HCNP-DCF-BFDO H12-421-ENU Practice Test Engine: Try These 240 Exam Questions
Guaranteed Success in HCNP-DCF-BFDO H12-421-ENU Exam Dumps
NEW QUESTION 139
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
- B. 0.8
- C. 2.5
- D. 1
Answer: A
NEW QUESTION 140
When a fire occurs in the cabinet, what is used to activate the gas fire extinguishing device on site?
- A. Fire cylinders
- B. Pressure switch
- C. Emergency stop button / manual deflation button
- D. Solenoid valve
Answer: C
NEW QUESTION 141
Which of the following technology or scheme can effectively reduce the PUE? (Multiple choice)
- A. Increase battery capacity
- B. Precise air supply
- C. Efficient modular UPS
- D. Closed cold/hot passage
Answer: B,C,D
NEW QUESTION 142
For storage batteries that have been stored for 18 months or longer, the battery that has not been recharged should be processed ().
- A. No need to deal with, use as soon as possible
- B. Disposal
- C. Need to supplement the electricity treatment, use as soon as possible
- D. Need activation treatment, use as soon as possible
Answer: B
NEW QUESTION 143
In the process of using the battery, in order to reduce the deterioration of the voltage imbalance between the batteries, it is necessary to increase the charging voltage of the battery pack, and to activate and charge the battery to extend the battery life, which is called ().
- A. Floating charge
- B. Self-discharge
- C. Charging test
- D. Balanced charging
Answer: D
NEW QUESTION 144
If the UPS5000-E-400K is bypassed and the maintenance bypass is closed, both the main power module and the bypass module stop working.
- A. False
- B. True
Answer: A
NEW QUESTION 145
When the battery is discharged, the discharge voltage of a faulty battery drops rapidly, resulting in insufficient backup time for the entire battery. What should be done?
- A. Forced equalization, replacement of faulty battery
- B. No need to deal with
- C. scrapping the entire battery
- D. Performing a discharge
Answer: A
NEW QUESTION 146
If the UPS5000-E-400kVA is equipped with an IP21 component, the top outlet is not supported.
- A. False
- B. True
Answer: B
NEW QUESTION 147
UPS2000-G-(6-20kVA) battery discharge time is significantly lower than the standard time may be caused by what? (Multiple choice)
- A. The battery is not full
- B. Battery capacity reduction
- C. Increased load
- D. No mains input
Answer: A,B,C
NEW QUESTION 148
Which of the following is supported by the AI/DI port on the access control actuator?
- A. Fingerprint reader
- B. Electronic magnetic lock
- C. Open the button
- D. IC card reader
Answer: C
NEW QUESTION 149
What are the access control type of the micro module? (Multiple Choice)
- A. Password swipe access control machine
- B. Fingerprint password swipe access control machine
- C. Face recognition access control
- D. Fingerprint swipe access control machine
Answer: A,B,D
NEW QUESTION 150
UPS2000-G-(6-20kVA) battery is not connected and does not affect the normal power supply of the system, but the UPS loses the backup power supply capability.
- A. False
- B. True
Answer: B
NEW QUESTION 151
When the differential pressure switch of the air filter of the indoor unit is closed, it indicates that the filter is too dusty and should be disposed of in time.
- A. False
- B. True
Answer: B
NEW QUESTION 152
When the NetCol5000-A air conditioner was commissioned, Which statement about the possible cause of the "exhaust high pressure alarm" was wrong?
- A. Excessive refrigerant charge
- B. Outdoor fan cannot start
- C. Too little refrigerant charge
- D. Outdoor unit fan speed is too low
Answer: C
NEW QUESTION 153
In the naming of UPS5000-E-120K-HASBS, the letter E stands for ().
- A. 208V voltage system
- B. Input switch type is ATS
- C. E series modular UPS
- D. Input switch type is MCCB
Answer: C
NEW QUESTION 154
After the air conditioner is commissioned, the indoor temperature is in a reasonable state, and the suction pressure is not lower than ( ).
- A. 0.7MPa
- B. 7MPa
- C. 5MPa
- D. 6Mpa
Answer: A
NEW QUESTION 155
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