In the Wheelock's workbook (3rd ed. rev) from unit 1, my answer key says that the LAST syllable in several items is stressed:
20 (b) sal ve RE
20 (e) an ti QUA
20 (f) iu va TE
However, the intro to Wheelock's (p. xliv) reads: In a word of three or more syllables (a) the accent falls on the next to last syllable (sometimes called the "penult"), if that syllable is long
(ser-VA-re, con-SER-vat, ...