266.真空发生器何时运转( ) When dose the vacuum generator run?

　只在地面 Only on the ground

　在地面和低高度时 On the ground and low altitude

　只在空中 in flight only

正确答案：B

解析：

真空发生器运转时间解析：正确答案为B：在地面和低高度时。解析：真空发生器用于产生真空压力，一般用于一些飞机系统，如厕所冲洗等。根据题目，真空发生器在地面和低高度时运转，这是因为在这些情况下，大气压力不足以产生所需的真空。在地面和低高度时，真空发生器会运行以确保系统正常工作。因此，正确答案是选项B。

题目纠错

A330机型熟悉课程试题

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436.调温空气调压活门(配平空气压力调节活门)由谁控制( )The Trim Air Pressure Regulating Valve is contorled by ( )

435.再加热的作用是( )What is the function of the reheater

434.组件控制器的通道1和通道2是( )Two identical lane 1 and lane 2 of Pack Controller

433.配平空气供气活门由( )The Trim Air Valves are controlled from( )

432.调温空气关断活门(配平空气关断活门)的功能是( )What is the function of the trim air shut-off valve

431.调温空气调压活门(配平空气压力调节活门)的功能是( )What is the function of the Trim Air Pressure Regulating Valve

430.再循环活门的功能是( )What is the function of the recirculation valve?

429.空调仓通风的供气活门是( )What type is the turbofan supply valve of the air conditioning compartment ventilation system

428.控制座舱温度的计算机是( )Which is the control cabin temperature computer

427.增压控制计算机与外排活门马达的控制关系是( )The control relationship between the CPC and the motor of outflow valve