RKCB

Asking about the Queen of trumps 

When the RKCB answer doesn't include the information about the Queen of trumps, the next bid (previously bid suits are irrelevant) asks about the Queen of trumps. 

Without the Queen of trumps, we bid trump on the first possible level (usually 5)

Having it, we bid the suit where we hold a King. Without a King on side, we bid trump on level 6.

Holding King above trump suit, we bid 5NT. 

When we were asking about the Queen of trumps above 5 in trumps, the answers are identical, except that 5 NT only confirms the Queen of trumps and says nothing about the Kings.

A JUMP to 6NT confirms the Queen of trumps and promises the stock of tricks. With all RKC, partner can rise to level 7 (suit or NT).