QUESTION: 5

To determine whether the R410A refrigerant meets requirements, compare the internal pressure of the refrigerant with the saturation pressure corresponding to the refrigerant temperature. If the difference between the internal pressure and the saturation pressure is within the range of which of the following, replace the refrigerant?

0-0.05 MPa
0.05-0.1 MPa
0.1-0.2 MPa
0.25-0.3 MPa

Answer(s): B

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QUESTION: 6

Which of the following statements is false about the ECM of the UPS5000-E?

As a control interface for the entire system, the ECM communicates with each module and provides a bus for communication between the dry contact card and the system control card.
The ECM controls the bypass module to work properly, if one ECM is faulty, the UPS can still work in normal mode but cannot be manually switched to bypass mode.
The ECM ensures equalized output currents between modules so that load power is equally shared.
The ECM provides three types of CAN communication: monitoring CAN communication, intra-rack parallel CAN communication, and inter-rack parallel CAN communication.

Answer(s): B

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