ARRT examinations are administered on computers. Candidates are presented with multiple-choice questions on a computer screen and directed to select an answer using either the keyboard or mouse. Candidates may review or change any answers to any questions prior to submitting the completed examination for scoring.
A tutorial offered at the beginning of each examination allows the candidate to answer several practice questions. This ensures that the candidate is thoroughly familiar with the process and item formats.
Most test items are standard multiple-choice questions with one best answer. However, some examinations consist of a limited number of questions that use other common formats.

The Duration and Length of Certification Exams
The length of time allowed for the administration is based upon the total number of items (i.e., test questions). The total number of items is made up of "scored items" and "pilot items"

Source: ARRT 2010 Examination Handbook