Question 1

Under the same load conditions,ups The backup time is mainly determined by the battery capacity and the

number of battery cells. The larger the battery capacity, the longer the backup time.

Options :

A : True

B : False

Answer: A

Question 2

In the main road mode, when ups The front-end voltage is at 220V±10%When fluctuating,ups The output voltage will also have Larger fluctuations.

Options :

A : True

B : False

Answer: B

Question 3

There are generally two types of variable air volume ventilated floors, one is through an adjustable air valve, and the other is a dedicated ventilated floor plus adjustable fans.

Options :

A : True

B : False

Answer: A

Question 4

Environmentally friendly refrigerant R410A Refrigeration performance is better than non-refrigerant R22 better.

Options :

A : True

B : False

Answer: B

Question 5

MCB Circuit breakers can be divided into different tripping characteristics B, C, D, Z, K Level, for IT For load, you should use ____________ class Tripping characteristics.

Options :

A :

Answer: