The Q code was originally developed as a way of sending shorthand messages in Morse code. However, it is still used by operator for voice communications. The following ones are in common use.
QRA What is your QRA ( call sign ) ?
QRM I have QRM (interference).
QRN I have QRN (static interference).
QRT I am QRT (closing down).
QRV I am QRV (ready to receive messages).
QRX Please QRX (wait a moment).
QRZ Please QRZ (say your call sign again).
QSB There is QSB ( your signals are fading).
QSO Thanks for this QSO (contact).
QSP I have a QSP (message) for another station.
QSY Please QSY (change frequency)
QTH My QTH (location) is Zuidhorn.
QSL A postcard send by each station to acknowledge the contacts made. One side of the card normally carries a design. The other side has the technical details of the contact.