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| Section | Objectives |
|---|---|
| Safety and Compliance | - Operational safety standards - Fire protection systems |
| Cooling Systems | - Thermal management and airflow design - Air conditioning systems in data centers |
| Data Center Infrastructure Fundamentals | - Data center architecture overview - IT equipment and facility integration basics |
| Power Systems | - UPS systems and backup power - Power distribution principles |
| Facility Monitoring and Maintenance | - Environmental monitoring systems - Fault detection and routine maintenance |
>> Latest H20-923_V1.0 Test Questions <<
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NEW QUESTION # 24
During routine maintenance of the lithium battery cabinet, which of the following areas should be protected from electric shocks caused by exposed hands or metal objects?
Answer: A,B,C,D,E
Explanation:
In a lithium battery cabinet, any exposed conductive part that is electrically connected to the DC power path can present shock and arc risk, especially when technicians are using tools in a narrow space. Thegeneral positive/negative terminalsare the cabinet-level high-energy connection points, and accidental contact or bridging with a metal object can cause severe DC arcing, burns, and equipment damage. Thebattery positive and negative terminalson individual modules are also hazardous because each module contributes to the total string voltage and fault current capability. In addition, theshort-circuit copper bar between battery modulesis a direct conductive link in the series/parallel connection; it can be energized and can create an instant short circuit if contacted by tools, jewelry, or loose hardware. Huawei maintenance safety practice therefore requires insulating covers, protective shields, and strict tool control to prevent exposed hands or metal objects from contactinganyof these areas. Protecting all listed points reduces electric shock risk, prevents arc flash/arc burn incidents, and avoids unintended cabinet trips or permanent damage to terminals and busbars.
NEW QUESTION # 25
Which of the following can be used to start the inverter of the UPS5000-H?
Answer: A,D
Explanation:
For the Huawei UPS5000-H, inverter startup is executed through the UPS's own control interfaces, which provide the "Running Control / Inv. ON" operation with the required confirmations and permissions. The UPS LCD (MDU touchscreen) supports inverter startup through menu operations such as selecting inverter start functions and confirming the action after authentication. The UPS WebUI also provides the same operational control path, where an operator logs in and issues the Inv. ON command under the UPS monitoring/running control pages. These two interfaces are part of the UPS monitoring and control design and are explicitly used for commissioning and routine O&M actions.
By contrast, ECC (data center controller) and NetEco (management platform) are mainly used for site-level monitoring, alarm collection, visualization, reporting, and centralized management.
While they can display UPS status and alarms (and may integrate with UPS data), inverter startup is defined as a UPS running control operation performed on the UPS's LCD or WebUI control plane to ensure proper authorization, safety checks, and command traceability.
NEW QUESTION # 26
Which of the following interfaces is used to connect the controller and the main control module of the unit?
Answer: A
Explanation:
In Huawei precision cooling units, the LCD controller (human-machine interface) must exchange real-time operating data and commands with the unit's main control module while also receiving a stable low-voltage power supply. This connection is typically implemented as alow-voltage communication bus plus DC power, which is why the interface is identified asI2C/12V. TheI2Cportion provides the data channel used for status display, parameter viewing/setting (within permission scope), alarm presentation, and command delivery (such as mute, reset, or control enable actions). The12 Vportion supplies power to the controller so it can operate independently of high-voltage power circuits and remain safe to access during routine O&M.
Interfaces likeDPandUSBare not used as the internal control link between the HMI and the main control board in this type of unit, and "SW" is not the designated controller-to-main-board interface in the standard wiring definition. Therefore,I2C/12Vis the correct selection.
NEW QUESTION # 27
The UPS5000-H-1200 kVA and UPS5000-H-1600 kVA have two power cabinets and one bypass cabinet, and are equipped with the MDU, ECU, and surge protection box.
Answer: B
Explanation:
This statement is incorrect because it combines two different frame configurations into one description. In the UPS5000-H family, cabinet composition depends on capacity. For the UPS5000-H-1200 kVA, the user manual's exterior description shows a single power cabinet plus a bypass cabinet, together with the MDU. In other words, 1200 kVA is not described as "two power cabinets + one bypass cabinet" in its standard cabinet topology. By contrast, the UPS5000-H-1600 kVA is a wider frame and its maintenance/structure description explicitly shows Power cabinet 1, Power cabinet 2, and a bypass cabinet, and the product documentation also includes component sections for items like the surge protection box and MDU. Because the 1200 kVA model does not match the "two power cabinets" description, the combined statement (covering both 1200 kVA and 1600 kVA) is false, even though the "two power cabinets + one bypass cabinet" part is valid for 1600 kVA.
NEW QUESTION # 28
The software installation package does not need to be downloaded for the preinstalled server.
Answer: B
Explanation:
In Huawei delivery scenarios, a preinstalled server means the target software (for example, the NetEco platform and its required runtime components) has already been deployed and integrated on the server image before it is handed over for on-site commissioning. Because the installation media has already been applied, the on-site engineer's work typically shifts from "software installation" to "environment verification and initialization," such as confirming OS/service status, checking resource allocation, validating database and middleware health, verifying network planning (IP, gateway, DNS/NTP as required), and completing application-level initialization (site creation, user/role configuration, northbound interface settings, and device/model import if needed). In this case, downloading the full installation package is not a mandatory step for commissioning, because the package is mainly required when performing a fresh installation or reinstall/upgrade. However, standard practice is still to prepare supporting materials (patches, licenses, and compatibility documents) and ensure the preinstalled version matches the project baseline before acceptance.
NEW QUESTION # 29
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