Tina,
I suggest taking a look at the practice test
http://www.nukeworker.com/quiz/quiz_info.php?quiz_id=16 That will give you an idea of what questions may be on it...
Here is information on requirements to take the test:
"# Education
The applicant shall have a high school diploma or equivalent. In addition, the applicant must submit to the Board evidence of operational abilities as a Radiation Protection Technologists.
# Age
The applicant shall be at least 21 years old at the time of application.
# Experience
An applicant must have a minimum of five years experience. Training may be substituted for experience if the applicant will submit to the Board information about the program and proof of completion. This information should include curriculum, typical examinations, and passing requirements for radiation related subjects.
Experience credit allowed for formal education, company training programs and applicable military training is cummulative up to a maximum of two years. Note that an applicant may not claim work experience while in formal classroom study.
# Examination
After approval of the application, the prospective registrant must successfully complete a national examination.
The applicant shall have a high school diploma or equivalent. In addition, the applicant must submit to the Board evidence of operational abilities as a Radiation Protection Technologists.The applicant shall be at least 21 years old at the time of application.An applicant must have a minimum of five years experience. Training may be substituted for experience if the applicant will submit to the Board information about the program and proof of completion. This information should include curriculum, typical examinations, and passing requirements for radiation related subjects.Experience credit allowed for formal education, company training programs and applicable military training is cummulative up to a maximum of two years. Note that an applicant may not claim work experience while in formal classroom study.After approval of the application, the prospective registrant must successfully complete a national examination."
I found this information on NRRPT.org which is the official site of The National Registry of Radiation Protection Technologist. It contains more information on what is needed for the test such as study information and fees.
I suggest looking under Examination Information and FAQ's
The NRRPT.org site and this site should be able to answer your questions on why the test is so esteemed in our circles.
Have a good one!