H12-421_V2.0-ENU 実際試験問題と解答 - 模擬練習 - 受験自信を増やす

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

A.12V
B.6V
C.2V
D.1V

正解:

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

正解:

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

正解:

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

正解:

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

正解:

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

正解:

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

正解:

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

正解:

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

正解:

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

正解:

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

正解:

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

正解:

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

正解:

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

A.8
B.16
C.32
D.64

正解:

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

正解:

Huawei H12-421_V2.0-ENU 問題練習