# Practice Test: Question Set - 04

**1. Pick up the incorrect statement**

- (A) The
cross-sectional area of the welded member is effective

- (B) A
welded joint develops strength of its parent metal

- (C) Welded
joints provide rigidity

- (D) Welding
takes more time than riveting

**2. A 8 metre long simply supported rectangular beam which carries a distributed load 45 kg/m. experiences a maximum fibre stress 160 kg/cm**

^{2}. If the moment of inertia of the beam is 640 cm^{4}, the overall depth of the beam is- (A) 10 cm

- (B) 12 cm

- (C) 15 cm

- (D) 18 cm

**3. A heavy ladder resting on floor and against a vertical wall may not be in equilibrium, if**

- (A) The floor is smooth, the wall is rough

- (B) The floor is rough, the wall is smooth

- (C) The floor and wall both are smooth surfaces

- (D) The floor and wall both are rough surfaces

**4. A triangular section having base**

*b*, height*h*, is placed with its base horizontal. If the shear stress at a depth*y*from top is*q*, the maximum shear stress is- (A) 3

*S*/

*bh*

- (B) 4

*S*/

*bh*

- (C) 4

*b*/

*Sh*

- (D) 3

*b*/

*bS*

**5. Maximum deflection of a**

- (A) Cantilever
beam carrying a concentrated load

*W*at its free end is

*WL*

^{3}/3

*EI*

- (B) Simply
supported beam carrying a concentrated load

*W*at mid-span is

*WL*

^{3}/48

*EI*

- (C) Cantilever
beam, carrying a uniformly distributed load over span is

*WL*

^{3}/8

*EI*

- (D) All the
above

**6. From a circular plate of diameter 6 cm is cut out a circle whose diameter is a radius of the plate. Find the e.g. of the remainder from the center of circular plate**

- (A) 0.5 cm

- (B) 1.0 cm

- (C) 1.5 cm

- (D) 2.5 cm

**7. If a rectangular beam measuring 10 × 18 × 400 cm carries a uniformly distributed load such that the bending stress developed is 100 kg/cm**

^{2}. The intensity of the load per metre length, is- (A) 240 kg

- (B) 250 kg

- (C) 260 kg

- (D) 270 kg

**8. If two tensile forces mutually perpendicular act on a rectangular parallelepiped bar are equal, the resulting elongation of the pipe, is**

- (A) (

*P*/

*E*) (1 -

*m*)

- (B) (

*E*/

*P*) (

*m*-1)

- (C) (

*E*/

*P*) (1 -

*m*)

- (D) (

*P*/

*E*) (1 +

*m*)

**9. On a ladder resting on smooth ground and leaning against vertical wall, the force of friction will be**

- (A) Towards the wall at its upper end

- (B) Away from the wall at its upper end

- (C) Upwards at its upper end

- (D) Downwards at its upper end

**10. If the rivets in adjacent rows are staggered and outermost row has only one rivet, the arrangement of the rivets, is called**

- (A) Chain
riveting

- (B) Zig-zag
riveting

- (C) Diamond
riveting

- (D) None of
these

**11. The bending moment at**

*C*of a portal frame shown in below figure is- (A) 8

*t*-m

- (B) 4

*t*-m

- (C) 28

*t*-m

- (D) Zero

**12. If three forces acting in one plane upon a rigid body, keep it in equilibrium, then they must either**

- (A) Meet in a point

- (B) Be all parallel

- (C) At least two of them must meet

- (D) All the above are correct

**13. In a three hinged arch, the shear force is usually**

- (A) Maximum at
crown

- (B) Maximum at
springing

- (C) Maximum at
quarter points

- (D) Varies with
slope

**14. If**

*Z*and*I*are the section modulus and moment of inertia of the section, the shear force*F*and bending moment*M*at a section are related by- (A)

*F*=

*My*/

*I*

- (B)

*F*=

*M*/

*Z*

- (C)

*F*=

*dM*/

*dx*

- (D)

*F*= ∫

*Mdx*

**15. A pair of smith's tongs is an example of the lever of**

- (A) Zeroth order

- (B) First order

- (C) Second order

- (D) Third order

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