Civil engineer objective questions – Structural Analysis and Design (Section-17)

1) The principle of virtual work can be applied to an elastic system by considering the virtual work of_____?

a) Internal forces only

b) External forces only

c) Internal as well as external forces

d) None of the above

2) The number of independent displacement components at each joint of a rigid-jointed space frame as_____?

a) 1

b) 2

c) 3

d) 6

3) The degree of static indeterminacy of a rigid-jointed space frame is_____?

a) M+r-2j

b) M+r-3j

c) 3m+r-3j

d) 6m+r-6j

4) The number of independent equations to be satisfied for static equilibrium in a space structure is_____?

a) 2

b) 3

c) 4

d) 6

5) A pin-jointed plane frame is suitable if____?

a) (m+r)<2j

b) M+r=2j

c) (m+r)>2j

d) None of the above

6) Independent displacement components at the each joint of a rigid-jointed plane frame are____?

a) Three linear movements

b) Two linear movements and one rotation

c) One linear movement and two rotation

d) Three rotations

7) Degree of static indeterminacy of a rigid-jointed plane frame having 15 members,3 reaction components and 14 joints is_____?

a) 2

b) 3

c) 6

d) 8

8) If there are m unknown member forces, r unknown reaction components and j number of joints, then the degree of static indeterminacy of a pin-jointed plane frame is given by____?

a) M+r+2j

b) M-r+2j

c) M+r-2j

d) M+r-3j

9) The number of independent equations to be satisfied for static equilibrium of a plane structure is____?

a) 1

b) 2

c) 3

d) 6

 10) In the slope deflection equations, the deformations are considered to be caused by_____?

1. Bending moment

2. Shear force

3. Axial force

The correct answer is

a) Only 1

b) 1 and 2

c) 2 and 3

d) 1,2 and 3

11) To generate the j the column of the flexibility matrix____?

a) A unit force is applied at coordinate j and the displacements are calculated at all coordinates

b) A unit displacement is applied at co-ordinate j and the forces are calculated at all coordinates

c) A unit forces is applied at coordinate j and the forces are calculated at all coordinate

d) A unit displacement is applied at co-ordinate j  and the displacements are calculated at all coordinate

12) Removal of props under____?

a) Slabs spanning upto 4.5 m is 14 days

b) Beams spanning upto 6 m is 14 days

c) Slabs spanning upto 4.5 m is 7 days

d) All the above

13) The spans of filler joists supporting a slab may be considered approximately equal if the longest span does not exceed the shortest span more than___?

a) 5%

b) 10%

c) 15%

d) 25%

14) All reinforcement should be free from___?

a) Paints

b) Loose rust

c) Loose mill scales

d) All of the above

15) The permissible bending stresses pbet for steel slab bases should not exceed_____?

a) 1500 kg/cm2

b) 1650 kg/cm2

c) 1800 kg/cm2

d) 1890 kg/cm2

16) Pick up the correct statement from the following?

a) For steel castings, the minimum tensile strength is 41 kg/mm2 and minimum yield stress is 20.5 kg/mm2

b) For high tensile steel, the minimum tensile strength is 58 kg/mm2

c) For mild steel the minimum tensile strength is 44 kg/mm2 and minimum elongation of 23% on a gauge length of 5.65A

d) All of the above

17) The anchorage value of standard U-type hook of a reinforcing bar of diameter d in tension, is_____?

a) 4 d

b) 8 d

c) 12 d

d) 16 d

18) Pick up the correct statement from the following?

a) The diameter of a rivet, before driving is taken as the nominal diameter of the rivet

b) The diameter of river hole is taken as the gross area of the rivet

c) For rivets of nominal diameters less than 25 mm, the diameter of the river hole is taken as the nominal diameter of the rivet plus 1.5 mm

d) All of the above

19) Pick up the correct statement from the following?

a) The minimum pitch of rivets should not be less than 2.5 times the diameter of the rivet hole

b) The distance between centre of two adjacent rivets in line with the direction of stress shall not

c) The distance between the centre of two adjacent rivets in line with the direction of stress shall not exceed 12 or 203 mm whichever is less in compression members

d) All of the above

20) Pick up the correct statement for the web stiffeners?

a) D is the distance between flange angles or the clear distance between flanges

b) Vertical stiffeners are spaced at a distance not greater than 1.5 d and not less than 0.33 d

c) For horizontal stiffeners, d is the clear distance between the horizontal stiffener and the tension flange

d) All of the above

21) Moist sand may contain surface water by mass upto_____?

a) 1.25%

b) 2.5%

c) 5.0%

d) 7.5%