[MW:5481] Active TIG?

Dear Friends,
 
Can  anybody clarify my doubt….please,

 

the  question is” what is A –TIG (Active-TIG) ?”

 

This question is  asked in AMIIW(Associate  membership in Indian Institute of Welding-kolkata-www.iiwindia.com) Exam-Summer-2009(AME-15)

 

Thanks,

Regards,

 K.NANDAGOPAL ;

+91 9698997022

+91 9360049258-

Tamilnadu,

INDIA