$strSql = UserFeedTable::getInstance()>createQuery('q')>
select('q., f., fi., fav.')->
leftJoin('q.Feed f')->
leftJoin('f.FeedItem fi')->
leftJoin('fi.Favorite fav')->
andWhere('q.profile_id = ?', $intUserId)->
andWhere('q.is_active = ?', true)->
limit(10)->getSqlQuery();
var_dump($strSql);

string(1075) "SELECT u.id AS u_id, u.name AS uname, u.image AS uimage, u.lead AS ulead, u.headline AS uheadline, u.sort AS usort, u.is_active AS uis_active, u.is_favorite AS uis_favorite, u.feed_id AS ufeed_id, u.profile_id AS uprofile_id, u.category_id AS ucategory_id, u.created_at AS ucreated_at, u.updated_at AS uupdated_at, f.id AS fid, f.url AS furl, f.name AS fname, f.created_at AS fcreated_at, f.updated_at AS fupdated_at, f2.id AS f2id, f2.lead AS f2lead, f2.description AS f2description, f2.image AS f2image, f2.pub_date AS f2pub_date, f2.link AS f2link, f2.feed_id AS f2feed_id, f2.created_at AS f2created_at, f2.updated_at AS f2updated_at, f3.id AS f3id, f3.profile_id AS f3profile_id, f3.feed_item_id AS f3feed_item_id, f3.created_at AS f3created_at, f3.updated_at AS f3_updated_at FROM user_feed u LEFT JOIN feed f ON u.feed_id = f.id LEFT JOIN feed_item f2 ON f.id = f2.feed_id LEFT JOIN favorite f3 ON f2.id = f3.feed_item_id WHERE u.id IN ('7', '8', '9', '10', '11') AND (u.profile_id = ? AND u.is_active = ?)"

As you can see, the limit is missing.