Written tests for DCWs are permissible to be an open book test. Students may have a maximum time limit of 1 minute per question. The time must be proctored to ensure the time limit has not been exceeded. Trainers are not permitted to take open book tests. There are no other time limitations for testing. Generally, the written testing can take 1-2 hours and the skills test takes approximately 45 minutes to 1 hour.