  We show that the Maharam extension of a conservative. non singular K
Bernoulli shift without an a.c.i.p. is a K transformation. This together with
the fact that the Maharam extension of a conservative transformation is
conservative gives a negative answer to Krengel's and Weiss's questions about
existence of a type II}_\infty or type III}_\lambda with \lambda not equal to 1
Bernoulli shift. A conservative non singular K Bernoulli shift is either of
type II_1 or of type III_1.
