Skip to main content

Analysis of ISRO Mechanical Question Papers from 2006 to 2018

Analysis of ISRO Mechanical Question Papers from 2006 to 2018

Average number of questions in each subject over each year

Engineering Mathematics                                   - 8.2 (10.3%)
Engineering Mechanics                                       - 7.9 (9.8%)
Strength of Materials                                           - 11.2 (14.0%)
Fluid Mechanics                                                  - 11.6 (14.5%)
Thermal Engineering                                           - 10.7 (13.4%)
Heat Transfer                                                       - 6.6 (8.2 %)
Theory of Machines and Mechanical Vibrations - 5.3 (6.6%)
Design of Machine Elements                               - 2.0 (2.5%)
Material Science                                                   - 4.9 (6.1%)
Manufacturing Technology                                  - 11.7 (14.6%)


Test held on 2014

Interview held on
-47 selected for offer
-10 waiting list

Test held on 11.10.2015
Top Mark - 173
Cut off Mark - 131

Test held on 22.04.2018
Mark 140 - Rank ~3000 (It was the easiest question paper in recent times)
Number of people selected for interview 382 (for 45 vacancies)

List of Questions, Answers and Explanation available in this blog
1. Previous Years Question Papers (General)
2. 2006 Questions, Answers and Explanation 2/80
3. 2007 Questions, Answers and Explanation 3/80
4. 2008 Questions, Answers and Explanation 1/80
5. 2009 Questions, Answers and Explanation 1/80
6. 2010 Questions, Answers and Explanation 1/80
8. 2011 Questions, Answers and Explanation 4/80
9. 2012 Questions, Answers and Explanation 1/80
10. 2013 Questions, Answers and Explanation 1/80
11. 2014 Questions, Answers and Explanation 2/80
12. 2015 Questions, Answers and Explanation 1/80
12. 2016 Questions, Answers and Explanation 1/80
13. May 2017 Questions, Answers and Explanation
14. December 2017, Questions, Answers and Explanation 34/80
15. 2018 Questions, Answers and Explanation 16/80
Subject wise Questions, Answers and Explanation available in this blog
Engineering Mathematics 5/115
Engineering Mechanics 6/110
Strength of Materials 5/157
Fluid Mechanics 18/162
Thermal Engineering 14/149
Heat Transfer 2/92
Theory of Machines and Mechanical Vibrations 4/74
Material Science 8/69
Manufacturing Technology 5/164

Popular posts from this blog

The Da Vinci Code trip

Chapter I of the novel begins with Robert Langdon asleep in the Ritz Hotel. Our trip begins with ourselves just outside the Ritz Hotel. One of the posh hotels with a lot of high end luxury cars parked outside. Ritz Hotel, Paris Sitting up now, Langdon frowned at his bedside Guest Relations Handbook, whose cover boasted:     SLEEP LIKE A BABY IN THE CITY OF LIGHTS. SLUMBER AT THE PARIS RITZ. In the beginning on his way to Louvre - The crisp April air whipped through the open window of the Citroën ZX as it skimmed south past the Opera House and crossed Place Vendôme . As the Citroën accelerated southward across the city, the illuminated profile of the Eiffel Tower appeared, shooting skyward in the distance to the right. Symbologists often remarked that France—a country renowned for machismo, womanizing, and diminutive insecure leaders like Napoleon and Pepin the Short—could not have chosen a more apt national emblem than a thous...
Read more

ISRO 2017 December Mechanical Questions, Answers and Explanation

ISRO 2017 December Mechanical Questions, Answers and Explanation Question Set E 1. The specific metal cutting energy is expressed as a)  τ cos(β - α) ⁄ sin φ cos(φ+β-α) b)  τ sin(β - α) ⁄ sin φ cos(φ-β+α) c)  τ cos(α - β) ⁄ sin φ cos(φ-β+α) d)  τ sin(α - β) ⁄ sin φ cos(φ+β-α) where  α is rake angle,   β is friction angle,  φ is shear angle and    τ is the shear stress. Answer a)    τ cos(β - α) ⁄ sin φ cos(φ+β-α) Explanation [ Manufacturing Technology ] Specific metal cutting energy is defined as the energy expended in removing a unit volume of work-piece material.  = Energy/Volume Removed Energy = Force of cut x velocity of tool Volume Removed = Velocity of tool x Width of cut x Depth of cut Specific metal cutting energy = Force of cut/(Width of cut x Depth of cut) Shear force = shear stress x Area of shear  =  τ  x width of cut x depth of cut /sin  φ Shear force/Force of cut ...
Read more

ISRO Mechanical Strength of Materials Questions, Answers and Explanation

Strength of Materials Simple Stresses and Strains 2017.2.9.  Which of the following is true for ductile materials? a) Engineering stress – strain curve cannot have negative slope b) Most applicable failure theory is maximum principal stress theory c) Ultimate strain is the strain at ultimate stress d) Strain hardening is represented by a negative slope in engineering stress strain curve Answer c)  Ultimate strain is the strain at ultimate stress Explanation  Principal stress theory is applicable for brittle materials. Elastic Constants 2017.2. 2.  For isotropic materials, the modulus of Elasticity in tension and shear (E and G) are related to the Poisson's ratio (&nu) as follows a) E = G/(2(1+ν)) b) G = E/(2(1+ν)) c) G = E/(2(1-ν)) d) E = G/(2(1-ν)) Answer b) G = E/(2(1+ν)) Explanation Derivation of relation between Modulus of elasticity in tension and shear Torsion 2017.2.76.  A 3m l...
Read more