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| Section | Objectives |
|---|---|
| Data Center Infrastructure Management (DCIM) | - Energy Efficiency Management - DCIM System Architecture - Monitoring and Alarm Management |
| Cooling System | - In-Row and In-Rack Cooling Units - Cooling System Architecture and Design - Air-Cooled and Water-Cooled Chillers - Free Cooling Technologies |
| Power Supply and Distribution System | - Battery Systems and Reliability - Power Supply and Distribution System Architecture - UPS System Principles and Configuration - Power Distribution Unit (PDU) and Power Distribution Architecture |
| Data Center Facility Overview | - Typical Data Center Scenarios and Requirements - Huawei Data Center Facility Solution Portfolio - Data Center Facility Concepts and Development Trends |
| Modular Data Center | - Huawei FusionModule Series - Design, Delivery, and Installation - Modular Data Center Concepts and Benefits |
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NEW QUESTION # 84
Which of the following models is a Huawei in-room chilled water horizontal air supply product?
Answer: D
Explanation:
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.
NEW QUESTION # 85
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?
Answer: B
Explanation:
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. For M16x50 mm screws used on the +/N/- output cable terminals, the specified tightening/verification torque is 120 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.
NEW QUESTION # 86
In battery management for UPS systems, what is the primary purpose of periodic discharge testing?
Answer: A
Explanation:
Discharge testing validates that batteries can deliver their rated capacity under load, helping identify weak or failing cells proactively rather than discovering the deficiency during an actual power outage.
NEW QUESTION # 87
In a data center fire protection design, which approach best matches Huawei facility practice for protecting IT rooms while minimizing secondary damage to IT equipment?
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.
NEW QUESTION # 88
After the unit is powered on for the first time, it enters the compressor preheating state. To quickly perform power-on commissioning, you can manually shut down the compressor preheating.
Answer: B
Explanation:
Compressor preheating is a protection mechanism used during first power-on (and after long power-off periods) to improve compressor reliability before allowing refrigeration startup. The preheating function warms the compressor oil and reduces refrigerant migration and oil dilution, which otherwise can lead to liquid refrigerant in the compressor crankcase. If the compressor starts when oil is diluted or when liquid refrigerant is present, it increases the risk of abnormal noise, poor lubrication, high mechanical stress, and even liquid strike, which can damage the compressor and shorten service life. For data center cooling equipment, where continuous reliability is essential, the commissioning logic treats preheating as a required prerequisite for safe compressor operation. Therefore, O&M practice does not recommend bypassing or manually shutting down compressor preheating just to accelerate commissioning. The correct approach is to keep the unit energized and allow the preheating period to complete, then proceed with commissioning steps (fans, cooling system tests, alarms, and control verification) under proper protection conditions.
NEW QUESTION # 89
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