Applicability of service tax

Manikanta (Accounts Manager) (9 Points)

25 May 2017  

A man installed the Computer systems in a place which is using for the conducting online examinations. The companies like(TCS,SIFY.etc) are giving contracts to the man saying this much systemd required for the examination. per system they will pay the amount. For invigilators and electricity amount will be reimbursed. 

Let me know is it a works contract or purely service. and rate of tax applicable.?