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➤Total Question: 30 MCQ
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1. The heaviest I-section for same depth
ISMB
ISLB
ISHB
ISWB
2. Bending compressive and tensile stresses respectively are calculated based on
net area and gross area
gross area and net area
net area in both cases
gross area in both cases
3. If the thickness of thinnest outside plate is 10 mm, then the maximum pitch of rivets in tension will be taken as
120 mm
160 mm
200 mm
300 mm
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 plate
fully by direct bearing
fully through fastenings
50% by direct bearing and 50% through fastenings
75% by direct bearing and 25% through fastenings
5. When the axis of load lies in the plane of rivet group, then the rivets are subjected to
only shear stresses
only tensile stresses
both ( a) and ( b)
none of the above
6. When the axis of load lies in the plane of rivet group, then the most heavily loaded rivet will be the one which
is at the maximum distance from CG of the rivet group
is at the minimum distance from CG of the rivet group
gives the maximum angle between the two forces Fa and Fm
gives the minimum angle between the two forces Fa and Fm
7. Which of the following types of riveted joint is free from bending stresses
lap joint
butt joint with single cover plate
butt joint with double cover plates
none of the above
8. The difference between gross diameter and nominal diameter for the rivets up to 25 mm diameter is
1.0 mm
1.5 mm
2.0 mm
2.5 mm
9. As compared to field rivets, the shop rivets are
stronger
weaker
equally strong
any of the above
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 be
16 mm
20 mm
24 mm
27 mm
11. By providing sufficient edge distance, which of the following failures of riveted joint can be avoided ?
tension failure of the plate
shear failure of the rivet
shear failure of the plate
crushing failure of the rivet
12. Minimum pitch of the rivets shall not be less than
1.5 d
2.0 d
2.5 d
3.0 d
13. Efficiency of a riveted joint, having the minimum pitch as per IS : 800, is
40%
50%
60%
70%
14. Select the correct statement
Material cost of a rivet is higher than that of a bolt.
Tensile strength of a bolt is lesser than that of a rivet
Bolts are used as a temporary fastenings whereas rivets are used as permanent fastenings
Riveting is less noisy than bolting.
15. Bolts are most suitable to carry
shear
bending
axial tension
shear and bending
16. Diameter of a bolt hole is usually taken as
gross diameter of bolt
nominal diameter + 1.5 mm
nominal diameter + 2.0 mm
nominal diameter of bolt
17. When the bolts are subjected to reversal of stresses, the most suitable type of bolt is
black bolt
ordinary unfinished bolt
turned and fitted bolt
high strength bolt
18. In the cross-section of a weld, throat is the
minimum dimension
average dimension
maximum dimension
none of the above
19. The effective length of a fillet weld should not be less than
two times the weld size
four times the weld size
six times the weld size
weld size
20. For a standard 45° fillet, the ratio of size of fillet to throat thickness is
1:1
1 : V2
V2 : 1
2: 1
21. A butt weld is specified by
effective throat thickness
plate thickness
size of weld
penetration thickness
22. The actual thickness of butt weld as compared to the thickness of plate is usually
more
less
equal
none of the above
23. According to IS Specifications, the maximum pitch of rivets in compression is
lesser of 200 mm and 12 t
lesser of 200 mm and 161
lesser of 300 mm and 32 t
lesser of 3 00 mm and 24 t
24. A circular column section is generally not used in actual practice because
it is uneconomical
it cannot carry the load safely
it is difficult to connect beams to the round sections
all of the above
25. The slenderness ratio of a column supported throughout its length by a masonry wall is
zero
10
100
infinity
26. According to IS Specifications, the effective length of a column effectively held in position at both ends and restrained in direction at one end is taken as
0.67 L
0.8 L
L
1.5 L
27. The effective length of a battened strut effectively held in position at both ends but not restrained in direction is taken as
1.8 L
L
1.1 L
1.5 L
28. The maximum slenderness ratio of a compression member carrying both dead and superimposed load is
180
200
250
350
29. The maximum slenderness ratio of a steel column, the design of which is governed by wind or seismic forces is
150
180
250
350
30. According to IS:800, in the Merchant Rankine formula the value of imperfection index (n) is
1.0
1.4
1.8
2.0
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