There are 350 multiple-choice examination questions in total; these can be divided into 2 groups; 200 questions in Session One (Scientific Basis for Dental Hygiene Practice, Provision of Clinical Dental Hygiene Services and Community Health/Research Principles).Click to see full answer. Also asked, how many questions can you miss on the Nbdhe?You have to get at least 203 – 214 correct to give you a standard score of 75! That means you can get 136-152 questions incorrect on the entire national board to have at least a 75 score on the National Boards!Subsequently, question is, is the dental hygiene Board exam hard? One of the many board exams a dental hygiene student must take is the national dental hygiene board exam (NBDHE). The NBDHE definitely can be very intimidating. It’s one of the many steps and requirements for licensure and becoming a dental hygienist. The exam is broken down into two parts with many subsections. In this way, how many questions do you need to pass NBDE? They ask 400 questions and to pass you should score 75 %, i.e 300 correct responses as there is no negative marking.How long is the dental hygiene Board exam?This four-hour exam consists of 2 two-hour sessions delivered back to back but with a compulsory 15 min break in between; the passing score is calculated using a proven psychometric method. The scaled score range is from 200 to 800 with a passing score of 550.