The National Board for Respiratory Care, Inc. is a voluntary health certifying board created in 1960 to evaluate the professional competence of respiratory therapists and pulmonary function technologists.

There are two established cut scores for the Therapist Multiple-Choice Examination. Candidates may become eligible to take the Clinical Simulation Examination by achieving the higher cut score on the Therapist Multiple-Choice Examination.

The Therapist Multiple-Choice Examination consists of 160 multiple-choice questions (140 scored items and 20 pretest items) distributed among three major content areas: Patient Data Evaluation and Recommendations, Troubleshooting and Quality Control of Equipment and Infection Control, and Initiation and Modification of Interventions

Here are NBRC RRT passing score detail:

Examination Total Questions Candidates Must Answer
Scored Questions Pretest Questions
TMC 140 20 160
NPS 120 20 140
SDS 160 20 180
ACCS 150 20 170
PFT 100 15 115

NBRC other exam:
CRT – Certified Respiratory Therapist
RRT – Registered Respiratory Therapist*
CPFT – Certified Pulmonary Function Technologist
RPFT – Registered Pulmonary Function Technologist
CRT-NPS or RRT-NPS – Neonatal/Pediatric Specialist
CRT-SDS or RRT-SDS – Sleep Disorders Specialist
RRT-ACCS – Adult Critical Care Specialist