CARJ FLT CREW ENCOUNTERS A FLAP FAILURE ON ARR. PERFORMS APPROPRIATE CHKLISTS; DECLARES AND EMER AND LANDS ON AN APPROPRIATE RWY.

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APCHING ZZZ ARPT (OUR DEST); WE WERE GIVEN RWY 27 FOR LNDG AND WERE BEING VECTORED BY APCH CTL APPROX 18 MI SE OF ZZZ ON A LONG BASE LEG AT 4000 FT MSL. APCH ASKED US TO SLOW TO 190 KTS. AT 200 KTS; I ASKED THE CAPT TO SELECT FLAPS 8 DEGS. WHEN THE LEVER WAS IN THE 8 DEG DETENT; WE RECEIVED A 'FLAPS FAIL' CAUTION MESSAGE AT AN INDICATION OF FLAPS 0 DEGS. AS I WAS THE PF; I TOOK THE RADIOS AND THE CAPT RAN THE QRH ABNORMAL PROC FOR 'FLAPS FAIL.' WE DECLARED AN EMER AND TOLD ATC WE REQUIRED A LONGER RWY FOR LNDG. WE WERE OFFERED RWY 4R OR RWY 33L AND WE ELECTED TO ACCEPT RWY 33L (WIND 340 DEGS AT 25 KTS). WHILE FOLLOWING THE PROCS; THE CAPT DISCUSSED WITH ME THE APCH AIRSPD FOR THE CONFIGN; RWY LENGTH REQUIREMENTS AND TOUCHDOWN TECHNIQUE. THE CAPT BRIEFED THE FLT ATTENDANT AND TOLD HER WE EXPECTED A NORMAL LNDG; SO NO NEED TO ALARM THE PAX. WE WERE VECTORED TO RWY 33L WHERE WE LANDED FLAPS 0 DEGS. THE LNDG WAS UNEVENTFUL. ONE OF THE CFR TRUCKS FOLLOWED US TO THE GATE WHERE THE CAPT CALLED DISPATCH AND MAINT.