Clarence L.Kerr;77;of Belle Vernon R.D.2;died suddenly Thursday;July 20;1989;at 10:49 p.m.in Mon Valley Hospital;Carroll Township. Mr.Kerr was born Oct.6;1911;in Versailles;Pa.;a son of the late William and Florence Kerr. He was a retired electrician with 46 years of service at the Monessen Works of Wheeling-Pittsburgh Steel Corporation. Mr.Kerr was a member of the United Methodist Church;Monessen. A sister;Mildred Cramer;and a brother;William Kerr;are deceased. Surviving are his wife;Marion Callaway Kerr;a son;Ronald Kerr;of Bristol;Conn.;a brother;Howard Kerr;of Punxsutwney;Pa.;a sister;Mrs.Joseph (Geraldine) Stangl;of Fayette City;three grandchildren;and several nieces and nephews. Friends will be received Saturday from 7 to 9 p.m. and Sunday from 2 to 4 and 7 to 9 p.m. in the Rhome Funeral Home;Inc.;1209 Grand Blvd.;Monessen. Services will be held Monday at 1 p.m. in the chapel of the funeral home;with the Rev.William O.Anderson officiating. Burial will be in Belle Vernon Cemetery. The Rhome Funeral Home;Inc.;is in charge of arrangements.