Taking the RRT / CRT Exam?

Eligibility

You must be a graduate and at least 18 years of age
You must have completed a college level program in respiratory therapy, and reside in the United States or Canada.
You must provide a college transcript within 60 days of passing the exam or you will forfeit your certified respiratory therapist license.

You can register online for CRT Exam at the NBRC website
http://www.nbrc.org/Examinations/CRT/tabid/61/Default.aspx

CRT Exam is specifically designed for examining the knowledge, abilities and skills essential for entry-level respiratory therapists.
The certified respiratory therapist license is the first level of therapy that new college graduates will achieve. The CRT license exam must be passed before you can take exams for any of the special licenses.
This is a computer based test which is held at over 150 testing centers in US.
Exams can be scheduled for Monday through Fridays, and specific times are noted on the NBRC website.
It is highly recommended that an applicant should schedule his exam at least three days prior to the desired test date.
You must get at least 75% of the questions correct in order to receive your license.

Type of Questions: Multiple Choice Questions
No. of Questions: 160
Scoring Questions: 140
Pre-test Questions: 120
Duration: 3 hours

 Licensing exams are required with every state and there are five classifications:

CRT (Certified Respiratory Therapist)
RRT (Registered Respiratory Therapist)
CPFT (Certified Pulmonary Function Therapist)
RPFT (Registered Pulmonary Function Therapist)
Neonatal/Pediatric Specialists