A. 3t
B. 4t
C. 6t
D. 8t
✅ The correct answer is option B.
Design of Steel Structures MCQs
32. Minimum thickness of web in a plate girder, when the plate is accessible and also exposed to weather, is______________?
A. 5 mm
B. 6 mm
C. 8 mm
D. 10 mm
✅ The correct answer is option B.
33. Which of the following conditions is to be satisfied both in elastic and plastic analysis ?
A. equilibrium condition
B. yield condition
C. plastic moment condition
D. mechanism condition
✅ The correct answer is option A.
34. The allowable shear stress in the web of mild steel beams decreases with__________________?
A. decrease in h/t ratio
B. increase in h/t ratio
C. decrease in thickness
D. increase in height
✅ The correct answer is option B.
35. The number of seismic zones in which the country has been divided are_________________?
A. 3
B. 5
C. 6
D. 7
✅ The correct answer is option B.
36. The actual thickness of butt weld as compared to the thickness of plate is usually________________?
A. more
B. less
C. equal
D. none of the above
✅ The correct answer is option A.
37. 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
✅ The correct answer is option B.
38. Intermediate vertical stiffeners in a plate girder need be provided if the depth of web exceeds___________________?
A. 501
B. 851
C. 200 t
D. 2501
✅ The correct answer is option B.
39. The portal bracing in a truss bridge is used to_____________________?
A. transfer load from top of end posts to bearings
B. keep the rectangular shape of the bridge cross-section
C. stiffen the structure laterally
D. prevent the sidesway buckling of top chord
✅ The correct answer is option A.
40. According to IS:800, in the Merchant Rankine formula the value of imperfection index (n) is_______________?
A. 1.0
B. 1.4
C. 1.8
D. 2.0
✅ The correct answer is option B.