The higher secondary examinations commenced at 46 centres in the district amid police security on Thursday.
Official sources told reporters that as many as 21,815 students (9,899 boys and 11,916 girls), which include 1,179 students (679 boys and 500 girls) registered privately, had enrolled from the district for the examination.
Services of around 1,300 teachers had been roped in for supervisory works in the examination centres.
A total of 70 standing and flying squads had been constituted in the district to check any malpractices during the examination. The question papers for the examination were stored in seven places in the district under tight security. Education Department sources said hired generator sets had been provided to all the examination centres for ensuring smooth conduct of the examination.
Sources said the government would be bearing the expenses incurred for hiring the generator sets meant for the 28 examination centres functioning on government school premises while the hiring charges of the sets kept on private school premises borne by the respective institution managements.
Collector M. Mathivanan conducted a lightning inspection in some examination halls.