When you add note questions to your form, these will be exported as empty columns on your data. Unfortunately there is no way to remove them from the data export. This also applies to the logo column.
You can however see the workaround discussed in the following topic
Well Im in the middle of developing the form prior to deploy in field. so for as suggested i can implement the remedy after completion of survey . will try this and get back to u
meanwhile scripting in excel would give what we want… has anyone developed an excel module ?