The results of energy distribution measurements for fragments from Pu239 and Pu240 fission induced by neutrons with energies corresponding to the known levels within the region from 0 to 10 ev are reported and compared. For fragment enengy measurements a grid ionization chamber with an amplitude analyzer was used. Selection of fission events induced by monochromatic neutrons was made by means of a mechanical velocity selector and a time analyzer. The results of fragment energy distribution measurements are given for spontaneous and induced fission. The experimental data obtained are discussed according to modern conceptions of the fission process. (auth)