NO.72 The following is for high frequency ups The correct description of the rectifier components is.

NO.73 The valve-controlled sealed lead-acid battery safety valve has ____________ Function.

NO.74 The data center computer room monitoring system mainly monitors power systems, environmental systems, and fire fighting systems.

NO.75 When the sunroof actuator senses a smoke alarm, it cannot control the turning sunroof to open automatically.

NO.76 Common device communication methods are RS232,RS485,FE Wait.

NO.77 The core components of the refrigeration system mainly include ____________ .

NO.78 It can be implemented in the alarm management function of the dynamic environment monitoring system
____________ .

NO.79 There are three different classifications of grounding forms in low-voltage power distribution systems,
____________ . The second capital letter represents ____________ .

NO.80 Huawei Monitoring System NETECO Support hierarchical network management function.

NO.81 During the construction process, the operation with debris splashing should be used ____________ .

NO.82 ____________ Not part of Huawei’s monitoring system NETECO Provide monitoring functions.

NO.83 ____________ The main function is electric energy distribution, which distributes the front-end electric energy to various types of electrical equipment according to requirements, standards and specifications, such as ups, Air conditioning, lighting system, etc.

NO.84 The throttling devices used by Huawei’s air-cooled precision air conditioners are ____________ .

NO.85 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.

NO.86 Huawei Monitoring System Neteco Can only access support SNMP Protocol equipment.

NO.87 Use POE When interface, it has two functions of communication and power supply.

NO.88 The user can upgrade the device version in the ____________ interface.

NO.89 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. ____________

NO.90 The use of water fire and foam fire extinguishing systems in the data center will not cause damage to communication equipment.

NO.91 The following air conditioning, which is comfort air conditioning?

NO.92 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.

NO.93 The leakage protector is mainly divided into electronic type and electromagnetic type according to the action mode.

NO.94 The gas fire extinguishing system consists of ____________ .