1. The camera coding can be obtained by ().

2. The straight pipe interval fixedly supported by NetCol5000-C piping is ().

3. After the UPS5000 is installed with ejector fan, you need to set the status of “Ejector Fan" as“Allow” in the menu. Otherwise, the ejector modules cannot be used normally.

4. Which of the following are the characteristics of Huawei NetCol5000-A row-level precision air conditioner cooling capacity adjustment?

5. When the single machine is working, after the function of power-off of the ups2000-g machine is prohibited, the PL port has no output when overload or battery power is low.

6. If the status of the access which collected by the network management is always open, it can be checked by (). (multiple choice)

7. If the ECC800 is configured with a SIM card, the SIM card should be installed in ().

8. () indicates the amount of electricity that can be discharged when the fully charged battery is discharged to the specified termination voltage according to certain discharge conditions. The unit is expressed in Ah (Ah) or Watt (Wh).

9. By setting the mailbox parameters, the NetEco system will send an email to notify the user according to the set rules.

10. When installing the Huawei air-cooled air conditioner, the refrigerant pipeline positive pressure is required to be () hours.

11. If the customer load cannot be power-off, what should be taken care when closing the maintenance bypass switch? (multiple choice)

12. After the NetCol5000-A25kW half-cabinet air-conditioning refrigerant pipeline is installed, do the nitrogen charge pressure maintaining, the nitrogen pressure is () Mpa.

13. The main reason for the energy-saving effect of the closed cold/hot passage is (). (multiple choice)

14. When installing the power line on the UPS5000-E, if there are different sources on the main-lines and bypass, you need to remove the copper bars connected to the bypass and main lines first, and then connect the main circuit and bypass input respectively.

15. When the status of UPS2000G battery is "NA", it may be ().

16. Among the components of the UPS5000-E, () can be hot plug. (multiple choice)

17. The functions provided by Huawei's monitoring system NetEco are: (multiple choice)

18. The assembly unit that can realize RS485/CAN to FE interface conversion is ().

19. The reason for using the EPO status interface in the parallel step of the UPS5000-E is ().

20. The principle of the () humidifier is that the high-intensity infrared lamp causes the water surface to release water vapor and diffuse into the air stream that needs to be humidified.