The phrase "asked them to specify" is correct and usable in written English.
You can use it when requesting clarification or more detailed information from someone.
Example: "During the meeting, I asked them to specify their requirements for the project."
Alternatives: "requested them to clarify" or "inquired for more details".
It initially asked them to specify a volcano that they work on or have worked on, and answer the questions with regard to that volcano.
Additionally, we asked them to specify which of these functions occupied most of their working time.
When we asked them to specify which clients, 26% of professionals who had recommended some type of screening test for colorectal cancer replied that it was those with family antecedents of colorectal cancer, and 23% that it was those with suspicious clinical symptoms, mainly anemia, rectal bleeding and changes in bowel habit.
You could ask these people to reel off the number of times that previous prime ministers were asked if their wives were lesbians: in fact you could ask them to specify those occasions on which previous prime ministers were quizzed on any aspect of their wives' sex lives at all; but they'd be unlikely to take the point, because they are not very bright.
The second destination was dedicated to respondents who claimed to have never consumed avocado fruit, asking them to specify the reasons.
A 1-page, 4-field data questionnaire was mailed to the principal investigators of identified trials, asking them to specify the number of patients enrolled in their trial or trials within the following epochs: 0 to 60, 61 to 120, 121 to 180, and 181 to 360 minutes.
dUnfortunately, we did not ask them to specify the media source.
In both the NHS and HPFS, although we asked participants if they underwent sigmoidoscopy or colonoscopy, we did not ask them to specify the type of procedure.
We ask each doctor "Have you made up your mind about your choice of long-term career?", asking them to choose a response from ' definitely,' ' probably' or ' not really.' We ask them to specify their choice in their own words and to be as general or specific as they wish.
We ask them to specify who they believe the intended users of the device to be, who they consult to inform the MDDD process, what role they believe the user plays within this process, and what value (if any) they believe users add.
Separately, we asked physicians to specify the diagnosis, the seriousness of the illness, and treatment.
