7. Incase of principal axes of a section :
(A) sum of moment of inertia is zero
(B) difference of moment inertia is zero
(C) product of moment of inertia is zero
(D) _ none of these
8. [7 case of a beam of rectangular cross section simply supported over a span L and loaded
with a central load W, length of elasto-plastic zone of the plastic hinge is :
(A) 1/2 ⊳ (8) 1/3
(0 144 ` @ 18
9. The degree of static indeterminacy of a rigid-jointed space frame is :
(4) m+r-2j ൯) 7೩-7-3)
(0) 38m+r-3j (0) 6m+r-6j
10. For stable structures, one of the important properties of flexibility and stiffness matrices is
that the elements on the main diagonal
Gi) of a stiffness matrix must be positive
(i) ofa stiffness matrix must be negative
(11) of a flexibility matrix must be positive
Gv) ofa flexibility matrix must be negative
The correct answer is :
(ಸ) @) and Gii) (B) (0 ೩೩4 (1)
(0) 0) 2०१ (6९) (D) (i) and (iv)
11. In SPT, the test uses a thick-walled sample tube, with an outside diameter :
(A) 45mm (B) 53mm
(C) 55mm (2) 50mm
12. Unconfined compressive strength is given by 120 kN/m?, what will be the unconfined shear
strength or cohesion?
(ಹ) 60 kN/m? (B) 80 kN/m?
(C) 90 kN/m? (D) 120 kN/m?
13. Ifa soil is fully saturated having void ratio 0.67 what will be the porosity?
(A) 40% (B) 42%
(C) 44% (D) 46%
155/2015 4 A