QuestÁes 2-pages-7

Prévia do material em texto

(c) Neither outermost nor central fiber 
(d) None 
Answer: a 
 
32. Shear stress is maximum at the 
(a) Outermost fiber 
(b) Central fiber 
(c) Neither outermost nor central fiber 
(d) None 
Answer: b 
 
33. Shear stress in a I-section beam is maximum art the 
(a) Outermost fiber 
(b) At the junction of web and flange 
(c) Central fiber 
(d) None 
Answer: b 
 
34. For a beam of triangular cross section, the ratio τmax/ τav is 
(a) 3/2 
(b) 4/2 
(c) 5/2 
(d) None 
Answer: a 
 
35. Shear stress causes 
(a) Deformation 
(b) Distortion 
(c) Deformation as well as distortion 
(d) None 
Answer: b 
 
36. Variation of bending stresses in a beam have 
(a) Parabolic variation 
(b) Linear variation 
(c) Cubical variation 
(d) None 
Answer: b 
 
37. Bending stress will be least at the extreme fibres for 
(a) Maximum area of cross section 
(b) Maximum moment of inertia 
(c) Maximum section modulus 
(d) None 
Answer: c 
 
38. Moment of resistance of a beam should be 
(a) Greater than the bending moment 
(b) Less than the bending moment 
(c) Two times the bending moment 
(d) None 
Answer: a 
 
39. Variation of bending strain in a beam has 
(a) Parabolic variation 
(b) Linear variation 
(c) Cubical variation 
(d) None 
Answer: b 
 
40. Tensile and compressive stresses in a beam of symmetrical section are 
(a) σt = σc 
(b) σt > σc 
(c) σt