H12-411_V2.0 Exam Questions

UPS5000-E battery adopts a neutral line-free design, which makes it easy to reuse old batteries when replacing tower computers.

The charging modes of VRLA batteries can be divided into equalizing charging and floating charging. Equalizing charging can not only realize fast charging of the battery, but also...

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...

Common equipment communication methods include RS232, RS485, FE, etc.

From the perspective of battery structure, lithium-ion batteries are more environmentally friendly and safer than lead-acid batteries.

Personnel working at heights must be equipped with necessary safety belts that meet safety requirements and use them correctly and reasonably according to the regulations and be su...

The low temperature component can improve the continuous low pressure caused by low temperature startup, so that the air conditioner can start normally.

In the low-voltage power distribution system, the function of the PE line is to provide a loop path for the fault current when a power supply system failure occurs.

The alarms of the dynamic environment monitoring system usually have different levels.

The dynamic environment monitoring system focuses on the infrastructure management of the data center and supports the monitoring of the power supply equipment, refrigeration equip...

The dynamic environment monitoring system can be deployed in medium and large modular data centers, small modular data centers, container data centers, etc.

The dynamic environment monitoring system supports alarm management functions.

The dynamic environment monitoring system has only a two-level architecture.

In the dynamic environment monitoring system, viewing the detailed alarm information can help locate the alarm source.

The English abbreviation of valve-regulated lead-acid battery is VRLA.

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...

High sensible heat ratio is the only difference between precision air conditioners and civilian air conditioners.

The administrator cannot limit other users' login time and login IP address through Huawei monitoring system.

The basic principle of infrared heaters is that infrared rays heat water to boiling, thereby generating steam.

Huawei's NETECO monitoring system does not support remote door opening.

Huawei's monitoring system NetEco does not support monitoring of third-party devices.

Huawei's monitoring system NetEco supports the concept of user groups and implements role- based user group management. A user group is a set of user levels with the same operating...

Huawei's monitoring system Neteco can only access devices that support the SNMP protocol. ()

Huawei precision air conditioners have power overvoltage, undervoltage alarm and fault diagnosis alarm recording functions, automatic protection, automatic recovery, automatic rest...

The function of Huawei's chilled water air conditioner frame power supply is to provide stable power to the fan.

When AC power equipment is introduced using a three-phase four-wire system, in addition to grounding near the power transformer, the power equipment and the machine room should be...

The condensed water of the air conditioner is formed by condensation after the air cooler cools down.

The energy efficiency ratio of air conditioning is the ratio of effective input power to cooling capacity, and its value is expressed in W/W.

Air supply from the air conditioner is generally suitable for computer rooms with lower power density.

Leakage protectors are mainly divided into electronic and electromagnetic types according to their operating mode.

A circuit has two isolating switches and a molded case circuit breaker combination to control the on and off of the circuit. Therefore, when power is supplied, first close the isol...

Gas fire fighting system refers to a fire fighting system that uses gas (including steam and aerosol) as the fire fighting medium.

The function of the lead-acid battery is to hold electrolyte, plates, separators, etc.

The fuse can protect personal safety when the equipment leaks electricity.

When using the POE interface, it has two functions: passing and power supply.

The data center management system NetEcoV8 version can support the access of up to 1 million measurement points on a single server.

The main objects monitored by the data center computer room monitoring system include power system, environmental system, fire protection system, etc.

The refrigerant of water-cooled/ethylene glycol air conditioners has been filled before leaving the factory, and on-site installation is convenient and quick.

Water-cooled air conditioning and chilled water air conditioning are the same refrigeration system.

Water fire fighting systems are generally used for fire fighting in data centers.

By configuring different external units and components, Huawei's air-cooled precision air conditioners can adapt to the following ambient temperatures: outdoor -40~ +55, humidity:...

The rated ultimate short-circuit breaking capacity LCU of the same MCB circuit breaker is generally smaller than the rated operating short-circuit breaking capacity LCS.

The compressor is the core of the refrigeration cycle and is the power device for the refrigerant to circulate in the system, compressing the low-temperature and low-pressure steam...

In the hierarchical deployment of the data center monitoring system, the secondary architecture consists of the monitoring center and the regional monitoring station.

The use of water fire fighting and foam fire fighting systems in data centers will not cause damage to communication equipment.

Under the same load conditions, the backup time of UPS is mainly determined by the battery capacity and the number of batteries. The larger the battery capacity, the longer the bac...

During the use of batteries, the sun can shine directly on the batteries.

In the main circuit inverter mode, when the UPS is overloaded, it will switch from the main circuit inverter to the battery inverter mode.

The principle of the evaporator is to convert the refrigerant from liquid to gas, taking away the heat of the refrigerated object and achieving refrigeration.

The evaporator is a low-temperature component in the air conditioner and should be protected from frostbite during operation.