# Multiple Choice Questions on Steel Structure Design – Set 09

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## Q1. The economical depth d of a web plate in which allowable bearing stress is fb, and the maximum bending moment is M, as suggested by Rawater and Clark, is

(A) d = ∛(M/fb)
(B) d = 1.5 ∛(M/fb)
(C) d = 2.5 ∛(M/fb)
(D) d = 4.5 ∛(M/fb)

## Q2. 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

(A) 120 mm
(B) 160 mm
(C) 200 mm
(D) 300 mm

## Q4. 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: (B) Gross area and net area

(A) A = My/fr2
(B) A = My2/fr2
(C) A = My/fr
(D) A = My/f2r2

## Q6. The connection of one beam to another beam by means of an angle at the bottom and an angle at the top, is known as

(A) Unstiffened seated connection
(B) Stiffened seated connection
(C) Seated connection
(D) None of these

## Q7. The thickness ‘t’ of a single flat lacing should not be less than

(A) 1/30th length between inner end rivets
(B) 1/40th length between inner end rivets
(C) 1/50th length between inner end rivets
(D) 1/60th length between inner end rivets

Answer: (B) 1/40th length between inner end rivets

## Q8. 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

Answer: (B) 1.25 times the effective span

## Q9. The channels get twisted symmetrically with regard to its axis

(A) Parallel to flanges
(B) Parallel to web
(C) Perpendicular to flanges
(D) Perpendicular to web

## Q10. Minimum pitch of the rivets shall not be less than

(A) 1.5 d
(B) 2.0 d
(C) 2.5 d
(D) 3.0 d
Where d is gross diameter of rivet

## Q11. 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

## Q12. Bolts are most suitable to carry

(A) Shear
(B) Bending
(C) Axial tension
(D) Shear and bending

## Q13. Tongue plates are provided in a steel girder at

(A) The upper flange
(B) The lower flange
(C) The upper end of the web
(D) The upper and lower ends of the web

Answer: (D) The upper and lower ends of the web

## Q14. 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

Answer: (C) 2.0 mm for rivet diameter over 25 mm

## Q15. Rolled steel angle sections are classified as

(A) Equal angles
(B) Unequal angles
(C) Bulb angles
(D) All the above