H12-411_V2.0-ENU exam

Regarding the description of the data center cooling system, which of the following is wrong?A . Among rack-level, row-level and room-level cooling, row-level cooling has the shortest airflow path.B . No other optionsView AnswerAnswer: A

Which of the following are the advantages of UPS 2N system?A . Power supply redundancy, the UPS system can be maintained without switching the load to maintenance bypass mode, and there is no single path failure pointB . The hardware configuration cost is low, and the UPS works under the...

Which of the following descriptions of Huawei's DC power supply are wrong?A . When the mains power is normal, the rectifier module not only supplies power to the load, but also provides floating charge current for the battery.B . When the mains power is off, the battery will power the...

The capacity of a UPS is 100 kVA, and its output power factor is 0.8. Which of the following is the maximum active power and reactive power that the UPS can output under rated conditions?A . 20 kW, 40 kVarB . 40 kW, 60 kVarC . 80 kW, 60 kVarD...

Which of the following parameters represent the pollution of UPS to the power grid?A . Output power factorB . Input current harmonicsC . Overload capacityD . EfficiencyView AnswerAnswer: B

Which of the following statements about UPS rectifiers is wrong?A . With boost functionB . can convert direct current into alternating currentC . Can reduce UPS pollution to the power gridD . Can realize power factor correctionView AnswerAnswer: B

Which of the following are the characteristics of water-cooled chilled water air conditioners?A . Cooling towers need to be installed, suitable for large and medium-sized data centersB . No other optionsView AnswerAnswer: A

If the capacity of UPS is 20KVA, then in normal operation, the UPS front-end input capacity may be ()A . 25KVAB . 30KVAC . 28KVAView AnswerAnswer: A

In the UPS system, which of the following is the most comprehensive description of the role of the inverter circuit?A . Convert the DC voltage or battery voltage after AC rectification into AC voltageB . No other optionsView AnswerAnswer: A

Which of the following statements about batteries is wrong?A . The battery room must be protected from overheating and thermal runaway.B . The battery expands because too much gas is released, causing the pressure to increase.C . When the battery reaches the end of its service life, no special treatment...