21. A flat carrying a pull of 69C kN is con-nected to a gusset plate using rivets. If the pulls required to shear the rivet, to crush the rivet and to tear the plate per pitch length are 68.5 kN, 46 kN and 69 kN respectively, then the number of rivets required is
a) 10
b) 12
c) 15
d) 20
Ans: c
22. If the rivet value is 16.8 kN and force in the member is 16.3 kN, then the number of rivets required for the connection of the member to a gusset plate is
a) 1
b) 2
c) 3
d) 4
Ans: b
23. At a point in a strained body carrying two unequal unlike principal stresses pi and p2 (Pi > P2X the maximum shear stress is given by
a) p,/2
b) p2/2
c) (p,-p2)/2
d) (p, + p2)/2
Ans: d
24. If a point in a strained material is subjected to equal normal and tangential stresses, then the angle of obliquity is
a) 0°
b) 45°
c) tan"1 (1/2)
d) tan"1 (2)
Ans: b
25. If a prismatic member with area of cross-section A is subjected to a tensile load P, then the maximum shear stress and its inclination with the direction of load respectively are
a) P/A and 45°
b) P/2Aand45°
c) P/2A and 60°
d) P/A and 30°
Ans: b
26. The sum of normal stresses is
a) constant
b) variable
c) dependent on the planes
d) none of the above
Ans: a
27. The radius of Mohr's circle for two equal unlike principal stresses of magnitude p is
a) p
b) p/2
c) zero
d) none of the above
Ans: a
28. Shear stress on principal planes is
a) zero
b) maximum
c) minimum
d) none of the above
Ans: a
29. The state of pure shear stress is produced by
a) tension in one direction and equal compression in perpendicular direction
b) equal tension in two directions at right angles
c) equal compression in two directions at right angles
d) none of the above
Ans: a
30. According to Rankine's hypothesis, the criterion of failure of a brittle material is
a) maximum principal stress
b) maximum shear stress
c) maximum strain energy
d) maximum shear strain energy
Ans: a
a) 10
b) 12
c) 15
d) 20
Ans: c
22. If the rivet value is 16.8 kN and force in the member is 16.3 kN, then the number of rivets required for the connection of the member to a gusset plate is
a) 1
b) 2
c) 3
d) 4
Ans: b
23. At a point in a strained body carrying two unequal unlike principal stresses pi and p2 (Pi > P2X the maximum shear stress is given by
a) p,/2
b) p2/2
c) (p,-p2)/2
d) (p, + p2)/2
Ans: d
24. If a point in a strained material is subjected to equal normal and tangential stresses, then the angle of obliquity is
a) 0°
b) 45°
c) tan"1 (1/2)
d) tan"1 (2)
Ans: b
25. If a prismatic member with area of cross-section A is subjected to a tensile load P, then the maximum shear stress and its inclination with the direction of load respectively are
a) P/A and 45°
b) P/2Aand45°
c) P/2A and 60°
d) P/A and 30°
Ans: b
26. The sum of normal stresses is
a) constant
b) variable
c) dependent on the planes
d) none of the above
Ans: a
27. The radius of Mohr's circle for two equal unlike principal stresses of magnitude p is
a) p
b) p/2
c) zero
d) none of the above
Ans: a
28. Shear stress on principal planes is
a) zero
b) maximum
c) minimum
d) none of the above
Ans: a
29. The state of pure shear stress is produced by
a) tension in one direction and equal compression in perpendicular direction
b) equal tension in two directions at right angles
c) equal compression in two directions at right angles
d) none of the above
Ans: a
30. According to Rankine's hypothesis, the criterion of failure of a brittle material is
a) maximum principal stress
b) maximum shear stress
c) maximum strain energy
d) maximum shear strain energy
Ans: a
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