Practice Free H12-411_V2.0-ENU Exam Online Questions
The general connection method of lead-acid batteries is to connect them in series first and then in parallel.
- A . True
- B . False
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
The function of the wind system is to reasonably organize the flow of indoor air so that the temperature, humidity and cleanliness of the air in the indoor working area can better meet the process requirements and human comfort requirements.
- A . True
- B . False
Protective grounding: Grounding refers to a direct connection with the earth, a point on the live part of an electrical device or electrical line is connected to the earth, and an artificial connection between a point on the non-live part of an electrical device or other device when it is normal and the earth.
- A . True
- B . False
Lithium has very active chemical properties and is very easy to burn. By managing the charging current through BMS, the internal temperature of the battery can be prevented from being too high.
- A . True
- B . False
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 device.
- C . When the battery temperature is too low, increase the battery charging voltage.
- D . When the mains power is normal and the real-time capacity of the lead-acid battery is lower than the set value, the battery switches from the equalizing charging mode to the floating charging mode.
What are the advantages of UPS5000-A over NXP, 9395 and Galaxy7000? (Multiple choice)
- A . Input voltage range
- B . Efficiency
- C . Area
Common working modes of UPS are ()
What is the line input method supported by UPS5000-A-400/500K?
- A . Downstream line
- B . Upper line
- C . Up and down wiring compatible
The three-phase unbalanced current in the TN-S low-voltage distribution system causes the protective line PS to generate a voltage to the ground.
- A . True
- B . False