H12-411_V2.0 Exam Questions

The principle of the condenser is to cool the high-temperature and high-pressure gaseous refrigerant into liquid, thereby achieving heat transfer and release.

Compared with the horizontal air supply of row-level air conditioners, upward air supply is more suitable for data centers with lower single cabinet power density.

When Huawei's sunroof actuator senses a smoke alarm, it cannot control the flip sunroof to open automatically.

When the equipment adopts protective grounding, fuses and switches should be installed in the grounding wire loop.

The actual input voltage of the air conditioner is 370V, and the rated input voltage of the air conditioner is 380V. The project requires that the allowable voltage difference of t...

After the current of the leakage current protector exceeds the specified value for a period of time, the heat generated by itself causes the fuse to melt, thereby disconnecting the...

Secondary equipment is low-voltage electrical equipment used to monitor, measure and protect primary equipment in the power system.

The user management function supports grouping users and configuring corresponding operation permissions for different user groups.

Pre-cooling of the fresh air system can reduce air conditioning energy consumption.

Which of the following air conditioners is a comfort type air conditioner?

For unsaturated air, the relationship between dry bulb temperature, wet bulb temperature and point A temperature is ()

UPS is also known as AC uninterruptible power supply system. For online UPS, when the AC input is normal, the system is powered by ().

In Huawei's dynamic environment monitoring system, the device at the data acquisition layer that can pass the information of the underlying components () to the monitoring software...

() can work normally in the main circuit inverter state.

Which of the following four components does not belong to the air conditioner?

() is a correct statement 6 fixed valve-regulated sealed lead-acid battery cells are connected in series, with a rated capacity of 150AH.

The main function of () is to distribute electric energy, which distributes the previous-level electric energy to various types of electrical equipment according to requirements, s...

() is the unit of UPS rated capacity.

In the dynamic environment monitoring system, users query the alarm information of refrigeration equipment through the () function.

() does not belong to the characteristics of direct - expansion air-cooled air conditioners.

The fire extinguishing agent mainly used in the data center fire protection system is ()

() is not a harmful effect of electric current on the human body.

() circuit breakers are typically low-voltage circuit breakers used for IT loads.

() components can improve the heat transfer capacity of the heat exchanger.

Users can upgrade the device version in the () interface.

Common working modes of UPS are ()

For power supply and distribution equipment that only has Modbus protocol, it can be connected to the dynamic environment monitoring system through ().

The closer the PUE value is to (), the better the energy efficiency of the data center is.

The setting value of the C-level trip of the MCB circuit breaker is between (), and it is used in IT load situations.

The refrigerant used by Huawei precision air conditioners is ()

During the construction process, when working with sharp tools, use ()

() can be used as a side air outlet or as a bottom air outlet.

() does not belong to the monitoring functions provided by Huawei's monitoring system NETECO.

() can complete the conversion from DC to AC.

The () function of the dynamic environment monitoring system can display the real-time status of the equipment.

The parameter that can reflect the energy efficiency and energy efficiency of the data center is ()

The capacity of a UPS is 200KVA and its output power factor is 0.9, so it can drive a maximum of () loads.

() is used to ensure that the fire extinguishing agent is sprayed out in a specific jet form, causing the fire extinguishing agent to vaporize rapidly and reach a fire extinguishin...

The northbound interface of Huawei monitoring system NETECO can be connected to ()

In the alarm management function of the dynamic environment monitoring system, it can be realized that ()

Under () circumstances, UPS will operate in static bypass mode.

In the battery structure, the () component plays the role of removing excess gas.

At the end of the discharge of a lead-acid battery, the voltage drops and the positive and negative active materials are converted into ()

The communication interface with the fastest transmission rate is ()

The International Electrotechnical Commission (IEC) stipulates that the contact voltage limit is ()V, and stipulates that there is no need to consider safety measures to prevent el...

The type of compressor used by Huawei air-cooled precision air conditioner is ()

During construction, when there is debris splashing, you should use ()

() can check whether the refrigerant contains water.

Huawei's chilled water air conditioner relies on () to regulate water flow.

According to the different electrolyte storage methods in the battery, it can be divided into () and ().