Which of the following tasks does the work of data center operation and maintenance include? (multiple choice)

• A.Routine Maintenance
• B.Real-time monitoring
• C.Emergency drills
• D.Major overhaul

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When the outdoor temperature will be lower than () ℃, the outdoor unit of the air-cooled air conditioner needs to be equipped with low temperature components. ()

• A.-20
• B.-10
• C.-15
• D.-25

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Fusion800 has the function of self-starting of civil air conditioner

• A.False
• B.True

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The root standard stipulates that the voltage drop of the AC cable should be controlled within 3%. It is recommended that the voltage drop of the AC cable should be controlled within ( ) when designing the UPS system.

• A.0.02
• B.0.01
• C.0.03
• D.0.05

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Huawei air-cooled air conditioners (25kw and 42kw) one indoor unit corresponds to one outdoor unit

• A.True
• B.False

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