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| Section | Objectives |
|---|---|
| Power Systems | - UPS systems and backup power - Power distribution principles |
| Safety and Compliance | - Operational safety standards - Fire protection systems |
| Cooling Systems | - Air conditioning systems in data centers - Thermal management and airflow design |
| Facility Monitoring and Maintenance | - Fault detection and routine maintenance - Environmental monitoring systems |
| Data Center Infrastructure Fundamentals | - Data center architecture overview - IT equipment and facility integration basics |
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NEW QUESTION # 15
During routine maintenance of the lithium battery cabinet, which of the following procedure is true about replacing a faulty battery module?
Answer: A
Explanation:
The correct sequence prioritizeselectrical safety first, then mechanical disassembly. You mustconfirm the batteries are not discharging(Step 1) to avoid working under load. Next, the cabinet must be placed into a safe powered-down state byswitching off the battery circuit breaker and long-pressing the POWER ON/OFF button to power off the cabinet(Step 6). Only after the cabinet is safely powered down should you open up the working area byremoving the front covers of the faulty module and adjacent modules(Step 3). Then youturn off the ready switchon the battery management module (Step 2) to prevent the system from re-enabling the module unexpectedly during maintenance. After that, youloosen the securing bolts and pull out the battery management module about 10 cm(Step 5) to create operating space and ensure isolation for subsequent operations. With the cabinet safely stopped, you canremove the cables and copper barsconnected to the faulty module (Step 7), and finallyremove the baffle plate and pull out the faulty battery module(Step 4).
NEW QUESTION # 16
Which of the following can be used to start the inverter of the UPS5000-H?
Answer: B,C
Explanation:
For the Huawei UPS5000-H, inverter startup is executed through theUPS's own control interfaces, which provide the "Running Control / Inv. ON" operation with the required confirmations and permissions. TheUPS LCD (MDU touchscreen)supports inverter startup through menu operations such as selecting inverter start functions and confirming the action after authentication. TheUPS WebUIalso provides the same operational control path, where an operator logs in and issues theInv. ONcommand 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) andNetEco(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 aUPS running control operationperformed on the UPS's LCD or WebUI control plane to ensure proper authorization, safety checks, and command traceability.
NEW QUESTION # 17
What are the colors of indicators on the LCD panel of the MDU?
Answer: A,C,D
Explanation:
On Huawei UPS systems (such as the UPS5000 series), the MDU LCD panel includes status indicators designed to provide an immediate visual understanding of the UPS operating condition and alarm severity.
The indicator system usesthree standard colors:green,yellow, andred.Greenindicates the UPS is operating normally and the power supply path is healthy.Yellowis used to show abnormal conditions that require attention, such as warnings or non-critical alarms, where the UPS can typically continue supplying power but O&M personnel should inspect and handle the issue within the required timeframe.Redindicates serious or critical conditions, such as major faults or alarms that may threaten continuous power supply or require urgent action according to operating procedures. These three colors align with the common Huawei alarm severity presentation logic on the UPS display and help technicians quickly judge whether the situation is normal, warning-level, or critical-level without entering deeper menus.Orangeis not used as an MDU indicator color in this context.
NEW QUESTION # 18
The NetEco northbound interface does not support the SNMP protocol. Only WebService interfaces are supported.
Answer: A
Explanation:
In Huawei's data center facility management architecture, the northbound interface of NetEco is designed specifically to integrate with upper-layer systems such as enterprise NMS platforms, SOC/monitoring centers, and customer unified O&M systems. To meet common industry integration practices, NetEco northbound capabilities are not limited to only one interface type. In addition to WebService-style interfaces used for richer data exchange and structured integration, NetEco also supports SNMP-based northbound integration, which is widely used for alarm forwarding, basic status monitoring, and interoperability with standard network management tools. SNMP is particularly common in mixed-vendor environments because it enables a lightweight and standardized method to deliver key alarms and events to a customer's central monitoring platform without requiring deep application coupling. Therefore, the statement that
"only WebService interfaces are supported and SNMP is not supported" is incorrect: NetEco northbound integration supports SNMP along with other northbound interface methods depending on the integration scenario and customer requirements.
NEW QUESTION # 19
Which of the following interfaces is used to connect the controller and the main control module of the unit?
Answer: C
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 a low-voltage communication bus plus DC power, which is why the interface is identified as I2C/12V. The I2C portion 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). The 12 V portion 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 like DP and USB are 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/12V is the correct selection.
NEW QUESTION # 20
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