NPCIL exam will be based on two tests. These are Management & General Aptitude Test and Functional Knowledge Test:

Management & General Aptitude Test
English language
Aptitude test
Logical reasoning
Data interpretation
Analytical reasoning

Functional Knowledge Test

Syllabus of NPCIL paper:
NPCIL Executive Trainee Syllabus for Common Engineering Subjects

Engineering Mechanics.
Engineering Drawing.
Mechanics of Solids.
Engineering Materials.
Energy Conversion.
Engineering Economy & Management.
Environment Engineering.
Surveying.
Electrical Measuring Instrumentation etc.

NPCIL Executive Trainee Syllabus for Medical Officer

Anatomy.
Biochemistry.
Physiology.
Microbiology.
Forensic Medicine & Toxicology.
Pharmacology.
Pathology.
Community Medicine.
Anaesthesiology.
Medicine.
Dermatology & Venereology.
Ophthalmology.
Obstetrics & Gynaecology.
Paediatrics.
Orthopaedics.
Surgery etc.

NPCIL Executive Trainee Syllabus 2015 NPCIL Executives Exam Pattern NPCIL Executive Trainee Syllabus for Manager

Management Aptitude Test.
Quantitative Aptitude.
Verbal Reasoning.
Non Verbal Reasoning.
English Language.
Data interpretation.
General Awareness.
Functional Knowledge Test related to discipline.