Question 1

In a data center where precision cooling units are supplied by single-phase power, using dual power supplies and ATS for switching can meet Tier III requirements if both units share a single ATS.

Options :

A : True

B : False

Answer: B

Question 2

Adjusting the high air temperature at the end of the cooling system can effectively reduce the energy consumption of the cooling system and lower the PUE (Power Usage Effectiveness) value.

Options :

A : True

B : False

Answer: A

Question 3

If the moisture content in the air remains constant, the dew point temperature is fixed, but relative humidity changes with temperature variations.

Options :

A : Correct

B : Incorrect

Answer: A

Question 4

Regarding the use of circuit breakers, which of the following descriptions are correct?

Options :

A :

A frame circuit breaker can be used for low-voltage main distribution cabinets where the incoming current is very large

B :

A plastic shell circuit breaker should be used for a precision air conditioner with a cooling capacity of 42kW; a miniature circuit breaker cannot be used.

C :

A miniature circuit breaker can be used in precision distribution cabinets.

D :

A plastic shell circuit breaker can be used for a 200kVA UPS distribution cabinet.

Answer: A,C,D

Question 5

Which of the following statements regarding energy-saving strategies is correct?

Options :

A : Using only direct natural cooling is insufficient to meet Tier III standards

B :

Mechanical cooling combined with direct and mixed cooling, along with high building height and outdoor air quality requirements, is essential.

C : Natural water cooling has high water source requirements but poses no environmental risks.

D :

Utilizing an indirect evaporative cooling system can effectively lower indoor temperatures using low outdoor temperatures and extend the operational time of natural cooling.

Answer: A,B,D