1.
Every
engineer knows properties of this metal, doesn`t he? разделительный
2.
Does
every engineer know properties of this metal? общий
3.
Does
every engineer or doctor know properties of this metal? альтернативный
4.
What
does every engineer know? Специальный
5.
Which
properties does every engineer know? Специальный
6.
Who
knows properties of this metal? К подлежащему