Online Access Free H12-411-ENU Practice Test

Which of the following is advantages of the UPS 2N system? (Multiple choice)

• A.no single path fault point
• B.numerous redundant components, high cost
• C.The UPS system can be serviced without switching the load to maintenance bypass mode
• D.Power supply redundancy

There are three different categories of earthing (TN, TT and IT) in low voltage distribution systems. What does the first letters represent?

• A.Indicates the relationship of the power system to the exposed conductive parts of the power receiving system
• B.Indicates power receiving system exposed conductive parts and the relationship between the ground
• C.Indicates the power system on the ground
• D.Indicates the relationship between neutral N and protective earth PE

The features of UPS are (). (Multiple Choice)

• A.Anti-voltage surge
• B.continue to supply power to the load when there is no utility power
• C.Steady frequency
• D.steady voltage

Huawei chilled water air conditioner rely on which to adjust the water flow?

• A.Globe valve
• B.Butterfly valve
• C.Flow switch
• D.electric two-way valve

Cooling coil controls the indoor temperature and humidity via a heat exchange with refrigerant and indoor air.

• A.False
• B.True