1. The heaviest I-section for same depth is
a) ISMB
b) ISLB
c) ISHB
d) ISWB
a) net area and gross area
b) gross area and net area
c) net area in both cases
d) gross area in both cases
a) 120 mm
b) 160 mm
c) 200 mm
d) 300 mm
a) fully by direct bearing
b) fully through fastenings
c) 50% by direct bearing and 50% through fastenings
d) 75% by direct bearing and 25% through fastenings
a) only shear stresses
b) only tensile stresses
c) both (a) and (b)
d) none of the above
a) is at the maximum distance from CG of the rivet group
b) is at the minimum distance from CG of the rivet group
c) gives the maximum angle between the two forces Fa and Fm
d) gives the minimum angle between the two forces Fa and Fm
where, Fa is the load shared by each rivet due to axial load and Fm is the shearing load due to moment in any rivet.
a) lap joint
b) butt joint with single cover plate
c) butt joint with double cover plates
d) none of the above
a) 1.0 mm
b) 1.5 mm
c) 2.0 mm
d) 2.5 mm
a) stronger
b) weaker
c) equally strong
d) any of the above
a) 16 mm
b) 20 mm
c) 24 mm
d) 27 mm
a) ISMB
b) ISLB
c) ISHB
d) ISWB
Ans: c
2. Bending compressive and tensile stresses respectively are calculated based ona) net area and gross area
b) gross area and net area
c) net area in both cases
d) gross area in both cases
Ans: b
3. If the thickness of thinnest outside plate is 10 mm, then the maximum pitch of rivets in tension will be taken asa) 120 mm
b) 160 mm
c) 200 mm
d) 300 mm
Ans: b
4. In a gusseted base, when the end of the column is machined for complete bearing on the base plate, then the axial load is assumed to be transferred to base platea) fully by direct bearing
b) fully through fastenings
c) 50% by direct bearing and 50% through fastenings
d) 75% by direct bearing and 25% through fastenings
Ans: c
5. When the axis of load lies in the plane of rivet group, then the rivets are subjected toa) only shear stresses
b) only tensile stresses
c) both (a) and (b)
d) none of the above
Ans: a
6. When the axis of load lies in the plane of rivet group, then the most heavily loaded rivet will be the one whicha) is at the maximum distance from CG of the rivet group
b) is at the minimum distance from CG of the rivet group
c) gives the maximum angle between the two forces Fa and Fm
d) gives the minimum angle between the two forces Fa and Fm
where, Fa is the load shared by each rivet due to axial load and Fm is the shearing load due to moment in any rivet.
Ans: d
7. Which of the following types of riveted joint is free from bending stresses ?a) lap joint
b) butt joint with single cover plate
c) butt joint with double cover plates
d) none of the above
Ans: c
8. The difference between gross diameter and nominal diameter for the rivets up to 25 mm diameter isa) 1.0 mm
b) 1.5 mm
c) 2.0 mm
d) 2.5 mm
Ans: b
9. As compared to field rivets, the shop rivets area) stronger
b) weaker
c) equally strong
d) any of the above
Ans: a
10. If the thickness of plate to be connected by a rivet is 16 mm, then suitable size of rivet as per Unwin's formula will bea) 16 mm
b) 20 mm
c) 24 mm
d) 27 mm
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