Steel Structures Objective type Questions with Answers pdf – Set 18

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Q1. As per IS : 800, for compression flange, the outstand of flange plates should not exceed

(A) 12 t
(B) 16 t
(C) 20 t
(D) 25 t
Where ‘t’ = thickness of thinnest flange plate

Answer: (B) 16 t

Q2. The tensile strength of mild steel for bolts and nuts should not be less than

(A) 32 kg/mm2
(B) 36 kg/mm2
(C) 40 kg/mm2
(D) 44 kg/mm2

Answer: (D) 44 kg/mm2

Q3. The mechanism method and the statical method give

(A) Lower and upper bounds respectively on the strength of structure
(B) Upper and lower bounds respectively on the strength of structure
(C) Lower bound on the strength of structure
(D) Upper bound on the strength of structure

Answer: (B) Upper and lower bounds respectively on the strength of structure

(A) 60
(B) 70
(C) 80
(D) 100

Answer: (C) 80

(A) 40 %
(B) 50 %
(C) 60 %
(D) 70 %

Answer: (C) 60 %

Q6. When two plates are placed end to end and are joined by two cover plates, the joint is known as

(A) Lap joint
(B) Butt joint
(C) Chain riveted lap joint
(D) Double cover butt joint

Answer: (D) Double cover butt joint

Q7. For a cantilever beam of length ‘L’ continuous at the support and unrestrained against torsion at the support and free at the end, the effective length ‘l’ is equal to

(A) l = L
(B) l = 2L
(C) l = 0.5L
(D) l = 3L

Answer: (D) l = 3L

Q8. In double lacing, the thickness t of flat lacing is

(A) t < 1/40 th length between inner end rivets
(B) t < 1/50 th length between inner end rivets
(C) t < 1/60 th length between inner end rivets
(D) t < 1/70 th length between inner end rivets

Answer: (C) t < 1/60 th length between inner end rivets

Q9. For a standard 45° fillet, the ratio of size of fillet to throat thickness is

(A) 1 : 1
(B) 1 : √2
(C) √2 : 1
(D) 2 : 1

Answer: (C) √2 : 1

Q10. Hudson’s formula gives the dead weight of a truss bridge as a function of

(A) Bottom chord area
(B) Top chord area
(C) Effective span of bridge
(D) Heaviest axle load of engine

Answer: (A) Bottom chord area

(A) 0.67 L
(B) 0.8 L
(C) L
(D) 1.5 L

Answer:(B) 0.8 L

Q12. The strength of a riveted lap joint is equal to its

(A) Shearing strength
(B) Bearing strength
(C) Tearing strength
(D) Least of (a), (b) and (c)

Answer: (D) Least of (a), (b) and (c)

Q13. Pick up the correct statement from the following:

(A) When the gauge distance is larger than the pitch, the failure of the section may occur in a zig-zag line
(B) When the gauge distance is smaller than the pitch, the failure of the section may occur in a straight right angle section through the centre of rivet holes
(C) When the gauge distance and pitch are both equal, the failure to the section becomes more likely as the diameter of the holes increases
(D) All the above

Answer: (D) All the above

Q14. If M is the moment due to a couple in a bearing plate whose width is b and allowable bending stress is P, the thickness (t) of the bending plate of the column splice, is

(A) t = √[(b × p)/6M]
(B) t = √[6M/(b × p)]
(C) t = 6M/bp
(D) t = √6M/(b × p)

Answer: (B) t = √[6M/(b × p)]

Q15. The maximum spacing of vertical stiffeners is

(A) 1.33 d
(B) 1.25 d
(C) 1.5 d
(D) 1.75 d
Where ‘d’ is the distance between flange angles

Answer: (C) 1.5 d

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