dumpspedia logo
In the air-conditioning system, the function of the ____________ is to use water cooling or air cooling to cool the high-temperature and high-pressure gas discharged from the compressor and release heat to the outside world.
The function of Huawei's chilled water air conditioner plug-in frame power supply is to provide a stable power supply for the fans.
During the construction process, the operation with debris splashing should be used ____________ .
The principle of the evaporator is to convert the refrigerant from liquid to gas, take away the heat of the refrigerated object, and realize refrigeration.
At a certain atmospheric pressure and water vapor content, the air is cooled down. When the air reaches saturation, it will continue to cool down. The temperature at the time of condensation is ____________ .
ACB The actual work of the circuit breaker can reach several thousand amperes, and at the same time, it requires high segmentation capability and thermal stability. ____________
In the data center power supply and distribution system, if a power outage occurs, it is generally caused by Complete the standby switch between mains and mains or mains and diesel generators.
The parameters that can reflect the energy efficiency and energy use efficiency of the data center are ____________ .
Through the query ____________, the user can understand the operation of the device.
When the sunroof actuator senses a smoke alarm, it cannot control the turning sunroof to open automatically.
When the AC power equipment is introduced in the three-phase four-wire system, in addition to the grounding of the near end of the power transformer, the near end of the electrical equipment and the equipment room should be grounded repeatedly on the neutral line.
During the battery installation process, the maintenance channel of the high-voltage battery pack used should be insulated.
For unsaturated air, dry bulb temperature, wet bulb temperature, A The relationship between point temperature is ____________ .
According to the degree of equipment concentration, the air conditioning system can be divided into ____________ .
When the battery electrolyte leaks, ____________ treatment is more appropriate.
There are generally two types of variable air volume ventilated floors, one is through an adjustable air valve, and the other is a dedicated ventilated floor plus adjustable fans.
PUE The closer the value ____________, indicating that the energy efficiency status of the data center is good.
Lay anti-static floor, wear anti-static shoes and socks to prevent it from forming ____________ .
The following is for high frequency ups The correct description of the rectifier components is.
The air-conditioning energy efficiency ratio is the ratio of the effective input power to the cooling capacity, and its value is W/W Express.
The following ____________ air supply methods mainly use process air conditioners that have a large amount of waste heat to be taken away from the lower working area.
If ups The capacity is 20KVA, Then in normal work,ups The front-end input capacity may be ____________ .
Dual power switch ATS According to different switch types, it can be divided into ____________ .
High sensible heat ratio is the only difference between precision air conditioners and civil air conditioners.
The humidifier used in Huawei's row-level precision air conditioner is an infrared humidifier.
Data center room PUE The smaller the value, the greater the power consumed by the supporting infrastructure of the data center such as cooling and power supply.
UPS Also known as AC uninterrupted power supply system, for online upsWhen the AC input is normal, the ____________ will supply power to the system.
In the main road mode, when ups The front-end voltage is at 220V±10%When fluctuating,ups The output voltage will also have Larger fluctuations.
In Huawei's dynamic environment monitoring system, it is at the data collection layer and can integrate the underlying components ____________ . The equipment through which information is transmitted to the monitoring software is ____________ .
For valve-regulated lead-acid batteries, the function of the safety valve is ____________ .
The condensate of the air conditioner is formed by condensation after the air warning surface cooler cools down.
The following ____________ is not the basic function of low-voltage circuit breakers.
There are three different classifications of grounding forms in low-voltage power distribution systems ____________, where the first capital letter represents ____________ .
In the low-voltage power distribution system,PE The function of the line is to provide a path for the fault current when the power supply system fails.
The valve-controlled sealed lead-acid battery safety valve has ____________ Function.
During the construction process, if there is an object falling or hitting, it should be used ____________ .
In the dynamic environment monitoring system, the user queries the alarm information of the refrigeration equipment through the ____________ function.
In the air conditioning system, the function of the oil and gas separator is to separate the lubricating oil from the compressor exhaust and return the separated lubricating oil to the compressor.
UPS The front-end input can be two mains, one main and one standby, or one mains and one diesel engine input.
Huawei Monitoring System NetEco Cannot provide to third-party network management system SNMP Formal interface.
During the construction process, work in contact with sharp instruments and use ____________ .
The surface cooler controls the indoor temperature and humidity through the heat exchange between the refrigerant and the indoor air.
TESTED 21 Nov 2024