function GetTimeStr(Sec: Integer): string;
begin
  if Sec >= 3600 then
    Result := Format('%d hour %d min %d sec', [Sec div 3600, Sec mod 3600 div 60, Sec mod 60])
  else if Sec >= 60 then
    Result := Format('%d min %d sec', [Sec div 60, Sec mod 60])
  else
    Result := Format('%d sec', [Sec]);
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
caption:=GetTimeStr(120);
end;