Code No: 53003 Set No. 1

JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD II B.Tech. I Sem., I Mid-Term Examinations, August – 2012

STRENGTH OF MATERIALS – I Objective Exam

Name: ______________________________ Hall Ticket No.

Answer All Questions. All Questions Carry Equal Marks.Time: 20 Min. Marks: 10. A

I Choose the correct alternative: 1. Modulus of Elasticity is the ratio of [ ]

a) Stress to strain b) stress to original length c) deformation of original length d) all of these

2. The term deformation per unit length is applied for [ ]

a) stress b) modules of elasticity c)strain d)none of these

3. When a section is subjected to two equal and opposite pulls and the body tends to ___________ it’s length [ ] a) Increase b) decrease c) constant d)none

4. Point of contraflexture is a point where _______________ [ ]

a) Shear force changes sign b) bending moment changes sign c) SF is maximum d) BM is maximum

5. An anticlockwise moment causes __________ SF over the beam [ ]

a) Zero b)Positive c) negative d)none

6. The term _________ used for the total strain energy stored in a body [ ] a) Proof resilience b) modulus of resilience c) resilience d) All of the above

7. The neutral axis of a section is an axis, at which the blending stress is ____________ [ ]

a) Zero b) Maximum c) Minimum d) Infinity 8. When a cantilever is loaded at its free and maximum compressive stress shall develop at [ ]

a) Top fiber b)Neutral axis c) Bottom fiber d) Centre of gravity

9. An inverted T section is subjected to a SF ‘F’. The maximum shear stress will occur at [ ] a) top of the section b) junction of web and flange c) neutral axis of the section d) none

10. The ratio of τ max /τ avg for a rectangular section is [ ] a)1 b) 0 c) 1.5 d) 2.0

Cont……2

www.jntuworld.com

www.jntuworld.com

www.jwjobs.net

Code No: 53003 :2: Set No. 1

II Fill in the blanks: 11. As the body undergoes deformation , its molecules set up some ___________ to deformation

12. When the load is applied suddenly the load (p) is ___________ throughout the process of deformation of

the bar

13. While calculating bending moment or SF of a section the beam will be assumed to be __________ 14. The _____________ beam is the beam with one end free and other end fixed

15. The maximum bending moment will occur at M, where _________ changes sign

16. If there is a sudden increase or decrease in the shear force diagram, it indicates that there is a ______

load or __________ at that point

17. The value of ______________ is same in tension and compression

18. In a cantilever, there is a _____________ stress above the neutral axis

19. In the theory of simply bending, the bending stress in the beam section varies_________

20. If the section is not symmetrical about x-x axis , the ___________ distribution diagram will also not be symmetrical

-oOo-

www.jntuworld.com

www.jntuworld.com

www.jwjobs.net