The book is specially published for the aspirants of Junior Engineer (Electrical/Mechanical) Recruitment Exam conducted by Delhi Development Authority (DDA). The book comprises, along with the Latest Study and Practice Material, a Solved Model Paper to make you well-conversant with the exam pattern and the type of questions asked with their solutions. Detailed Explanatory Answers have also been provided by subject-experts for the Selected Questions for Better Understanding. The book is highly recommended to Enhance your Problem Solving Skills with thorough practice of numerous questions provided in the book, and prepare you to face the exam with Confidence, Successfully. Based on the Current Pattern of exam, the book will prove very useful to you for study, practice and for reference during the precious moments before the exam. The book contains ample Study Material and Exhaustive Exercises with Numerous Multiple Choice Question with Answers.