Restraint self-correcting test type tests.

摘要

Improvements in Patent No. Invention 9900591 concerning "self-correcting safety system test exams" comprising a printed, with an area to fill in the data and another to mark the responses made up of several carbonless sheets, one of the which it is removable, marking it only errors since the Kalchas substance preceding sheet has windows in areas corresponding to correct answers, while another sheet brings premarked correct answers and has an opaque cover fitted with Kalchas substance on its reverse side, cover which is removable for revision if challenge test, in which improvements the sheet where coming premarked correct answers do not have opaque cover, while the preceding sheet, preferably the extractable sheet is provided with Kalchas substance on its reverse side, at least across the surface corresponding to the area marking answers.