Breath alcohol detection tests is one of the topics in the General rules block of the Spanish DGT theory. Defines who the traffic rules apply to and where, the basic definitions and the principles behind the whole theory. Understanding this section well helps you answer the theory-exam questions on this topic with confidence.

In simple terms, this point of the DGT theory establishes that tests to detect possible alcohol intoxication will be carried out by the officers in charge of traffic surveillance and will normally consist of checking the exhaled air using officially authorised breathalysers which will quantitatively determine the degree of alcohol impregnation of the interested parties. At the request of the interested party or by…

The exam often asks where and to whom these rules apply; read the options carefully, as they frequently change a single word.