NO.98 When the mains input range is voltage:150-260VAC,frequency:45-60Hz,the following ups Working range
____________ It can work normally in the inverter state of the main circuit.

NO.99 High sensible heat ratio is the only difference between precision air conditioners and civil air conditioners.

NO.100 The following are not part of the agreement ____________ .

NO.101 The function of Huawei’s chilled water air conditioner plug-in frame power supply is to provide a stable power supply for the fans.

NO.102 The function of the following ____________ components is to help return oil.

NO.103 The throttling devices used by Huawei’s air-cooled precision air conditioners are ____________ .

NO.104 MCB Circuit breakers can be divided into different tripping characteristics B, C, D, Z, K Level, for IT For load, you should use ____________ class Tripping characteristics.

NO.105 Huawei Monitoring System NETECO Supported functions are ____________ .

NO.106 The dynamic environment monitoring system can be deployed in medium and large modular data centers, small modular data centers, container data centers, etc.

NO.107 UPS Common working modes are ____________ .

NO.108 ____________ Support creating report tasks according to report templates.

NO.109 International Electrotechnical Commission ____________. The specified contact voltage limit is
____________V, And stipulate 25V. The following does not need to consider the prevention Safety measures to prevent electric shock.

NO.110 For unsaturated air, dry bulb temperature, wet bulb temperature, A The relationship between point temperature is ____________ .

NO.111 The condensate of the air conditioner is formed by condensation after the air warning surface cooler cools down.

NO.112 The components of Huawei’s dynamic environment monitoring system are ____________ .

NO.113 The following ____________ are not harmful effects of electric current on the human body.

NO.114 The increase of cabinet power density will lead to the emergence of local hot spots in the computer room, and row-level air conditioners can solve local problems. The hot spot is too high.

NO.115 At the end of the discharge of lead-acid batteries, the voltage drops, and the positive and negative active materials are converted into ____________ .

NO.116 During the construction process, work in contact with sharp instruments and use ____________ .

NO.117 When the battery is in use, sunlight can directly shine on the battery.

NO.118 Protective grounding: Grounding refers to the direct connection with the earth, and a certain point of the live part of an electrical device or electrical circuit is connected to a large point. When the electrical device or other device is normal, a certain point of the uncharged part is artificially connected to the earth.

NO.119 The following ____________ Circuit breakers are usually used ITLow-voltage circuit breaker for the load.

NO.120 Use POE When interface, it has two functions of communication and power supply.

NO.121 During the construction process, carry out low-voltage live work ____________, should be used
____________ .