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WorksheetsHCIA-DATACENTER FACILITY
Total questions: 60
Worksheet time: 10hrs 0mins
1. The evaporator is a low-temperature component in the air-conditioning system. Therefore, prevent frostbite
during operation.
True
False
2. In the daily operation of an outdoor substation, the ambient humidity and dust are high. Engineers should configure common oil-immersed transformers for the substation.
False
True
3. In the hierarchical deployment of the data center surveillance system, the two-level architecture consists of the surveillance center and regional surveillance stations.
True
False
4. Building monitoring system is one of the eight subsystems of data center facility.
True
False
5. The charging modes of the VRLA battery include equalized charging and float charging. Equalized charging not only implements fast charging of the battery, but also balances features of the batteries in the battery pack.
False
True
6. Upflow air conditioners are applicable to equipment rooms with low power density.
False
True
7. In the data center equipment room, the lower the relative humidity of the air is, the better.
True
False
8. When a UPS works in ECO mode, the efficiency is lower than that in normal mode because the UPS works in the bypass.
True
False
9. A loop has two disconnectors and a MCCB to control the circuit, when supplying power, turn on the disconnector on the power supply side, then the disconnector on the load side, and finally the circuit breaker.
True
False
10. The water fire extinguishing system is usually used for fire extinguishing in data centers.
False
True
11. Modbus protocol types include Modbus-RTU, Modbus-ASC, and Modbus-TCP.
False
True
12. According to the structural materials of the battery, lithium-ion batteries are more environmentally friendly and safe than VRLA batteries.
True
False
13. MCBs are classified into B, C, D, Z, and K based on their trip characteristics. What level of tripping characteristic should be used for IT loads?
C. Level D
A. Level B
D. Level Z
B. Level C
14. Which of the following temperatures is most suitable for the UPS battery room in a data center?
A. 5°C
C. 25°C
D. 45°C
B. 15°C
15. What does LLVD mean?
A. Load low voltage disconnection
C. Low temperature voltage disconnection
D Mains undervoltage disconnection
B. Battery low voltage disconnection
16. Which of the following statements about the condenser is false?
C. Condensate water is generated when the indoor air passes through the condenser surface.
A. In normal cases, the inlet temperature of the condenser in an air-cooled direct expansion air conditioner is higher than the outdoor temperature.
D. Condensers of air-cooled direct expansion air conditioners are generally installed outdoors.
B. Condensers can be classified into air-cooled condensers and water-cooled condensers.
17. Which of the following is the active substance at the negitive pole of a VRLA battery?
A. PbSO4
C. Pb
B. PbO2
PbS2
18. Which is not the four major components of the refrigerating cycle?
D. Condenser
A. Compressor
B. Evaporator
C. Fan
19. Which of the following components is not belong to smoke prevention and exhaust system in the fire extinguishing system?
A. Pressurized air blower
D. Air sampling pipe
B. Smoke exhaust vent
C. Air duct
20. Which of the following statements about electrical equipment safety is false?
B. The electrical devices should be protected from corrosion and moisture.
A. The metal shells of electrical devices must be grounded (or connected to the neutral wire).
D. Do not use electrical devices over their rated values.
C. Electrical equipment can be put out with water when a fire occurs.
21. What is the maximum data transmission rate supported by FE?
A. 100 K
D. 100 M
B. 10 M
C. 1000 M
22. Which parameter indicates energy usage efficiency of a data center?
B. PUE
D. SPC
A. ROI
C. MITE
23. Which of the following ports can provide power and communication functions for devices?
B. RJ12
D. POE
A. RJ45
C.FE
24. Which of the following functions is used to measure the locations of infrastructures such as power distribution, air conditioners, and cooling in real time?
C. Report management
D. System management
A. O&M management
B. Asset management
25. In the cooling system of Huawei air-cooled precision air conditioners, which of the following components stores excessive refrigerant and ensures that the refrigerant entering the expansion valve is liquid?
A. Oil-gas separator
B. Evaporator
D. Compressor
C. Liquid storage tank
26. Which of the following statements about Huawei DC power supply are false?
D. When the mains is normal and the real-time capacity of the lead-acid battery is lower than the preset value, the battery switches from equalized charging mode to float charging mode.
A. When the mains is normal, the rectifiers supply power to loads and provide float current for batteries.
C. Increase the battery charging voltage when the battery temperature is too low.
B. When the mains fails, batteries supply power to the device.
27. Which of the following functions can display the entry and exit records of data center personnel?
C. Report management
D. Work order management
A. Configuration management
B. Access control management
28. What is the duration of a single fault required by a Class 2 power grid?
D.≤6h
A.≤8h
B.≤4h
C.≤0.5h
29. In a circuit with resistance and capacitance, if the frequency of the current increases from 50 Hz to 100 Hz, how will the impedance of the circuit change?
A. Increasing
B. Decreasing
C. Unchanged
D. Uncertain
30. Which of the following statements about the data center monitoring system is false?
A. The power system, environment system, and fire extinguishing system can be monitored.
C. Multiple alarm modes, such as voice and short message, are provided.
D. The intelligent monitoring system can improve management efficiency.
B. Remote monitoring is not supported.
31. What is the maximum communication distance of RS485?
B. 100 m
A. 5m
C. 15 m
D. 1200 m
32. Which is the standard name about 2 V/800 Ah VRLA battery?
B. 800-GFM-1
C. 800-GMF-1
D.GEM-800
A. 1-GFM-800
33. Which of the following models is an in-room water-cooled air conditioner?
A. NetCol8000-E220
C. NetCol5000-A042
B. NetCol5000-C065
D. NetCol8000-C070
34. Which of the following is a low-pressure section in the cooling cycle of an air conditioner?
C. From the compressor discharge port to the condenser
D. Condenser interior
A. From the evaporator outlet to the compressor suction port
B. Compressor interior
35. When the active power is 80 kW, the power factor is 0.8, and the rated system voltage is 380 V, 50 Hz, what is the current when the device runs at full power?
C. 210 A
A. 122 A
D. 263 A
B. 152 A
36. In which situation does the UPS work in static bypass mode
D. Batteries are damaged.
B. The mains voltage fluctuates greatly.
A. The mains has no input.
C. The inverter is faulty.
37. Which of the following devices can be used to store video recordings for a long time?
B. NVR
C. AC actuator
A. UPS
D. Switch
38. Which of the following statements about the separator film of lithium ion batteries is false?
D. The thicker the separator film, the better the strength and the better the security, but the lower the energy density and the greater the internal resistance of the electrochemical cell.
A. Allowed lithium ions to pass.
C. Contains micropores and can adsorb electrolyte.
B. Allow electronics to pass.
39. Which of the following does not belong to the integrated cabling system?
C. Cable tray
D. Distribution frame
B. Optical fiber
A. Raised floor
40. Which of the following statements about battery strings in the UPS system is false?
C. If the UPS input voltage and frequency are wide, the battery lifespan can be extended.
A. When the mains input is normal, the mains charges the battery string.
D. When the inverter is faulty, the battery string can still supply power to loads in the case of a power failure.
B. Batteries are an important part of the data center infrastructure and can supply power to loads in the case of a mains failure.
41. Which of the following is not a feature of a modular data center?
A. Faster deployment than traditional data centers.
B. Easy expansion.
C. Compared with traditional data centers, this solution has higher requirements on the deployment environment.
D. Modular products can be pre-integrated and pre-commissioned in the factory in advance.
42. According to Heinrich's Law, which of the following is the proportion of casualties (serious injuries or deaths), minor injuries, and unsafe behaviors in mechanical accidents?
B. 1:50:200
D. 1:29:300
A. 1:10:100
C. 1:35:400
43. Which of the following components can be used to check whether water exists in the air-cooled air conditioner?
D.Oil sight glass
C. Filter dryer
B. Sight glass
A. Solenoid valve
44. Which of the following can be used to spray extinguishing agents in a specified jet mode?
D. Extinguishing agent cylinder
A. Nozzle
C. Start device
B. Fire control piping
45. Which of the following are the working modes of Huawei indirect evaporative cooling air conditioners?
A. Dry mode
B. Wet mode
D. Hybrid mode
C. Mechanical mode
46. Which of the following measures can reduce handling risks?
D. Proper use of personal protective equipment
B. Lighting
A. Avoid strong wind interference
C. Control the carrying frequency
47. Which of the following are communication ports?
C. RS485
B. RJ45
A. DB9
D. Cord end terminal
48. According to the transfer switch type.which of the following items are ATS type?
B. Delay transfer
C. Instant transfer
A. Standard transfer
D. Closed transfer
49. Which of the following statements about the UPS working mode are correct?
B. When the UPS works in ECO mode, the bypass supplies power to loads.
C. If the mains voltage exceeds the UPS input voltage range, the UPS transfers to battery mode.
A. When the UPS works in normal mode, the inverter outputs stable AC power to loads.
D. If the UPS needs to be maintained, the UPS automatically switches to maintenance bypass mode.
50. Which of the following batteries are secondary batteries?
A. Lead-acid batteries
B. Lithium metal battery
D. NiMH battery
C. Hydrogen fuel battery
51. Which of the following are common grounding systems?
D. CT
A. TN-C
C. IT
B. TN-S
52. Which of the following are components of Huawei indirect evaporative cooling system?
C. Water tank
D. Fan
A. Compressor
B. Heat exchanging core
53 Which of the following are functions of Huawei DC AC PDUs?
A. AC power distribution
B. Rectification
D. AC Overvoltage protection
C. AC surge protection
54. What are lead-acid batteries classified into by electrolyte type?
C. Starved electrolyte battery
D. Flooded battery
A. Acid battery
B. Alkaline battery
55. Which of the following statements are true about the considerations in selecting data center cabinets?
D. Grounding reliability
B. Heat dissipation capability
A. Loading capacity
C. Ease of cabling
56. When the data center monitoring system detects a device fault, which of the following methods can be used to transmit alarm information?
B. SMS
C. Telephone
D. Multimedia animation
A. Email
57. Which of the following are air conditioning systems classified into by the concentration degree of air conditioning devices?
C. Distributed type
D. Water type
B. Semi-centralized type
A. Centralized type
58. Which of the following can trigger the switching of battery charging mode?
D. Load power
A. Charging current
C. Charging duration
B. Battery capacity
59. Before installing devices such as the UPS and air conditioner, take personal protection measures. Which of the following are correct measures?
B. Wear helmet
A. Wear insulation gloves
C. Wear a watch to record time
D. Wear safety clothing
60. Which of the following are main internal components of a lithium-ion battery?
D. Separator film
C. Electrolyte
B. Safety valve
A. Positive and negative electrodes
