T (Thymus Derived) Lymphocyte Count. Definition. T cells are a type of white blood cells (lymphocytes). They make up part of the immune system. T cells help the body fight diseases or harmful substances. A test can be done to measure the number of T cells in your blood. Thymus derived lymphocyte count; T-lymphocyte count.
The road test generally takes 15 to 20 minutes. 1  If you fail the road test you must wait a minimum of two weeks (14 days) before taking the road test again and must pay another $40 testing fee. 2  Test results are valid for 2 years. If you fail the road test you must wait a minimum of two weeks (14 days) before taking the road test again and must pay another $40 testing fee. 2  Test results are valid for 2 years.
Driving theory test: how it works and how to pass. To pass the driving theory test, you will need to pass the multiple choice question section and hazard perception test in one go. For the multiple-choice section, you will be required to answer fifty questions in 57 minutes.ou will receive your score at the end of your test with (if you pass) a certificate. â¢ Best first cars for young drivers. If you have a Safe Road User Award, an âabridgedâ theory test can be taken. This costs less at Â£19 and requires the candidate to pass 30 out of 35 questions correctly.