try online at

http://www.123eng.com/

http://www.tcyonline.com/exam-preparation

http://www.careerlauncher.com/

http://www.indiastudychannel.com/questions/Category1.aspx

http://www.freshersonline.com/

http://www.funeducation.com/Tests/

http://www.wiziq.com/tests/aptitude-test

http://www.career-tests-guide.com/free-online-aptitude-test.html

http://www.indiabix.com/