite of the OFF position of the knob or button.