H12-411_V2.0

H12-411_V2.0 practice questions, page 2 of 3, with answer review and explanations.

Question 6

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.

  1. TRUE
  2. FALSE

Question 7

What does the DC SPD mean?

  1. DC surge protective device
  2. AC surge protective device
  3. DC residual-current device
  4. AC residual-current device

Question 8

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

  1. The direction of direct current does not change periodically with time.
  2. It is easier to extinguish direct current arcs than alternating current arcs.
  3. The value of direct current is constant.
  4. Electronic devices are suitable for direct current power supply.

Question 9

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?

  1. 2
  2. 5
  3. 3
  4. 4

Question 10

Reactive power does not affect the UPS.

  1. TRUE
  2. FALSE