Here are some places where prometric exams are conducted in New Delhi.
Call them and they should be able to help you in registering.
PROMETRIC
TESTING (P) LTD
A-160 SENIOR PLAZA
BEHIND INDIAN OIL BUILDING
GAUTAM NAGAR
NEW DELHI, Delhi 110049
Phone: 26532324 Site Code: II000
PROMETRIC TESTING (P) LTD.MOBILE SITE
A-160 SENIOR PLAZA
GAUTAM NAGAR
BEHIND INDIAN OILD BUILDING
NEW DELHI, Delhi 110049
Phone: 011-26532237 Site Code: II00M
KHANNA INFOTECH
158, Kapil Vihar
Pitampura
NEW DEHLI, Delhi 110034
Phone: 27197740 Site Code: IIAB
KOENIG SOLUTIONS
14 MAIN PATEL ROAD
WEST PATEL NAGAR
NEW DELHI 110008
Phone: 011-2588 9495 Site Code: II26
NIIT LTD
C1/30 SAFDARJUNG DEVELOPMENT
AREA BEHIND AUROBINDO MARKET
NEW DELHI, Delhi 110016
Phone: 91 11 2651 6461 Site Code: II5
SOFTWARE TECHNOLOGY GROUP LTD
NEW DELHI, Delhi 110 049
Phone: 91112465 6925/26 Site Code: IIA F-35
N.D.S.E. PART I
INSTITUTE OF ADVANCE COMPUTING AND MANAGEMENT
H-9, SOUTH EXTENSION-1,
NEW DELHI, Delhi 110049
Phone: 011-2469 3357 Site Code: IIC88
NEW HORIZONS INDIA LTD
UGF , SOUTH TOWER, NBCC PLACE
BHISHMAH PITAMAH MARG
NEW DELHI, Delhi 110003
Phone: 24365715 Site Code: IIF46
NIIT LTD.
D-5 SOUTH EXTN
PART -II
NEW DELHI, Delhi 110049
Phone: 26255936 Site Code: IIN26
NIIT LTD
F-205 ADITYA ARCADE
PREET VIHAR
NEW DELHI, Delhi 110092
Phone: 22510347 Site Code: IIN28
Good Luck.