Civil Steel Structural Engineering MCQ - Set 13 - ObjectiveBooks

# Practice Test: Question Set - 13

1. If the area of cross-section of a single angle discontinuous strut is 30 cm2 and allowable working stress corresponding to its slenderness ratio is 625 kg/cm2, the safe load carrying capacity of the member, is
(A) 10 tonnes
(B) 12 tonnes
(C) 15 tonnes
(D) 18 tonnes

2. The ratio of plastic section modulus to elastic section modulus
(A) Is equal to 1
(B) Is always less than 1
(C) Is always greater than 1
(D) Can be less than 1

3. Bulb angles are used in
(A) Column building
(B) Bridge building
(C) Ship building
(D) Water tank building

4. The diameter of a bolt hole is taken as the nominal diameter of the bolt plus
(A) 1.0 mm
(B) 1.2 mm
(C) 1.4 mm
(D) 1.6 mm

5. The minimum thickness of a steel plate, which is directly exposed to weather and is not accessible for cleaning and repainting, should be:
(A) 4.5 mm
(B) 6 mm
(C) 8 mm
(D) 10 mm

6. For determination of allowable stress in axial compression, Indian Standard Institution has adopted
(A) Euler's formula
(B) Rankine formula
(C) Perry Robertson formula
(D) Secant formula

7. Rolled steel beams are:
(A) Mainly used to resist bending stress
(B) Used as independent sections to resist compressive stress
(C) Used as independent sections to resist tensile stress
(D) All the above

8. When the axis of load lies in the plane of rivet group, then the most heavily loaded rivet will be the one which
(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.

9. According to IS : 800 - 71, the minimum thickness of a vertically stiffened web plate, shall not be less than
(A) d/85
(B) d/200
(C) d/225
(D) d/250

10. A web plate is called unstiffened if the ratio of clear depth to thickness is less than
(A) 35
(B) 50
(C) 65
(D) 85

11. A butt weld is specified by
(A) Effective throat thickness
(B) Plate thickness
(C) Size of weld
(D) Penetration thickness

12. The most economical section for a column, is
(A) Rectangular
(B) Solid round
(C) Flat strip
(D) Tubular section

13. In rolled steel beams, shear force is mostly resisted by
(A) Web only
(B) Flanges only
(C) Web and flanges together
(D) None of these

14. If the 20 mm rivets are used in lacing bars, then the minimum width of lacing bar should be
(A) 40 mm
(B) 60 mm
(C) 80 mm
(D) 100 mm

15. The minimum edge distance of a rivet line connecting two or more plates, is kept equal to 37 mm plus (where t is the thickness in mm of the thinner outside plate).
(A) 2 t
(B) 4 t
(C) 6 t
(D) 8 t

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