相关题目
An electric （ ） provides fuel under pressure for engine starting and as a backup, should the engine e-driven pump malfunction.
The （ ） system works well in high wing airplanes where the fuel tanks may be positioned above the engine and the difference in height between the wing-mounted fuel tanks and the engine allows the fuel to flow under sufficient pressure to the engine.
The （ ） system is usually found in low-wing airplanes, where the fuel tanks may be located below the engine.
The gravity-feed fuel system does not include （ ） ．
There are two general types of fuel systems, which are （ ） systems.
（ ） is considered a back-up source of heading information.
When properly set, （ ） is the primary source of heading information.
Which of the following about gas turbines on A/C is not right?
The （ ） is the only flight instrument that provides both pitch and bank information. It uses an artificial horizon and miniature airplane to depict the position of the airplane.
The （ ） was one of the first instruments to be installed in an airplane, and it is still the only direction seeking instrument in many airplanes.
