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Design of Steel Structures Quiz | Design of Steel Structures Multiple Choice Questions and Answers

Questions
1 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 be
A 16 mm
B 20 mm
C 24 mm
D 27 mm

Answer: 24 mm
2 As compared to field rivets, the shop rivets are
A stronger
B weaker
C equally strong
D any of the above

Answer: stronger
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3 The difference between gross diameter and nominal diameter for the rivets up to 25 mm diameter is
A 1.0 mm
B 1.5 mm
C 2.0 mm
D 2.5 mm

Answer: 1.5 mm
4 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

Answer: butt joint with double cover plates
5 When the axis of load lies in the plane of rivet group, then the most heavily loaded rivet will be the one which 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 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

Answer: gives the minimum angle between the two forces Fa and Fm
6 When the axis of load lies in the plane of rivet group, then the rivets are subjected to
A only shear stresses
B only tensile stresses
C both (a) and (b)
D none of the above

Answer: only shear stresses
7 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 plate
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

Answer: 50% by direct bearing and 50% through fastenings
8 If the thickness of thinnest outside plate is 10 mm, then the maximum pitch of rivets in tension will be taken as
A 120 mm
B 160 mm
C 200 mm
D 300 mm

Answer: 160 mm
9 Bending compressive and tensile stresses respectively are calculated based on
A net area and gross area
B gross area and net area
C net area in both cases
D gross area in both cases

Answer: gross area and net area
10 The heaviest I-section for same depth is
A ISMB
B ISLB
C ISHB
D ISWB

Answer: ISHB
11 For a standard 45° fillet, the ratio of size of fillet to throat thickness is
A 1:1
B 1 : V2
C V2 : 1
D 2: 1

Answer: V2 : 1
12 The effective length of a fillet weld should not be less than
A two times the weld size
B four times the weld size
C six times the weld size
D weld size

Answer: four times the weld size
13 In the cross-section of a weld, throat is the
A minimum dimension
B average dimension
C maximum dimension
D none of the above

Answer: minimum dimension
14 When the bolts are subjected to reversal of stresses, the most suitable type of bolt is
A black bolt
B ordinary unfinished bolt
C turned and fitted bolt
D high strength bolt

Answer: high strength bolt
15 Diameter of a bolt hole is usually taken as
A gross diameter of bolt
B nominal diameter + 1.5 mm
C nominal diameter + 2.0 mm
D nominal diameter of bolt

Answer: nominal diameter + 1.5 mm
16 Bolts are most suitable to carry
A shear
B bending
C axial tension
D shear and bending

Answer: axial tension
17 Select the correct statement
A Material cost of a rivet is higher than that of a bolt.
B Tensile strength of a bolt is lesser than that of a rivet.
C Bolts are used as a temporary fastenings whereas rivets are used as permanent fastenings.
D Riveting is less noisy than bolting.

Answer: Bolts are used as a temporary fastenings whereas rivets are used as permanent fastenings.
18 Efficiency of a riveted joint, having the minimum pitch as per IS : 800, is
A 40%
B 50%
C 60%
D 70%

Answer: 60%
19 Minimum pitch of the rivets shall not be less than where d is gross diameter of rivet
A 1.5 d
B 2.0 d
C 2.5 d
D 3.0 d

Answer: 2.5 d
20 By providing sufficient edge distance, which of the following failures of riveted joint can be avoided ?
A tension failure of the plate
B shear failure of the rivet
C shear failure of the plate
D crushing failure of the rivet

Answer: shear failure of the plate

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