ISRO Scientist/Engineer (Mechanical) 2023 Exam: Most Important Topics
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Are you ready to face the ISRO Scientist/Engineer (Mechanical) 2023 Exam on 17th December 2023? Covered all the important topics that can make a difference on D-Day? You might be wondering why you should focus on the important topics first or devote more time to them. After all, this is not a school or college exam. This is the ISRO Scientist/Engineer (Mechanical) exam, one of the most challenging engineering exams in India. But you see, every major exam has some topics that are more relevant and crucial for the specific post you are applying for. And these topics are almost always included in the question paper by the examiners. The ISRO exam is no different. That’s why we have prepared this article to help you identify the most important or scoring topics that will surely appear in the upcoming exam. So, get ready to discover those topics in this article and take a FREE Mock Test to assess your knowledge of them and learn how to master them in less time than you think.

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Also read: What is the Best Way to Crack the ISRO Scientists/Engineer Exam in the First Attempt?

Also read: ISRO Scientist/Engineer (Mechanical) 2023: 30 Days Mock Test Challenge & Important Topics

ISRO Scientist/Engineer Exam Pattern 2023

The exam will have two stages: a written test and an interview. The written exam will invite 80 questions covering specific disciplines and 15 questions on General Aptitude. The negative marking scheme involves the deduction of 1/3rd of marks for every wrong answer given.

Phases PaperQuestionsTime 
IWritten Test Part A: Specific Discipline80Time Duration: 120 minutes (2 Hours)
IIWritten Test Part B: General Aptitude15

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ISRO Scientist/Engineer (Mechanical)-Most Important Topics

Given below are the topics that you must give more importance to:

1-5Start by taking a FREE ISRO Scientist/Engineer (Mechanical) Mock Test & Cover All The Important Topics👈

Fluid Mechanics: 

Fluid properties; fluid statics, buoyancy, manometry, stability of floating bodies, forces on submerged bodies; fluid acceleration; differential equations of continuity and momentum; control-volume analysis of mass, momentum and energy


Impulse and reaction principles, Francis and Kaplan turbines, Pelton-wheel, velocity diagrams.

Engineering Materials

Structure and properties of engineering materials, phase diagrams, heat treatment, stress-strain diagrams for engineering materials. Casting, Forming and Joining Processes: Different types of castings, design of patterns, moulds and cores; solidification and cooling; riser and gating design. Plastic deformation and yield criteria; fundamentals of hot and cold working processes.

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Thermodynamic systems and processes; the behavior of ideal and real gases, zeroth and first laws of thermodynamics, calculation of work and heat in various processes; properties of pure substances.

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10-15Thermodynamics Applications:

Power Plant Engineering: 

Air and gas compressors; Boilers, Steam Turbine, vapour and gas power cycles, concepts of regeneration and reheat, Steam Powerplant, Steam Nozzel .

I.C. Engines: 

Air-standard Otto, IC Engine Performance and Testing, Engine Cooling and Lubrication, Diesel and dual cycles.

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Refrigeration and air-conditioning: 

Vapour and gas refrigeration and heat pump cycles; basic psychrometric processes, properties of moist air, psychrometric chart.

Strength of Materials: 

Stress and strain, elastic constants, Poisson’s ratio; Mohr’s circle for plane stress and plane strain; thin cylinders; shear force and bending moment diagrams; bending and shear stresses; deflection of beams; torsion of circular shafts.

Theory of Machines: 

Displacement, velocity and acceleration analysis of plane mechanisms; gears and gear trains; dynamic analysis of linkages; cams; flywheels and governors; balancing of reciprocating and rotating masses.

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Learn how to ace the ISRO Scientist/Engineer (Mechanical) exam by focusing on the most important topics that are guaranteed to appear in the question paper. Discover the secret to cracking the ISRO exam by mastering the crucial topics that are relevant for the specific post you are applying for. Find out how to prepare for the ISRO exam by identifying and devoting more time to the important topics that will surely be tested in the upcoming exam.

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ISRO Scientist/Engineer (Mechanical) 2023 Exam: Important Topics

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