H12-411-V2-0 Practice Exam — 56 Free Huawei Questions

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Question 1

Which of the following are functions of a transformer? (Choose all that apply.)

A Frequency conversion
B Current conversion
C Voltage conversion
D Isolation

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Which of the following are subsystems of the integrated cabling system? (Choose all that apply.)

A Work area subsystem
B Building management subsystem
C Management subsystem
D Campus subsystem

DRAG DROP -
During the capacity expansion of a data center, five devices a, b, c, d, and e are added. The power is 3 kW, 4 kW, 6 kW, 7 kW, and 10 kW respectively, and the rated voltage is 220 V. As shown in the following figure, a new power distribution box is configured for the five devices. Please match the devices c, d, and e with the wiring terminals in the power distribution box.

Question Image

STS and ATS are used to switch between two inputs.

A TRUE
B FALSE

The ATS inputs can connect with two mains (one is active and the other is standby). The two inputs can also be mains and diesel generator.

A TRUE
B FALSE

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What does the DC SPD mean?

A DC surge protective device
B AC surge protective device
C DC residual-current device
D AC residual-current device

DRAG DROP -
The following figure shows the power distribution system architecture of a data center. Please match devices to the correct positions in the system.

Question Image

Which of the following statements about direct current are true? (Choose all that apply.)

A The direction of direct current does not change periodically with time.
B It is easier to extinguish direct current arcs than alternating current arcs.
C The value of direct current is constant.
D Electronic devices are suitable for direct current power supply.

The output power factor of 100 kVA UPS is 0.95, the load is 60kW, if the system must be configured in redundancy, how many UPSs are required at least?

A 2
B 5
C 3
D 4

Reactive power does not affect the UPS.

A TRUE
B FALSE

If the UPS frequently switches to the battery mode, the battery lifespan will be shortened.

A TRUE
B FALSE

Which of the following are advantages of Huawei FusionPower series products? (Choose all that apply.)

A Small footprint
B Full-modular redundancy design
C Integrated UPS and input and output cabinet, high efficiency
D Visualized full-link monitoring

For battery connection of UPS, first connect single battery in series, then battery strings need to be connected in parallel.

A TRUE
B FALSE

In chilled water air conditioner, the surface cooler exchange heat between refrigerant and indoor air.

A TRUE
B FALSE

Sensible heat ratio = Sensible heat/Total heat = Sensible heat/(Sensible heat + Latent heat)

A TRUE
B FALSE

Air-cooled direct expansion air conditioners are generally applicable to scenarios with cooling towers.

A TRUE
B FALSE

For saturated air, which of the following is the correct relationship among dry bulb temperature, wet bulb temperature and dew point temperature?

A Wet bulb temperature > Dry bulb temperature > Dew point temperature
B Dry bulb temperature = Wet bulb temperature = Dew point temperature
C Dry bulb temperature > Dew point temperature > Wet bulb temperature
D Wet bulb temperature > Dew point temperature > Dry bulb temperature

Which is not the four major components of the refrigerating cycle?

A Fan
B Compressor
C Evaporator
D Condenser

For unsaturated air, which of the following is the correct relationship between the wet bulb temperature and dry bulb temperature?

A Uncertain.
B The wet bulb temperature is higher than the dry bulb temperature.
C The wet bulb temperature is equal to the dry bulb temperature.
D The wet bulb temperature is lower than the dry bulb temperature.

The access control management system allows admin to create, configure, and manage access rights.

A TRUE
B FALSE

The air system can adjust indoor airflow.

A TRUE
B FALSE

Which of the following is a low-pressure section in the cooling cycle of an air conditioner?

A Condenser interior
B From the evaporator outlet to the compressor suction port
C From the compressor discharge port to the condenser
D Compressor interior

Which of the following PUE value meets the requirement of an advanced green data center?

A 1.2
B 1.9
C 0.9
D 2.5

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