单项选择题
Control valves of a CO2 system may be located within the protected space when（）.
A.it is impractical to locate them outside
B.there is also a control valve outside
C.the CO2 cylinders are also in the space
D.an automatic heat-sensing trip is installed
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相关考题
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单项选择题
CO2 cylinders，which protect the small space in which they are stored must（）.
A.NOT contain more than 200 pounds of CO2
B.be automatically operated by a heat actuator
C.have an audible alarm
D.All of the above -
单项选择题
CO2 cylinders equipped with pressure actuated discharge heads will discharge automatically when（）.
A.the discharge valve is open
B.the control box glass is broken
C.pressure from the control cylinders is detected
D.the control cylinders have been completely discharged -
单项选择题
Automatic mechanical ventilation shutdown is required for CO2 systems protecting the（）.
A.machinery spaces
B.cargo compartments
C.living quarters
D.galley
