Civil Steel Structures Design Objective Questions - Set 06 - ObjectiveBooks

# Practice Test: Question Set - 06

1. The maximum tensile and compressive bending stress in extreme fibres of rolled I-sections and channels on the effective section, is
(A) 1500 kg/cm2
(B) 1420 kg/cm2
(C) 1650 kg/cm2
(D) 2285 kg/cm2

2. When the ratio of the moment M to axial load P is greater than L/6, the resultant of the compressive bearing pressure which acts at a distance Y from one side, is given by
(A) y = (L/3) - (M/P)
(B) y = (L/2) - (P/M)
(C) y = (L/2) + (M/P)
(D) y = (L/3) + (M/P)

3. A circular column section is generally not used in actual practice because
(A) It is uneconomical
(B) It cannot carry the load safely
(C) It is difficult to connect beams to the round sections
(D) All of the above

4. The safe working pressure for a spherical vessel 1.5 m diameter and having 1.5 cm thick wall not to exceed tensile stress 50 kg/cm2, is
(A) 16 kg/cm2
(B) 18 kg/cm2
(C) 20 kg/cm2
(D) 22 kg/cm2

5. Rise of a Jack arch is kept about
(A) 1/2 to 1/3 of the span
(B) 1/3 to 1/4 of the span
(C) 1/4 to 1/8 of the span
(D) 1/8 to 1/12 of the span

6. Battening is preferable when the
(i) Column carries axial load only
(ii) Space between the two main components is not very large
(iii) Column is eccentrically loaded
The correct answer is
(A) Only (i)
(B) Only (iii)
(C) (i) and (ii)
(D) (ii) and (iii)

7. For a steel member of slenderness ratio 350, the allowable stress is 76 kg/cm2 if it is
(A) HTW grade of thickness exceeding 32 mm
(B) HT grade of thickness exceeding 45 mm
(C) HT grade of thickness not exceeding 45 mm
(D) All the above

8. The main type of butt joints, is a double cover
(A) Shear riveted joint
(B) Chain riveted joint
(C) Zig-zag riveted joint
(D) All the above

9. Bearing stiffener in a plate girder is used to
(A) Transfer the load from the top flange to the bottom one
(B) Prevent buckling of web
(C) Decrease the effective depth of web
(D) Prevent excessive deflection

10. The central deflection of a simply supported steel beam of length L with a concentrated load W at the centre, is
(A) WL3/3EI
(B) WL4/3EI
(C) WL3/48EI
(D) 5WL4/384EI

11. If d is the distance between the flange angles,
(A) Vertical stiffeners are provided in steel plate girders if the web is less than d/85
(B) Vertical stiffeners are provided in high tensile steel plate girders if the web is less than d/175
(C) Horizontal stiffeners are provided in steel plate girders if the web is less than d/200
(D) All the above

12. Area of openings for buildings of large permeability is more than
(A) 10% of wall area
(B) 20% of wall area
(C) 30% of wall area
(D) 50% of wall area

13. In case horizontal stiffeners are not used, the distance between vertical legs of flange angles at the top and bottom of a plate girder, is known as
(A) Overall depth
(B) Clear depth
(C) Effective depth
(D) None of these

14. Pick up the correct statement from the following:
(A) The steel beams placed in plain cement concrete, are known as reinforced beams
(B) The filler joists are generally continuous over three-supports only
(C) Continuous fillers are connected to main beams by means of cleat angles
(D) Continuous fillers are supported by main steel beams

15. The diameter of base of conical flare of a steel stack is
(A) Less than d
(B) Equal to d
(C) More than d
(D) Any of the above
Where ‘d’ is the diameter of the cylindrical part

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