Design of Steel Structures Objective Questions

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Q1. When the depth of a plate girder is at least ‘n’ times the depth of vertical leg of the flange angles, the girder is known as deep plate girder, if ‘n’ is

(A) 2
(B) 4
(C) 6
(D) 8

Answer: (D) 8

Q2. The deflection of beams may be decreased by

(A) Increasing the depth of beam
(B) Increasing the span
(C) Decreasing the depth of beam
(D) Increasing the width of beam

Answer: (A) Increasing the depth of beam

Q3. The web crippling due to excessive bearing stress can be avoided by

(A) Increasing the web thickness
(B) Providing suitable stiffeners
(C) Increasing the length of the bearing plates
(D) None of the above

Answer: (C) Increasing the length of the bearing plates

Q4. 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

Answer: (A) Equilibrium condition

Q5. The moment-curvature relation at a plastic hinge is

(A) Linear
(B) Parabolic
(C) Constant moment for all curvatures
(D) Constant curvature for all moments

Answer: (C) Constant moment for all curvatures

Q6. Allowable working stress corresponding to the slenderness ratio of double angles placed back to back and connected to one side of a gusset plate, is reduced to

(A) 50 %
(B) 60 %
(C) 70 %
(D) 80 %

Answer:(D) 80 %

Q7. If the pitch is 6 cm and rivet value is 4 tonnes, the number of rivets required for a riveted connection carrying an eccentric load of 15 tonnes at a distance of 30 cm from the centre line, is

(A) 6
(B) 8
(C) 10
(D) 15

Answer: (B) 8

Q8. If the depth of the section of an upper column is smaller than the lower column

(A) Filler plates are provided with column splice
(B) Bearing plates are provided with column splice
(C) Filler plates and bearing plates are provided with column splice
(D) None of these

Answer: (D) None of these

Q9. The number of seismic zones in which the country has been divided is

(A) 3
(B) 5
(C) 6
(D) 7

Answer: (B) 5

Q10. In a grillage footing, the maximum shear force occurs at the

(A) Edge of grillage beam
(B) Centre of base plate
(C) Centre of grillage beam
(D) Centre of base plate

Answer: (B) Centre of base plate

Q11. If the thickness of plate to be connected by a rivet is 16 mm, then suitable size of rivet as per Unwin’s formula will be

(A) 16 mm
(B) 20 mm
(C) 24 mm
(D) 27 mm

Answer: (C) 24 mm

Q12. The critical stress on a column for elastic buckling given by Euler’s formula, is

(A) fc = π2E/(I/r)2
(B) fc = (I/r) 2/ πE
(C) fc = (I/r)/ πE
(D) fc = π2E/(I/r)

Answer: (A) fc = π2E/(I/r)2

Q13. The difference between gross diameter and nominal diameter for the rivets up to 25 mm diameter is

(A) 1.0 mm
(B) 1.5 mm
(C) 2.0 mm
(D) 2.5 mm

Answer: (B) 1.5 mm

Q14. A major beam in a building structure, is known as

(A) A girder
(B) A floor beam
(C) A main beam
(D) All the above

Answer: (D) All the above

Q15. Load factor is

(A) Always equal to factor of safety
(B) Always less than factor of safety
(C) Always greater than factor of safety
(D) Sometimes greater than factor of safety

Answer: (C) Always greater than factor of safety

Design of Steel Structures MCQ SET wise with Answers

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