Practice Free H12-411_V2.0-ENU Exam Online Questions
R410A refrigerant can freeze human skin and deeper muscles in a very short time the moment it is sprayed outside, and cause necrosis of the skin adjacent to the frostbite.
- A . True
- B . False
UPS2000-G has a graded power-off function. Which function is not included in the hierarchical power-off function?
- A . When overloaded, turn off the secondary load to eliminate the overload
- B . Turn off secondary loads in battery mode to extend the backup time of important loads
- C . Turn off secondary loads in battery mode to protect the battery
- D . Turn off secondary loads to adjust the load ratio and optimize operating efficiency
The access control system can only set the user to open the door but cannot set when the door can be opened.
- A . True
- B . False
Cooling towers can be divided into cross flow and counter flow types according to the direction of air flow.
- A . True
- B . False
Which of the following is the longest phase in the data center life cycle?
- A . Operation and Maintenance
- B . Construction
- C . Design
- D . Planning
The function of the fire protection system is to automatically capture the smoke or heat when a fire occurs in the fire detection area, thereby issuing an audible and visual alarm and automatically extinguishing the fire.
- A . True
- B . False
Compared with ternary lithium batteries, which of the following are the advantages of lithium iron phosphate batteries? (Multiple choice)
- A . High energy density
- B . Long lifespan
- C . Good safety
- D . Cheap raw materials, good economy
UPS5000-A has reliable, efficient and simple design features. Which of the following statements about UPS5000-A-400/500K are correct? (Multiple choice)
- A . UPS5000-A-400/500K built-in parallel components
- B . UPS5000-A-400/500K supports top airflow
- C . UPS5000-A has two control units
- D . UPS voltage input range 138-485Vac
By configuring different external units and components, Huawei’s air-cooled precision air conditioners can adapt to the following ambient temperatures: outdoor -40 ℃ ~ +55 ℃ , humidity: ≤95%RH
- A . True
- B . False
While the NETCOL5000-A air conditioner is turned on and tested, which of the following statement is wrong about the possible reasons for the high exhaust pressure alarm?
- A . The outdoor fan cannot start
- B . Outdoor fan speed pot bottom
- C . Overfilling of cold disc
- D . Cold plate charge is too low