Acting according to the needs of the situation is probably useful.
If, for example, an elder is teaching the fellow believers about a certain topic, it is certainly within his Christian liberty to allow for questions and discussion. However, all should probably guard against rabbit-trails that are not "done unto edifying" (1 Cor. 14:26).
From the 1556 Geneva Book of Church Order: Quote:
Prophecy or Interpretation of Scriptures
Once every week, the congregation assembles to hear some place of the scriptures orderly expounded.[a] At which time, it is lawful for every man to speak or enquire, as God shall move his heart, and the text minister occasion; so it be without pertinacity or disdain, as one that rather seeks to profit than to contend. And if [it] so be any contention arise, then such as are appointed moderators, either satisfy the party, or else if he seems to evil, exhort him to keep silence, referring the judgement thereof to the ministers and elders, to be determined in their assembly or consistory before mentioned.
a. 1 Cor. 14:1ff.; 1 Thess. 5:20; Eph. 4:29; 1 Cor. 12:28-31
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However, it is also within his liberty to deliver his message all at once and then allow for questions and discussion afterwards.
Men are not bound by a command given to women to remain silent. In fact, perhaps men would grow more in grace and knowledge of the Lord if they were actively involved in the learning of the Word. Asking questions, adding useful exhortations and explanations, etc.