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单选题
THE PURPOSE OF THE MIXER UNIT FLAP LOCATED IN THE MIXER UNIT IS TO:
A
Stop the air supply in case of temperature regulation failure.
B
Ensure sufficient cockpit air supply if PACK 1 is off.
C
Bypass the mixing unit in case of freezing in the pack.
答案解析
正确答案：B
解析：
题目解析
答案选项B：Ensure sufficient cockpit air supply if PACK 1 is off.
正确答案：B
解析：混合器单元中的混合器单元舵的目的是确保在PACK 1关闭时为驾驶舱提供足够的空气供应。当PACK 1关闭时，混合器单元舵可以调整空气流向，以保证驾驶舱仍然可以获得足够的空气，保持驾驶舱内的合适温度和气流。
