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| Section | Objectives |
|---|---|
| Cooling Systems | - Air conditioning systems in data centers - Thermal management and airflow design |
| Safety and Compliance | - Operational safety standards - Fire protection systems |
| Power Systems | - Power distribution principles - UPS systems and backup power |
| Data Center Infrastructure Fundamentals | - IT equipment and facility integration basics - Data center architecture overview |
| Facility Monitoring and Maintenance | - Fault detection and routine maintenance - Environmental monitoring systems |
>> H20-923_V1.0 Exam Materials <<
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NEW QUESTION # 88
In alarm management, the status can be identified by masking rules.
Answer: B,D
Explanation:
In Huawei alarm management,masking rulesare used to control how alarms are handled and displayed during specific conditions, such as planned maintenance, commissioning, device replacement, or known temporary abnormalities. When a masking rule is applied, the system can change how an alarm is classified so that O&M staff can distinguish between alarms that require immediate action and alarms that are expected or should be excluded from operational statistics. Two key statuses that masking rules can assign areMaintenanceandInvalid.Maintenanceindicates the alarm is generated during an approved maintenance activity (for example, power-off tests, sensor rewiring, cooling maintenance), so it is treated as expected and does not trigger normal escalation logic.Invalidindicates the alarm is not considered effective for operational follow-up-commonly used when a point is confirmed to be non-applicable, temporarily disabled, or its triggering condition is not meaningful to current operations. By contrast,ValidandStandardrepresent normal alarm handling states rather than outcomes specifically "identified by masking rules."
NEW QUESTION # 89
The FusionCol8000-A230 unit uses two systems. Each system uses three compressors connected in parallel and two EEVs.
Answer: B
Explanation:
For FusionCol8000-A230, the "two systems" part is correct: Huawei's quick guide explicitly states that theindoor and outdoor units consist of two independent cooling systems, which is the basis for redundancy and staged capacity control.
However, the rest of the statement ("each system uses three compressors connected in parallel and two EEVs") is not supported as a fixed, universal configuration in the installation/commissioning guide text that is available here. In Huawei smart cooling designs, compressor quantity and the number of electronic expansion valves (EEVs) aremodel- and configuration-dependentand are tied to how the refrigerant circuit is partitioned (for example, multiple compressor stages for capacity modulation, and one or more EEVs for different evaporator branches). Because the documentation we can directly verify confirmstwo independent systemsbut doesnotconfirm "three compressors per system" as an explicit requirement, the combined statement (two systems + specific compressor/EEV counts) is judgedfalse: one part is verified true, while the detailed component count cannot be confirmed as stated.
NEW QUESTION # 90
What does a red SPD (Surge Protective Device) indicator signify?
Answer: B
Explanation:
A red indicator means the internal protection component has degraded or disconnected after absorbing surge energy, and the SPD can no longer provide rated protection, leaving downstream loads exposed to surge risk. Immediate replacement following safe isolation procedures is required.
NEW QUESTION # 91
When the mains supply is stable, the UPS5000-H mainly works in which mode after ECO is configured?
Answer: B
Explanation:
After ECO mode is enabled on the UPS5000-H, the system's control objective changes from "always supply the load through the inverter" to "maximize efficiency while keeping protection mechanisms ready." When themains input is within the configured ECO acceptance window(voltage, frequency, THD, and other quality thresholds), the UPS supplies the critical load primarily through thestatic bypass path, which has lower conversion losses than continuous double-conversion. The inverter remains synchronized and on standby, so if the mains quality deteriorates or an abnormal condition is detected, the UPS canrapidly transferthe load back to inverter operation to maintain output stability. Battery mode is only used when the rectifier/bypass source is unavailable or out of range, and maintenance bypass is a manual service path used for isolation during maintenance, not for normal energy-saving operation. Therefore, with stable utility power and ECO configured, the UPS5000-H mainly operates instatic bypass mode.
NEW QUESTION # 92
Why does Huawei's O&M guidance emphasize completing startup password authentication before allowing any commissioning actions on a smart module?
Answer: B
Explanation:
Completing startup authentication (e.g., initial password setup) hardens the management plane before any commissioning or configuration actions are permitted, closing the security gap that could otherwise exist if default or incomplete credentials allowed unauthorized access during initial deployment.
NEW QUESTION # 93
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