QUESTION 21
Which battery parameter can not be detected by the iBattery?
A. Voltage
B. Current
C. Pole temperature
D. Electrolyte concentration
Correct Answer: D
QUESTION 22
The power cabinet and bypass cabinet of the UPS5000-E-500K can be separated. If the door width of the power distribution room does not meet requirements, users can separate the power cabinet and bypass cabinet before moving them.
A. TRUE
B. FALSE
Correct Answer: A
QUESTION 23
Three UPs5000-E-400Ks form a 2+1 parallel system. Which of the following statements about the parallel system are true?
A. The parallel system capacity displayed on the LCD is 1200 kVA.
B. If the load is 420 kW, each of two UPSs carries 210 kW load, and the other one is standby and does not carry load.
C. The networking mode is set to one-to-multiple for one UPS, and set to one-to-one for the other two UPSs.
D. If the load is 420 kW, each of the three UPSs carries 140 kW load.
Correct Answer: ABCD
QUESTION 24
A UPS5000-E-400K is configured with four VRLA battery strings. Each battery string is configured with a branch switch, and a general switch is configured between battery strings and the UPs. Which of the following statements about the switch operations are true?
A. When turning on switches, turn on the branch switch of each battery string first, and then turn on the general switch.
B. When turning on switches, turn on the general switch first, and then turn on the branch switch of each battery string.
C. When disconnecting batteries from the UPS, turn off the general switch and then the branch switch of each battery string.
D. When disconnecting batteries from the UPS, turn off the branch switch of each battery string, and then the general switch.
Correct Answer: A
QUESTION 25
If the battery charge current limit coefficient of the UPS5000-E is set to 0.1C10, which of the following statements about this parameter is true?
A. The battery charge current is always 0.1C10.
B. The battery float charge current is 0.1C10.
C. The maximum battery charge current is 0.1C10.
D. The minimum battery charge current is 0.1C10.
Correct Answer: C
QUESTION 26
Which of the following parameters can be displayed on the LCD of the PDU8000 modular precision PDF?
A. Active power of each branch
B. Circuit breaker status of each branch
C. Current of each branch
D. Temperature of each branch
Correct Answer: ABC
QUESTION 27
In the water-side free cooling solution, cold water cannot be transported directly from the cooling tower to chilled water air conditioner.
A. TRUE
B. FALSE
Correct Answer: A
QUESTION 28
Which of the following are components of the fan wall cooling system?
A. Control unit
B. Air inlet unit
C. Humidification unit
D. Air exhaust unit
Correct Answer: AC
QUESTION 29
Which of the following may cause the buzzer to buzz on the LCD of a Huawei air cooled precision air conditioner?
A. There is a warning alarm.
B. There is an unacknowledged critical alarm.
C. The equipment runs properly.
D. There is an unacknowledged major alarm.
Correct Answer: BD
QUESTION 30
Which of the following statements about the oil trap of Huawei air-cooled precision air conditioner is false?
A. When the outdoor unit is higher than the indoor unit, install an oil trap every 5-6 m in the vertical direction of the liquid pipe.
B. When the system is running, the refrigerant flow rate at the oil trap increases. The high flow rate helps take away the refrigerant oil stored here.
C. When the indoor unit is higher than the outdoor unit, no oil trap is required.
D. The oil trap prevents the refrigerant oil from accumulating at the lowest end of the pipe.
Correct Answer: B
QUESTION 31
NetCol8000-A100 is dual system air conditioner, one indoor unit has two compressors.
A. TRUE
B. FALSE
Correct Answer: A
QUESTION 32
Which of the following is the default control mode for EC fans of Huawei chilled water precision air conditioners?
A. Temperature difference control
B. Differential pressure control
C. Supply air temperature control
D. Return air temperature control
Correct Answer: D
QUESTION 33
What is the maximum number of NetCol5000-C supported by one NetCol520?
A. 12
B. 8
C. 6
D. 10
Correct Answer: A
QUESTION 34
As the altitude increases, the air density decreases, and the heat exchange capability of the air in a unit volume decreases. In this case, NetCol8000-E220 works
with derating.
A. TRUE
B. FALSE
Correct Answer: A
QUESTION 35
When welding the refrigerant pipes, blow a little nitrogen into the pipes to prevent the pipes from being oxidized .
A. TRUE
B. FALSE
Correct Answer: A
QUESTION 36
After all historical alarms of the NetCol5000-A are deleted, the deletion operation is not logged.
A. TRUE
B. FALSE
Correct Answer: B
QUESTION 37
During nitrogen injecting, a pressure relief valve must be installed on the nitrogen cylinder
A. TRUE
B. FALSE
Correct Answer: A
QUESTION 38
The temperature and humidity around the air supply vent of a precision air conditioner need to be controlled in the cold air containment. Which of the following temperature and humidity control modes should be used?
A. Return air
B. Hot aisle
C. Supply air
D. Cold aisle
Correct Answer: C
QUESTION 39
Which switches need to be turned on when the NetCol5000-A is powered on?
A. outdoor unit switch
B. Compressor switch
C. Upstream air conditioner power switch
D. Fan switch
Correct Answer: ABCD
QUESTION 40
Commissioning NetCol5000-C drainage devices, after lifting the high float for 5 seconds, two water pumps start working, and the drain abnormal alarm is generated.
A. TRUE
B. FALSE
Correct Answer: A