which descriptive test are you actually talking about ?
Descriptive test for Assistant Director or just Assistant?
For the test of Assistant Director, yes there will be two descriptive exams separately. The reporting times is 8 a.m for AD-1 and 11 a.m for AD-2... One will be of english essay and the other will be of Current affairs..
And I have completely no idea about the test of Assistant or whatever that is. Start preparing instead of wasting time overthinking or check past papers, you'll get a wild guess about the syllabus