ECET PAPERS for S.M 2013-2015

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STRENGTH OF MATERIALS ECET PAPERS

ECET PAPERS FOR 'S.M' FOR THE YEARS 2013-2015 ARE AVAILABLE HERE FOR FREE.

ECET PAPER FOR 2013 :

 1. Hooks law holds good upto
    (a) Yield point                               (b) Proportional limit
    (c) Elastic point                             (d) Plastic limit

2. The value of Poisson's ratio always
    (a) Less than one                          (b) Greater than one
    (c) Equal to one                            (d) Can be anything

3. For a simply supported beam of span '1' subjected to a moment 'M' at the left support, the bending diagram will be                                     
    (a) Trapezium       (b) Parabola           (c) Rectangle    (d) Triangle

4. For a cantilever beam of span 6m subjected to a concentrated load 1 kN-m at the free end, the bending moment at the fixed end in anticlock wise   
    (a) zero                 (b) 3 kN-m            (c) 1 kN-m        (d) 4 kN-m

5. When a shaft is subjected to torsion, the shear stress induced in the shaft varies from    
    (a) Minimum at the centre to the maximum at the circumference
    (b) Maximum at the centre to the minimum at the circumference
    (c) Zero at the centre to the maximum at the circumference
    (d) Maximum at the centre to zero at circumference

KEY : 

 1.b        2. a      3. c        4. a     5.  c

ECET PAPER FOR 2014 :

1. Bulk modulus is
   (a) Inversely proportional to modulus of elasticity
   (b) One third of modulus of elasticity
   (c) Half the modulus of elasticity
   (d) Directly proportional to modulus of elasticity

2. The strength of a beam depends upon
   (a) Modulus of elasticity               (b) Bending moment
   (c) Section modulus                      (d) Radius of curvature

3. For a certain material Poisson's ratio is 0.25. Then the ratio of modulus elasticity to modulus of rigidity for the material is                       
   (a) 0.4                    (b) 2.5                       (c) 4                      (d) 0.5

4. A load of 1 kN suddenly acts on a bar with 0.8 cm^2 area of cross section and length 10 cm. The maximum stress developed in the bar is                    
   (a) 12.5 N/mm^2     (b) 25 N/mm^2          (c) 75 N/mm^2       (d) 125 N/mm^2

5.The strain energy in the bar under certain loading is 40 joules. The area of the bar is 400 mm^2 and length is 2m. The modulus of resilience in mm - N/mm^3
     (a) 0.05                  (b) 0.5                        (c) 5                        (d) 0.005   

6. The relation between shear force and bending moment                              
      (a) BM is the rate of change of SF
      (b) BM is the inverse of SF
      (c) SF is the inverse of BM
      (d) SF is the rate of change of BM

7. Within elastic limit in a loaded material, stress is                  
    (a) Directly proportional to strain        (b) Inversely proportional to strain
    (c) Equal to strain                                 (d) Zero
8. When equal and opposite forces are applied on a body tending to elongate it. then the stress developed is called                                            
    (a) Compressive stress                       (b) Shear stress
    (c) Hoop stress                                   (d) Tensile stress

9. If a material is having same properties in all directions, then it is called  
     (a) Isotropic material                       (b) Homogeneous material
     (c) Elastic material                          (d) Viscous material

10. Units for volumetric strain                                                
      (a) mm^3             (b) mm^2               (c) mm             (d) No units

11. The ratio of shear stress to shear   strain is called                         
     (a) Modulus of rigidity                     (b) Modulus of elasticity
     (c) Section modulus                          (d) Bulk modulus

12. Modular ratio of two materials is the ratio of
    (a) Modulus of elasticity to modulus of rigidity
    (b) Modulus of rigidity to modulus of elasticity
    (c) Bulk modulus of two materials
    (d) Modulus of elasticity of two materials

13. The modulus of elasticity of a material is 2 x 105 N/mm^2 and the moment of
    inertia is 108 mm^4. Then the flexural rigidity is       
    (a) 2.16 x 107 N - mm^2                      (b) 2.16 x 107 N/mm^2
    (c) 2.16 x 107 N - mm^6                      (d) 2.16 x 107 N-mm^4

14. A 300 mm long bar is subjected to an axial stress of 200 MPa and elongation is
    observed to be 3 mm. If the Poisson's ratio is 0.3, the lateral strain in the bar is
    (a) 0.3              (b) 0.03                 (c) 0.003                 (d) 3

KEY : 

 1.d        2. c       3. b         4. b       5.  b         6.d        7. a       8. d         9. a     10. d

11.a      12.d       13.a        14.c     

ECET PAPER FOR 2015 : 
                               
1.  Poissons ratio is the ratio of
    (a) Longitudinal stress to longitudinal strain
    (b) Lateral stress to longitudinal strain
    (c) Lateral strain to longitudinal strain
    (d) Lateral stress to longitudinal stress

2.  Factor of safety is the ratio of                           
    (a) Yield stress to working stress                (b) Ulitmate stress to yield stress
    (c) Ultimate load to yield load                    (d) Working stress to yield stress

3. A square bar of side 20 mm and length 2m is subjected to a pull of 10 kN. If the modulus of elasticity of the material of the bar is 2 x 105 N/mm^2. The elongation of the bar is 
    (a) 4 mm           (b) 1 mm              (c) 0.5 mm          (d) 0.25 mm

4. The relationship between Young's modulus (E), Modulus of rigidity (G) and Bulk modulus (K) in an elastic material is                   
   (a) E = 9KG/3K + G    (b) E =  3KG/3K + G        (c) E =9KG/9K + G        (d) E= 3KG/9K + G

5. For a simply supported beam on two end supports, the bending moment maximum 
     (a) Usually on the supports                       (b) Always at mid span
     (c) Where there is no shear force              (d) Where the deflection is maximum 

6.    A material which has the elastic constants identical in all directions is called as
      (a) Isotropic         (b) Homogeneous          (c) Elastic          (d) Ductile 

7.    Compared to bending deformation, shear deformation is                    
      (a) Large             (b) Small              (c) Very large           (d) Zero 
  
8.    Shear stress is maximum, where                                               
      (a) Bending stress is minimum                (b) Bending stress is maximum
      (c) Bending stress is zero                        (d) Bending stress is negative

 9.   For a triangular section, shear stress is maximum
      (a) At a height of H/4 from base                (b) At a height of  2H/3
      (c) At a height of H/3 base                       (d) At a height of H/2 base

 10. The number of equilibrium equations for a two dimensional system is
       (a) 6                (b) 3                   (d) 2              (d) 1

KEY : 

 1.c        2. a       3. d         4. a     5.  c       6.a        7. b       8. c         9. d       10. b

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