1. The function of the wind system is to properly organize the flow of indoor air so that the temperature, humidity and cleanliness of the air in the indoor work area can better meet the technical requirements and human comfort requirements.

2. CLF (Cooling Load Factor) is defined as the ratio of the data center cooling equipment power consumption and IT equipment power consumption.

3. The following ( ) air supply methods are mainly applicable to the craft air conditioners in lower work area where there is a large amount of waste heat to be taken away.

4. Lay anti-static floor, put on anti-static shoes and socks to prevent the formation of ( ).

5. When AC power equipment are introduced in by using three-phase four-wire system, in addition to the zero line on the near side of the power transformer grounding, electrical equipment and the engine room should be near the ground repeatedly.

6. The following air conditioning, which is comfort air conditioning?

7. Cryogenic components improve the continuous low pressure caused by low temperature start-up, thus allowing the air conditioner to start up normally.

8. The main monitoring objects of data center room monitoring system are power systems, environmental systems, fire protection systems etc

9. When using PoE (Power over Ethernet) interface, it has two functions: communication and power supply.

10. What throttle devices does Huawei air-cooled precision air conditioning use? (Multiple choice)

11. R410a refrigerant in the moment of spray out, can frostbite human skin and deeper muscles in a very short period of time and cause frostbited dermal necrosis.

12. Whare are UPS common working modes? (Multiple choice)