2. (b) Of the area above the centroid axis
(c) Of the area below the centroid axis
(d) None
ANS: (d)
9. In the shear stress in beam formula
τ = VA’ Y-‘/I b, Y-‘ is the distance of centroid
(a) Of the entire area of the beam
(b) Of the area above the centroid axis
(c) Of the area above the fiber at distance ‘y’
(d) None
ANS: (c)
10. The ratio of maximum shear stress to
average shear stress in a beam of rectangular
section is
o (a) 1
o (b) 2
o (c) 3
o (d) None
ANS$:(d)
11. The ratio of maximum shear stress to
average shear stress in a beam of rectangular
section is
o (a) 1. 5
3. o (b) 2. 5
o (c) 3.5
o (d) None
ANS:(a)
12. The ratio of maximum shear stress to
average shear stress in a beam of circular
section is
o (a) 1/3
o (b) 2/3
o (c) 3/3
o (d) None
ANS:(d)
13. The ratio of maximum shear stress to
average shear stress in a beam of circular
section is
o (a) 4/3
o (b) 5/3
o (c) 6/3
o (d) None
ANS:(a)
14. The ratio of maximum shear stress to
average shear stress in a beam of triangular
section is
o (a) 1.5
4. o (b) 2.5
o (c) 3.5
o (d) None
ANS:(a)
15. The ratio of maximum shear stress to
average shear stress in a beam of triangular
section is
o (a) 1
o (b) 2
o (c) 3
o (d) None
ANS:(d)
16. The ratio of shear stress in the
lowermost fiber of a flange and the shear
stress in the uppermost fiber of a web is
o (a) >1
o (b) < 1
o (c) =1
o (d) None
ANS:(b)
17. Greater portion of shear force in a beam
of I-section is shared by
o (a) Lower flange
o (b) Upper flange
5. o (c) Web
o (d) None
ANS:(c)
18. Greater portionof bendingmoment ina beam of I-sectionis shared by
o (a) Flanges
o (b) Web
o (c) Equally by the flanges and the we
o (d) None
ANS: (a)
19. Shear center in case of a channel
section beam will lie
(a) Within the cross section
(b) Outside the cross section
(c) On the outer edge of the section
(d) None
ANS: (b)
20. Shear center in case of a I- section beam
will lie
o (a) Within the cross section
o (b) Outside the cross section
o (c) On the outer edge of the section
o (d) None
ANS: (a)
6. The direction of shear stress in a loaded beam is
(a) Horizontal
(b) Horizontal as well as vertical
(c) Vertical
(d) None
(Ans: b)
Shear stress in the beam acting on the cross section is
(a) Normal to the cross section
(b) Tangential to the cross section
(c) Neither normal nor tangential
(d) None
(Ans: b)
Shear stress variationis
(a) Linear
(b) Polynomial
(c) Parabolic
(d) None
(Ans: c)
For a beam of rectangular cross section, the ratio
τmax/ τav is
(a) 2
(b) 1
(c) 1.5
(d) None
(Ans: c)
Shear stress is zero at the
(a) Outermost fiber
(b) Central fiber
(c) Neither outermost nor central fiber
(d) None
(Ans: a)
Shear stress is maximum at the
7. (a) Outermost fiber
(b) Central fiber
(c) Neither outermost nor central fiber
(d) None
(Ans: b)
Shear stress in an I-section beam is maximum at the
(a) Outermost fiber
(b) At the junction of web and flange
(c) Central fiber
(d) None
(Ans: c)
For a beam of circular cross section, the ratio τmax/ τav is
(a) 2/3
(b) 5/3
(c) 4/3
(d) None
(Ans: c)
For a beam of triangular cross section, the ratio τmax/
τav is
(a) 3/2
(b) 4/2
(c) 5/2
(d) None
(Ans: a)
Shear stress causes
(a) Deformation
(b) Distortion
(c) Deformation as well as distortion
(d) None
(Ans: b)
Shear stress is given by the relation
8. (a) τ =V A y/I b
(b) τ =V A’ y’/I b
(c) τ =V (A +y)/I b
(d) None
ANS: (b)
Shear stress in a beam is given by
(a) M/I
(b) F/A
(c) M y/I
(d) None
ANS:(d)
Bending stress in a beam is given by
(a) M/I
(b) F/A
(c) M y/I
(d) None
ANS:(c)
Bending stress is maximum
(a) Centroid
(b) Extreme fiber
(c) Neither centroid nor extreme fiber
(d) None
Ans: (b)
9. Bending stress is zero at
(a) Centroid
(b) Extreme fiber
(c) Neither centroid nor extreme fiber
(d) None
Ans: (a
