As per your request I am here suggest you good books for Oil and Natural Gas Corporation (ONGC) Graduate Trainee (Electrical Engineering) Examination.

Reference Books for ONGC Graduate Trainee (Electrical Engineering) Written Test

Books for Quantitative Aptitude
Quantitative aptitude by R S Agarwal

Books for Verbal/ Non-verbal Reasoning
Critical Reasoning Preparation Guide by Manhattan
A Modern Approach to Verbal and Non Verbal Reasoning by R S Agarwal

Books for Reading Comprehension
Objective General English by Puri
English Language by Lucent’s General English

Books for General Awareness
Competition Success Review
Manorama Year Book
Prathiyogitha Darpan
General Awareness & Current Affairs by Manohar Pandey

Books for Analog Electronic circuits
Microelectronic Circuits by Sedra & Smith
Integrated Electronics by Milman & Halkias
Electronic principles by Malvino
Electronic Devices -System & Application by Robert Diffenderfer

Books for Electric Circuit theory
Network Analysis by M.E. Valkenburg
Engineering Circuit Analysis by W.H. Hyat, J.E. Kemmerly
Introduction to Electric Circuits by Richard C. Dorf, James A. Svoboda

Books for Digital Electronic circuit
Fundamental of Digital Circuits by A. Anand Kumar
Fundamental of logic Design by Charles H. Roth

Books for Electrical & Electronic measurement
Electrical Measurements & Measuring instruments by Rajendra Prasad
Modern Electronic instrumentation and measurement techniques by Albert D Halfride