To be admitted to an ITI in Mangrol, Rajasthan, you generally need to have passed class 10 from a recognized board and be between 14 and 22 years old. 

Here's a more detailed breakdown of the ITI admission criteria:

General Eligibility:
Age:
The minimum age for admission is 14 years, with no maximum age limit in some cases. 
Educational Qualification:
Class 10: For many trades, you'll need to have passed class 10 (Madhyamik or equivalent) from a recognized board. 
Science and Maths: Some trades may require you to have passed class 10 with Science and Maths as subjects. 
10+2: Some trades may require you to have passed class 10+2 with Science and Mathematics or its equivalent. 

Other Requirements:
No Gap: ITI pass-outs/failed/drop-out/discharged candidates cannot apply for admission in a different ITI before a gap of 1 year, or in the same ITI before a gap of 3 years. 
No Full-Time Course: Candidates pursuing any other full-time course cannot apply. 
No Diploma/BE/BTech: Candidates who have passed Diploma Engg. or B.E./B. TechEngg. under AICTE need not apply. 

Check the Website: The registration form will be available on the official website of the respective ITIs. 
Merit List: Admission is usually based on a merit list. 

Contact the ITI: If you have any questions, contact the ITI directly for clarification.