Public Sector undertaking



PSUS (Public Sector undertaking) The government owned organization are known as public sector undertaking (PUSs) in India.

In a PSU 51% or more of the paid share are owned by the union government of India, or state governments, or both.

PSU’s may be classified as central public enterprises (CPSES), public sector fants (PSBS) or state level public enter prises (SLPES) and regularly provide various employment opportunities in various technical and management areas.

Maharatna PSU’s

The central public sector enterprises (CPSES) fulfilling the following criteria are eligible to be couriered for grant of maharatna status

(I) Having Navratna status.


(ii) Listed on Indian stock exchange with minimum prescribed public shareholding under SEBI regulations.


(iii) Average annual turnover of more than Rs. 25,000 crore, during the last 3 years.


(iv) Average annual net worth of more than Rs. 15,000 crore, during the last 3 years.


(v) Average annual net profit after tax of more than Rs. 5,000 crore, during the last 3 years.


(vi) Should have significant global presence/international operations.

Navratna PSU’s

The central public sector enterprises (CPSES) fulfilling the following criteria are eligible to be couriered for grant of Navratna status.

(i) net profit to net worth,

(ii) manpower cost to total cost of production/services,

(iii) profit before depreciation, interest and taxes to capital employed,

(iv) profit before interest and taxes to turnover,

(v) earning per share and

 (vi) inter-sectoral performance.

  1. Bharat Electronics
  2. Bharat Petroleum (BPCL)
  3. Container Corporation of India (CONCOR)
  4. Engineers India
  5. Hindustan Aeronautics
  6. Hindustan Petroleum (HPCL)
  7. Mahanagar Telephone Nigam (MTNL)
  8. National Aluminium Company (NALCO)
  9. National Buildings Construction Corporation (NBCC)
  10. National Mineral Development Corporation (NMDC)
  11. Neyveli Lignite Corporation
  12. Oil India
  13. Power Finance Corporation
  14. Power Grid Corporation of India
  15. Rashtriya Ispat Nigam (RINL)
  16. Rural Electrification Corporation
  17. Shipping Corporation of India

Miniratna PSUS


The central public sector enterprises (CPSES) made profit in the last three years continuously and have positive net worth are eligible to be considered for grant of miniratna status.

List of Miniratna-I
List of Miniratna-II
  1. Bharat Pumps & Compressors
  2. Broadcast Engineering Consultants India
  3. Central Mine Planning and Design Institute
  4. Central Railside Warehouse Company
  5. Educational Consultants India
  6. Engineering Projects
  7. FCI Aravali Gypsum and Minerals (India) Limited
  8. Ferro Scrap Nigam Ltd
  9. HMT (International) Ltd
  10. Indian Medicines & Pharmaceuticals Corporation Limited
  11. MECON
  12. Mineral Exploration Corporation Ltd
  13. National Film Development Corporation of India
  14. National Small Industries Corporation
  15. PEC Ltd
  16. Rajasthan Electronics & Instruments Ltd

Exam pattern

  • 30% – 40%: Nontechnical subjects
  • 60%-70%: Technical subject

Nanotech subjects

(i) English

(ii) Maths (only Airthematic)

(iii) Reasoning

(iv) General Awareness

  • Geography
  • Polity
  • History
  • Economics
  • Biology
  • Physics
  • Chemistry

Technical Subjects





Engineering Mechanics

Soil Mechanics

Circuit theory

Physical Electronics, Electron

Strength of Material

Building Materials

Measurements & Instrumentations

Electronics Devices and ICs devices

Theory of Machines

Estimating Costing and Valuation

Electric Machines

Signals and System

Machine Design


Power System

Network theory

Basics Thermodynamics


Utilization of Electrical Engineering

Electromagnetic Theory

Internal Combustion Engine

Irrigation Engineering

Basic Electronics

Electronic Measurements and instrumentation

Power Plant Engineering

Transportation Engineering

Estimation & Costing

Analog Electronic

Fluid Mechanics & Machinery

Environmental Engineering

Control System

Digital Electronic Circuits

Production Process

Theory of Structure

Power Electronics

Control Systems

Refrigeration and Air Conditioning

Concrete Technology

Analog Electronics


Heat and Mass Transfer

R.C.C. Design

Digital Electronics


Industrial Engineering

Steel Design



Basics of CIM/CAD/CAM

Structural Engineering



Measurement and Metrology


Electronic Devices & Circuits