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单选题
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
A
电控电动且靠弹簧负载打开 electrically controlled/pneumatically actuated/The spring load to open
B
电控气动且靠弹簧负载关闭 electrically controlled/pneumatically actuated/The spring load to closed
C
气控电动且靠弹簧负载关闭 pneumatically controlled/electrically actuated/The spring load to closed
答案解析
正确答案：B
解析：
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
答案解析: 选项B是正确答案。题目中描述的供气活门是电控气动且靠弹簧负载关闭的。这意味着该活门通过电气信号控制气动执行器的动作，并在关闭时由弹簧施加的力来实现关闭。这种设计可以在电气系统失效时使用弹簧将活门保持关闭状态，确保系统的安全性和可靠性。
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