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| Section | Objectives |
|---|---|
| Topic 1: Power Supply and Distribution System | - Battery Systems and Reliability - Power Supply and Distribution System Architecture - Power Distribution Unit (PDU) and Power Distribution Architecture - UPS System Principles and Configuration |
| Topic 2: Modular Data Center | - Design, Delivery, and Installation - Huawei FusionModule Series - Modular Data Center Concepts and Benefits |
| Topic 3: Data Center Infrastructure Management (DCIM) | - DCIM System Architecture - Energy Efficiency Management - Monitoring and Alarm Management |
| Topic 4: Data Center Facility Overview | - Typical Data Center Scenarios and Requirements - Data Center Facility Concepts and Development Trends - Huawei Data Center Facility Solution Portfolio |
| Topic 5: Cooling System | - Cooling System Architecture and Design - In-Row and In-Rack Cooling Units - Air-Cooled and Water-Cooled Chillers - Free Cooling Technologies |
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88. Frage
When tightening the screws (M16x50 mm) for the output power cables of lithium battery cabinets, what torque should be used to tighten and verify the screws?
Antwort: D
Begründung:
For Huawei SmartLi lithium battery cabinets, the output power cable termination uses high-current DC conductors, so the mechanical fastening torque is strictly specified to ensure both safety and long-term reliability. ForM16x50 mm screwsused on the+/N/# output cable terminals, the specified tightening
/verification torque is120 N m. This torque requirement is defined to achieve the correct clamping force between the DT terminal lug and the cabinet busbar/terminal surface. If the torque is below the requirement, contact resistance increases, which can lead to abnormal heating during charge/discharge, voltage drop, alarm events, and accelerated oxidation at the joint. If the torque is excessive, it can damage threads, deform the lug or busbar contact area, and introduce hidden mechanical stress that may loosen over thermal cycles. During commissioning and routine maintenance, technicians use a calibrated torque wrench to tighten and then re- verify each connection to the specified value to prevent hotspots and ensure stable operation under peak current conditions.
89. Frage
Which of the following statements is false about how to start an electric heater?
Antwort: A
Begründung:
Huawei precision cooling logic separates heater enablement into distinct control strategies to avoid unnecessary heating and to keep humidity control stable. InLow temperature heating, the heater is governed purely by the room temperature control demand: if temperature is below the heating threshold (or below setpoint with heating conditions met), the heater can start regardless of whether dehumidification is enabled, which matches statement D. InDehumidification heating, the heater is not a general low-temperature heater; it is an auxiliary function used to prevent overcooling during dehumidification and to maintain temperature while the unit dehumidifies. Therefore, the heater in this mode is permitted to start only when thedehumidification function is activeand temperature conditions require compensation, which matches statement B. Statement C is false because it incorrectly claims thatanyof the three selections will start heating automatically whenever room temperature is low; that is not true for "Dehumidification heating" unless dehumidification is actually enabled and running.
90. Frage
Which of the following is NOT typically a subsystem integrated within a Huawei smart modular data center (e.g., FusionModule series)?
Antwort: B
Begründung:
FusionModule solutions integrate power, cooling, monitoring, and often fire protection as facility subsystems. WAN edge routing is an IT/network function, not part of the facility module's scope.
91. Frage
After the battery module is installed, the torque and insulation should be checked according to the specified requirements.
Antwort: A
Begründung:
This statement is true because post-installation verification is a mandatory acceptance step for battery systems in data centers. After a battery module is installed, torque verification ensures that all power terminals, interconnect bars, and grounding points meet the specified tightening requirements. If torque is too low, contact resistance increases, which can cause abnormal heating, voltage drop, nuisance alarms, and even connector damage during high current charge/discharge. If torque is too high, threads, lugs, or busbars can be damaged, creating hidden reliability risks. Insulation testing confirms that the battery circuit has no unintended leakage paths to chassis or ground and that cable routing, connector seating, and protective covers are correct. This is especially important for lithium battery cabinets where high DC voltage and large fault current capability demand strict electrical isolation. Performing torque and insulation checks after installation reduces early-life faults, improves safety, and ensures the cabinet can pass commissioning tests and enter stable service under UPS charge/discharge control.
92. Frage
Which of the following models is a Huawei in-room chilled water horizontal air supply product?
Antwort: C
Begründung:
Huawei room-level air conditioning products are commonly identified by the series name plus a model suffix that indicates the cooling medium and airflow form factor. Anin-room chilled waterunit uses a chilled-water coil as the primary heat-exchange component and relies on the building's chilled-water system (chiller/plant) rather than an onboard refrigeration compressor for cooling generation. "Horizontal air supply" describes the discharge direction: the unit supplies conditioned air laterally into the room or into a specific airflow organization (such as cold-aisle delivery), supporting predictable airflow paths and stable return air conditions. Within the provided options,FusionCol5000-A050His the model that matches both identifiers: it belongs to Huawei's room cooling product line and the model code indicates an in-room configuration withchilled-watercapability andhorizontalair supply orientation. The other options belong to different series or represent configurations typically associated with other deployment forms (such as different placement, airflow direction, or system architecture). Therefore, the correct selection isFusionCol5000-A050H.
93. Frage
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