If the status of the access which collected by the network management is always open, it can be checked by (). (Multiple choice)
A . Check if the door of access monitoring is closed
B . Check if the access control actuator and the door magnetic lock wiring are normal.
C . Check if the suction plate angle and tightness on the door are suitable
D . Check AC actuator wiring
Answer: ABC
After the NetCol5000-A25kW half-cabinet air-conditioning refrigerant pipeline is installed, do the nitrogen charge pressure maintaining, the nitrogen pressure is () Mpa.
A . 0.8
B . 2
C . 2.5
D . 3
Answer: D
When the status of UPS2000G battery is "NA", it may be ().
A . The battery is not connected
B . Battery low voltage
C . The battery is connected properly.
D . Battery N line is not connected
Answer: A
Which of the following factors affect battery life? (Multiple Choice)
A . Temperature
B . Number of cycles
C . Depth of discharge
D . Rated capacity
Answer: ABC
The following () parts can control the room lighting and control the Pad charging.
A . Access control actuator
B . Actuator
C . Cabinet collector
D . Smart ETH socket
Answer: B
The principle of the () humidifier is that the high-intensity infrared lamp causes the water surface to release water vapor and diffuse into the air stream that needs to be humidified.
A . Electrode
B . Wet film
C . High pressure fogging
D . Infrared
Answer: D
When the single machine is working, after the function of power-off of the ups2000-g machine is prohibited, the PL port has no output when overload or battery power is low.
A . True
B . False
Answer: B
The height of the ECC800 collector is () U.
A . 1
B . 2
C . 3
D . 4
Answer: A
The report functions of NetEco has a variety of presentation forms, including visualization of bar charts, pie charts, graphs, etc.
A . True
B . False
Answer: A
The UPS5000 option temperature and humidity sensor does not support cascading.
A . True
B . False
Answer: B