Huawei H12-421_V2.0-ENU 問題練習

Question No : 1
The rated voltage of a single cell in a VRLA battery is ().

• A.12V
• B.6V
• C.2V
• D.1V

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Question No : 2
During the use of the battery pack, the appearance is normal, but there is no current when charging, the voltage drops to 0 at the moment of discharge, and it cannot discharge. Which of the following may have occurred?

• A.Short circuit in the battery pack
• B.Sulfation
• C.Lagging battery
• D.Battery leakage

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Question No : 3
The ECC800 is equipped with a SIM card. Where should the SIM card be installed?

• A.ECC800 power module slot
• B.Left slot of the ECC800 main control module
• C.Below the ECC800 antenna
• D.USB port

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Question No : 4
The principle of () humidifier is that a high-infrared lamp causes the water surface to release water vapor, which then diffuses into the airflow that needs to be humidified.

• A.Electrodes
• B.Humidity
• C.High-pressure spray
• D.Infrared

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Question No : 5
In ECO mode, when the input is stable, the UPS operates in () state.

• A.Mains inverter
• B.Bypass
• C.Battery
• D.Maintenance bypass

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Question No : 6
When a fire occurs inside the box, () is used to activate the gas fire extinguishing device on site.

• A.Emergency stop button/manual deflation button
• B.Fire Cylinders
• C.Pressure switch
• D.Solenoid valve

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Question No : 7
The function of the SW button on the ECC800 is ().

• A.Restore the default IP address
• B.Wireless Network Pairing
• C.Device software upgrade
• D.Eliminate the alarm

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Question No : 8
Which of the possible causes of the high-pressure exhaust gas alarm during startup and commissioning of the NETCOL5000-A air conditioner is incorrect?

• A.The outdoor fan cannot start
• B.Outdoor fan speed bottom
• C.Overfilling of cold plate
• D.The cold plate is not filled enough

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Question No : 9
Which of the following options belongs to the natural cooling system?

• A.Direct ventilation air conditioning system
• B.Water-cooled air conditioning series
• C.Water-cooled chiller series
• D.Air-cooled vertical air conditioning system

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Question No : 10
Which of the following components can control the lighting in the equipment room and control the charging of the PAD?

• A.Access control actuator
• B.Actuator
• C.Cabinet Collector
• D.Smart ETH socket

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Question No : 11
Incorrect setting of the NETCOL5000-C temperature and humidity sensor dial may result in ().

• A.Water leaking from the bottom of the equipment
• B.The return air temperature or fan speed fluctuates greatly
• C.The drainage capacity of the equipment has decreased significantly
• D.The temperature and humidity sensor cannot detect temperature and humidity

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Question No : 12
For batteries that have been stored for 18 months or more and have not been charged during this period, what should be done with them?

• A.No treatment required, use as soon as possible
• B.Need to be supplemented and used as soon as possible
• C.Requires activation treatment, use as soon as possible
• D.Scrap

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Question No : 13
Users can modify the IP address of the ECC800 from the () menu on the ECC800 web interface.

• A.Micromodule Settings
• B.Video IP Settings
• C.Time Settings
• D.Monitoring module IP

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Question No : 14
The smart ETH socket supports a maximum of () cascade connections.

• A.8
• B.16
• C.32
• D.64

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Question No : 15
Damage to the NETCOL5000-C insulation foam may result in ().

• A.The fan noise is too loud
• B.The drainage capacity of the equipment has decreased significantly
• C.Condensation in pipes
• D.Fan stall

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