I would like to ask the non-commissioned officers in the army what conditions are needed to take the examination of electrical engineers, and whether soldiers in the army can apply locally?

There is no problem in theory, but the reality is different. First of all, are your friends relatives? If it doesn't matter, forget it. Petty officers have to work and explain the situation to their leaders, which can almost give you some time to study. Then there is the question of applying for the exam, which is difficult to operate. Find a relationship if you have one, don't worry about it yourself. There are many people in the army who want to realize some of their wishes like your friends for one year, but few of them. . . . . . . . . . . . It is estimated that your friend has endless work to do all day.