Important Huawei H20-923_V1.0 Exam Questions

Answer: B, C, D, E, F

Explanation:

Huawei's indirect evaporative cooling system is designed to use the outdoor air as a ''free'' cold source while keeping the data hall supply air isolated from outdoor contaminants and moisture. Its core is the heat exchanger, where heat from the indoor (return) air side is transferred to the outdoor working air side without mixing the two air streams. To enhance heat removal on the outdoor side, a spray system wets the evaporation media or spray section, and a water pump circulates water to maintain uniform wetting and stable evaporation performance. Fans drive airflow through the indoor and outdoor paths to ensure sufficient heat transfer and maintain the required air volume and pressure. Because outdoor air is involved on the working-air side, air filters are required to reduce dust and protect the heat exchanger and internal airflow channels, improving reliability and reducing maintenance. A compressor is not a main component of indirect evaporative cooling because the system primarily relies on evaporation and heat exchange rather than mechanical refrigeration.

Answer: B

Explanation:

In Huawei data center facility management, NetEco is the management software platform (server/application) used to centrally monitor and manage sites, while iBMC is the out-of-band hardware management interface used for server remote maintenance (such as power control, hardware health, BIOS settings, and remote console) on the specific server where iBMC exists. The iBMC port is not a service access interface for NetEco. NetEco's backend services are accessed through the server operating system network interfaces (management/service network) and corresponding application ports after the server is properly networked and configured. Even if NetEco is deployed on a Huawei server that has iBMC, iBMC only provides a channel to manage the server hardware and does not expose NetEco application access as an official commissioning/O&M path. Therefore, NetEco backend access should be planned via the site's management network (IP addressing, routing, security policy), not via iBMC.

Answer: B

Explanation:

Huawei data center facility design typically follows a layered fire protection concept: early detection, controlled alarm linkage, and suppression methods that protect equipment and ensure personnel safety. A smoke detection system (often combined with staged alarms) provides early warning so operators can verify events and initiate emergency procedures. For the IT white space, a clean-agent gas extinguishing system is preferred because it suppresses fire without leaving residue and significantly reduces the risk of corrosion or contamination compared with powder-based agents. The extinguishing system is normally integrated with linkage/interlock controls: audible/visual pre-discharge alarms, time delay, emergency abort, door access control logic, and HVAC shutdown or damper control to help maintain agent concentration. This coordinated mechanism reduces false discharge risk while preserving a reliable automatic response if a real fire develops. In contrast, relying only on manual extinguishers is too slow for rapid fire growth, and water sprinklers alone can cause substantial collateral damage to servers and power equipment.

Answer: A

Explanation:

Huawei's scenario-based data center facility portfolio is organized around clearly defined solution families that map to typical deployment scenarios and site sizes. FusionModule500 and FusionModule2000 are smart modular data center solutions designed for standardized, fast deployment in equipment rooms and enterprise edge/branch scenarios. They integrate key subsystems such as power supply and distribution, cooling, monitoring, and optional fire protection into a modular architecture that reduces footprint and accelerates on-site delivery. Likewise, FusionDC1000 is Huawei's prefabricated modular data center series, delivered as complete, factory-integrated modules that combine civil engineering elements with electromechanical infrastructure for rapid construction, predictable quality, and scalable expansion across different capacity tiers. In contrast, FusionDC800 is not used as a defined scenario-based solution name within Huawei's mainstream data center facility solution lineup (where ''FusionDC'' offerings are represented by the FusionDC1000 series and ''FusionModule'' offerings by numbered FusionModule solutions). Therefore, FusionDC800 is the option that does not match Huawei's scenario-based solution naming.

Answer: A

Explanation:

In UPS5000-H operation, normal mode means the load is supplied by the inverter, and the rectifier/charger maintains the DC link and batteries. The maintenance bypass switch (maintenance bypass breaker) is a mechanical isolation path intended to keep the load powered while the UPS is taken out of service for inspection or repair. Because it changes the power path and can create unsafe or unintended parallel paths if operated incorrectly, it is not permitted to simply close the maintenance bypass switch while the UPS is in normal mode. The correct O&M logic is to perform a controlled transfer first (typically transferring the load to static bypass with proper synchronization and confirmation that bypass power is healthy), and only then close the maintenance bypass switch so the UPS can be safely isolated. This prevents disturbance to the load, avoids synchronization/transfer hazards, and protects personnel from incorrect switching operations. Therefore, the statement is true in the sense of standard UPS5000-H operating procedure and safety interlock intent.