I think this is the case in most congregations, a quick resolution is read out and everyone is expected to raise their hand and support it. Many times the equipment being voted on has already been purchased and installed. However, the recent Accounting Instructions, S-42-b-E 9/19, show that the audience should be allowed to ask questions before the vote is taken:-
17. Procedure for Resolutions: When it is necessary to present a resolution to the
congregations using the Kingdom Hall, the collective body of elders should discuss the matter
thoroughly and agree on the content of the resolution. The operating committee should
prepare a written resolution for presentation at the midweek meeting in each congregation.
The elder serving as chairman for the midweek meeting should briefly and clearly
explain the need to the congregation and the recommendation of the body of elders. Those
in attendance should be allowed to ask questions about the matter before a vote is taken.
Voting on a resolution is done by a show of hands and is limited to those in the congregation
who are baptized, unless legal requirements direct otherwise. If the resolution is approved
by the majority in attendance, it should be dated, signed by the coordinator of the
body of elders and the secretary, and given to the operating committee coordinator. The
resolution should be placed in the appropriate monthly folder in the current file.
This has certainly not happened in my congregation!