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 P, Q 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)