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单选题
124.当右侧再循环抑制出现时,哪个发动机燃油回油活门被关闭When the right recycling suppression occurs, which the engine fuel return valve is closed( )
A
1、2发动机燃油回油活门被关闭 1, 2 engine fuel return valve is closed
B
1发动机燃油回油活门被关闭 1 engine fuel oil return valve is closed
C
2发动机燃油回油活门被关闭 2 engine fuel oil return valve is closed
答案解析
正确答案：C
解析：
题目解析
当右侧再循环抑制出现时，会关闭2号发动机燃油回油活门。这是因为再循环抑制通常是为了防止发动机在高转速时产生涡轮喘振或压气机涡流振荡等问题。关闭燃油回油活门可以减少燃油流量，有助于缓解这些问题。因此，正确答案是C，2号发动机燃油回油活门被关闭。
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