# Practice Test: Question Set - 07

**1. A framed structure is perfect if it contains members equal to**

- (A) 2

*n*

^{3}

- (B)

*nl*

- (C) 2

*nl*

- (D) 3

*n*

^{2}

**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*= √3

*y*/2

- (B)

*x*= 2

*y*

- (C)

*√x*=

*y*

- (D) √(2

*x*) =

*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) (

*WL*

^{2}/

*EIA*)

- (C) (3/2) (

*WL*/

*AG*)

- (D) (3/2) (

*WL*

^{2}/

*AG*)

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