Steel Structures Design Multiple Choice Tests - Set 08 - ObjectiveBooks

# Practice Test: Question Set - 08

1. For steel members exposed to weather and not accessible for repainting, the thickness of steel should not be less than
(A) 4.5 mm
(B) 6 mm
(C) 8 mm
(D) 10 mm

2. The slenderness ratio of a column supported throughout its length by a masonry wall is
(A) Zero
(B) 10
(C) 100
(D) Infinity

3. The main assumption of the method of simple design of steel frame work, is:
(A) Beams are simply supported
(B) All connections of beams, girders and trusses are virtually flexible
(C) Members in compression are subjected to forces applied at appropriate eccentricities
(D) All the above

4. Outstanding length of a compression member consisting of a channel, is measured as
(A) Half of the nominal width
(B) Nominal width of the section
(C) From the edge to the first row of rivets
(D) None of these

5. The use of tie plates in laced columns is
(A) Prohibited
(B) Not prohibited
(C) Permitted at start and end of lacing system only
(D) Permitted between two parts of the lacing

6. According to IS : 800-1962 the permissible bending stress in steel slab plates, is
(A) 1500 kg/cm2
(B) 1420 kg/cm2
(C) 2125 kg/cm2
(D) 1890 kg/cm2

7. The side thrust T on the tie rods provided at the end beam of jack arch of rise R, is calculated from the formula
(A) T = WL/4R
(B) T = WR/8L
(C) T = WL/8R
(D) T = WL/2R

8. Intermediate vertical stiffeners in a plate girder need be provided if the depth of web exceeds
(A) 50 t
(B) 85 t
(C) 200 t
(D) 250 t
Where ‘t’ is thickness of web

9. The minimum pitch of rivet holes of diameter d should not be less than
(A) d
(B) 1.25 d
(C) 1.5 d
(D) 2.5 d

10. Design of a riveted joint, is based on the assumption:
(A) Load is uniformly distributed among all the rivets
(B) Shear stress on a rivet is uniformly distributed over its gross area
(C) Bearing stress in the rivet is neglected
(D) All the above

11. For the buildings having a low permeability, the internal wind pressure acting normal to the wall and roof surfaces is taken as
(A) Zero
(B) ± 0.2 p
(C) ± 0.5 p
(D) ± 0.7 p
Where ‘p’ is basic wind pressure

12. If ‘f’ is the maximum allowable bending stress in a tension member whose radius of gyration is ‘r’ and depth is 2y, the required cross sectional area ‘A’ is given by
(A) A = My/fr2
(B) A = My2/fr2
(C) A = My/fr
(D) A = My/f2r2

13. The load on a lintel is assumed as uniformly distributed if the height of the masonry above it, is up to a height of
(A) The effective span
(B) 1.25 times the effective span
(C) 1.50 times the effective span
(D) 2.0 times the effective span

14. Maximum pitch of rivets, used in steel stacks, is limited to
(A) 6 t
(B) 10 t
(C) 12 t
(D) 16 t
Where ‘t’ is thickness of thinner plate being connected

15. Diameter of a rivet hole is made larger than the diameter of the rivet by
(A) 1.0 mm for rivet diameter upto 12 mm
(B) 1.5 mm for rivet diameter exceeding 25 mm
(C) 2.0 mm for rivet diameter over 25 mm
(D) None of these

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