Civil Engineering - Steel Structure

Question - 1

Two 10 mm thick plates are connected by lap joint to transmit a factored load and 100 kN using black bolts of 12mm diameter and grade 4.6.The minimum number of bolts required for safe design would be (Given \(f_{ u }\)=410 MPa)

  • A 3
  • B 4
  • C 5
  • D 6

Question - 2

A steel plate of rectangular section of size 90x8 mm is connected to a gusset plate by 4 bolts each having a shear capacity of 25 kN in holes having diameter of 13.5 mm If the ultimate tensile stress of material is 410 MPa the maximum tension that can be applied to the plate is (Take \(\Upsilon _{ m_{ 1 } }=1.25)\) 

  • A 90 kn
  • B 100 kN
  • C 151.1 Kn
  • D 170 KN

Question - 3

Two plates of thickness 10 mm and 12 mm are connected through lap joint using 20 mm diameter black bolts of grade 4.6 as shown in figure The efficiency of the lap joint will be
(Take \(f_{ u }=410\quad MPa,\Upsilon _{ m_{ 1 } }=1.25\) and  \(k_{ b }=0.5)\)

  • A 25%
  • B 30%
  • C 35%
  • D 40%

Question - 4

If diameter of a bolt is 22 mm, then maximum number of bolt (s) that can be accommodated in one row in 150 mm wide plate is (are)

  • A 1
  • B 2
  • C 3
  • D 6

Question - 5

If same number of bolts has been used in the joints then which of the following patterns will yield highest efficiency?

  • A Chain
  • B Staggered
  • C Diamond
  • D Staggered diamond

Question - 6

For reversal of stress the most suited bolt is

  • A black
  • B turned
  • C friction grip
  • D Ordinary

Question - 7

High strength bolts are designed on the basis of

  • A friction
  • B tension
  • C compression
  • D shear

Question - 8

A water tank is made with a 8 mm thick plates The plates are joined by single bolted lap joint using 16 mm diameter black bolts of grade 4.6 at a pitch of 50 mm.The efficiency of the joint would be
(Take \(\Upsilon _{ mb }=1.25,f_{ n }\) =410 MPa)

  • A 20.64%
  • B 39.54%
  • C 48.82%
  • D 64.12%

Question - 9

For the connection shown in the figure the bolt value will be

(Take diameter of bolt as 20 mm and grade 4.6)

  • A 35.7 KN
  • B 70.25 kN
  • C 135.7 kN
  • D 109.322 kN

Question - 10

Two steel plates each of 12 mm thickness are connected by double cover butt joint by bolts shown in the given figure if the bolt diameter is 22 mm with bolt value 53.15 kN and the ultimate tensile stress of plate is 410 MPa, which one of the following section is the most critical section for the cover plate?

  • A Section 1-1
  • B Section 2-2
  • C Section 3-3
  • D Both section 1-1 and section 2-2
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