Question 1

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 2

When calculating the power demand of a UPS (Uninterruptible Power Supply) system, only the backend capacity needs to be considered, and redundancy for the load does not need to be accounted for, while the capacity of the battery can be ignored.

Options :

A : True

B : False

Answer: B

Question 3

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 4

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 5

For a data center with a standard designation of GB50174-A, which of the following descriptions regarding the load classification is incorrect?

Options :

A : IT load is a crucial load in the first-level load category.

B : Chilled water units are classified as first-level loads.

C : Fire safety equipment in the machine room is classified as second-level load.

D : Cooling towers and chilled water pumps are classified as first-level loads.

Answer: C

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