Here I am giving you name of some best books for preparation of Engineers India Limited placement exam preparation ..

EIL exam books
Mechanical Vibration by V.P. Singh and G.K. Grover
Theory of Machines by S.S. Rattan and Thomas Bevan
Objective Mechanical Engineering by P. K. Mishra
Fluid Mechanics by D.S. Kumar, K.I.Kumar, Cengel & Cimbala and Frank.M.White
Popular Master Guide Mechanical Engineers by R. Gupta
Refrigeration and Air Conditioning by P. K Nag and C.P. Arora Domkundwar
Mechanical Engineering (Objective Type) by R.K. Bansal
I.C. Engine by R.P. Sharma and M. L. Mathur
Machine Design by Shigley and V.B. Bhandari