Huawei H12-411_V2.0-ENU 問題練習

Question No : 1
What is the requirement for the duration of a single fault in a Class II power grid?

• A.≤8 hours
• B.≤4 hours
• C.≤0.5 h
• D.≤6 hours

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Question No : 2
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 is required and it can be sold directly for scrap recycling.
• D.When the battery leaks, do not touch it directly with your hands.

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Question No : 3
Which of the following is not one of the four major components of an air-cooled air conditioner?

• A.Compressor
• B.Evaporator
• C.Fan
• D.Condenser

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Question No : 4
Which of the following components can check whether the refrigerant contains moisture?

• A.Solenoid valve
• B.Sight glass
• C.Filter drier
• D.Oil sight glass

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Question No : 5
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 kVar
• B.40 kW, 60 kVar
• C.80 kW, 60 kVar
• D.100 kW, 80 kVar

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Question No : 6
Which of the following devices cannot be connected to the southbound interface of the dynamic environment monitoring system?

• A.Precision air conditioning
• B.UPS
• C.Access control equipment
• D.Superior network administrator

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Question No : 7
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 options

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Question No : 8
For valve-regulated lead-acid batteries, what are the functions of the safety valve?

• A.Exhaust excess gas and prevent air from entering
• B.No other options

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Question No : 9
Which of the following interfaces can both power the device and have communication functions?

• A.RJ45
• B.RJ12
• C.FE
• D.POE

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Question No : 10
Which of the following is the maximum communication distance of RS485 communication method?

• A.5 m
• B.100 m
• C.15 m
• D.1200 m

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Question No : 11
The active power is 80 kW, the power factor is 0.8, the system rated voltage is 380 V, 50 Hz, what is the current when the equipment is running at full power?

• A.122 A
• B.152 A
• C.210 A
• D.263 A

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Question No : 12
Which of the following descriptions about electrical equipment safety is wrong?

• A.The metal casing of electrical equipment must be grounded (zeroed) for protection
• B.Electrical equipment should be corrosion-resistant and moisture-proof
• C.When a fire occurs in electrical equipment, water can be used to extinguish the fire.
• D.It is strictly forbidden to use electrical equipment beyond the rated value

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Question No : 13
Which of the following belongs to air-cooled row-level air conditioner?

• A.NETCOL5000-A
• B.No other options

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Question No : 14
Which of the following does not belong to the components of chilled water air conditioner?

• A.Condensing agent
• B.None

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Question No : 15
Which of the following functions uses electronic tag technology to provide real-time statistics on the location of power distribution, air conditioning, refrigeration and other infrastructure?

• A.Operation and maintenance management
• B.Asset Management
• C.Report Management
• D.System Management

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