Usually, they do report a QNH on request (at least in the former USSR), but it is not necessarily correct. ATC may not always be familiar with QNH procedures and seems to calculate the value on the spot on occasion. So do take the time to calculate an expected value from the QFE and the field elevation (27ft per hPa) and check it against the number received from ATC, this might save You some headaches.
Also, for reference: 760mmHg=1013hPa; this is useful in some countries as well.
We used to employ the table on the Jeppesen charts that gave the atitudes in ft over QNH corresponding to the meters over QFE that ATC cleared us to (of course, the table was custom-made for each airfield!), thereby internally flying using ft and QNH but getting cleared by ATC on the local m/QFE system.
Last edited by Tu.114; 8th Dec 2012 at 10:35.