Multiple Choice Questions Applied Statics and Strength of Materials - Set 07 - ObjectiveBooks

# Practice Test: Question Set - 07

1. A framed structure is perfect if it contains members equal to
(A) 2n3
(B) nl
(C) 2nl
(D) 3n2
Where n = number of joints in a frame

2. When equal and opposite forces applied to a body, tend to elongate it, the stress so produced, is called
(A) Shear stress
(B) Compressive stress
(C) Tensile stress
(D) Transverse stress

3. A joint of a frame is subjected to three tensile forces PQ and R equally inclined to each other. If P is 10 tonnes, the other forces will be
(A) Q = 10 tonnes and R = zero
(B) R + 10 tonnes and Q = zero
(C) Q + R = 10 tonnes
(D) Q and R each is equal to 10 tonnes

4. In the equation of virtual work, following force is neglected
(A) Reaction of any smooth surface with which the body is in contact
(B) Reaction of a rough surface of a body which rolls on it without slipping
(C) Reaction at a point or an axis, fixed in space, around which a body is constrained to turn
(D) All of the above

5. The structure shown in below figure is stable, if
(A) x = √3y/2
(B) x = 2y
(C) √x = y
(D) √(2x) = y

6. Pick up the correct statement from the following:
(A) The rate of change of bending moment is equal to rate of shear force
(B) The rate of change of shear force is equal to rate of loading
(C) Neither (a) nor (b)
(D) Both (a) and (b)

7. Tangent of angle of friction is equal to
(A) Kinetic friction
(B) Limiting friction
(C) Angle of repose
(D) Coefficient of friction

8. The type of butt joints in common use, is:
(A) Single inverted V-butt joint
(B) Double V-butt joint
(C) Double U-butt joint
(D) Single V-butt joint

9. For keeping the stress wholly compressive the load may be applied on a circular column anywhere within a concentric circle of diameter
(A) d/2
(B) d/3
(C) d/4
(D) d/8

10. The C.G. of a solid hemisphere lies on the central radius 3r
(A) At distance — y from the plane base
(B) At distance — 3r/4 from the plane base
(C) At distance — 3r/5 from the plane base
(D) At distance — 3r/8 from the plane base

11. In a loaded beam, the point of contraflexure occurs at a section where
(A) Bending moment is minimum
(B) Bending moment is zero or changes sign
(C) Bending moment is maximum
(D) Shearing force is maximum

12. In the given below figure, the rivets with maximum stress, are:
(A) 1 and 2
(B) 1 and 3
(C) 3 and 4
(D) 2 and 4

13. In actual machines
(A) Mechanical advantage is greater than velocity ratio
(B) Mechanical advantage is equal to velocity ratio
(C) Mechanical advantage is less than velocity ratio
(D) Mechanical advantage is unity

14. If two forces acting at a joint are not along the straight line, then for the equilibrium of the joint
(A) One of the forces must be zero
(B) Each force must be zero
(C) Forces must be equal and of the same sign
(D) Forces must be equal in magnitude but opposite in sign

15. Shear deflection of a cantilever of length L, cross sectional area A and shear modulus G, under a concentrated load W at its free end, is
(A) (2/3) (WL/AG)
(B) (1/3) (WL2/EIA)
(C) (3/2) (WL/AG)
(D) (3/2) (WL2/AG)

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