# Practice Test: Question Set - 05

**1. The direction of the reaction at support**

*B*of a truss shown in below figure will be- (A) East of
North

- (B) West of
North

- (C) East of
South

- (D) West of
South

**2. A beam of length**

*L*supported on two intermediate rollers carries a uniformly distributed load on its entire length. If sagging B.M. and hogging B.M. of the beam are equal, the length of each overhang, is- (A) 0.107

*L*

- (B) 0.207

*L*

- (C) 0.307

*L*

- (D) 0.407

*L*

**3. The unit of work or energy in S.I. units is**

- (A) Newton

- (B) Pascal

- (C) Kilogram meter

- (D) Joule

**4. The shear force on a simply supported beam is proportional to**

- (A) Displacement
of the neutral axis

- (B) Sum of the
forces

- (C) Sum of the
transverse forces

- (D) Algebraic
sum of the transverse forces of the section

**5. Shear deflection of a cantilever of length**

*L*, cross sectional area*A*and shear modulus*G*, subjected to w/m u.d.l., is- (A) (3/4) (

*L*

^{2}

*w*/

*GA*)

- (B) (3/2) (

*L*

^{2}

*w*/

*GA*)

- (C) (2/3) (

*L*

^{3}

*w*/

*GA*)

- (D) (3/2) (

*Lw*/

*GA*

^{2})

**6. Which of the following is not the unit of distance?**

- (A) Angstrom

- (B) Light year

- (C) Micron

- (D) Milestone

**7. In a bar of large length when held vertically and subjected to a load at its lower end, its own-weight produces additional stress. The maximum stress will be**

- (A) At the lower
cross-section

- (B) At
the built-in upper cross-section

- (C) At the
central cross-section

- (D) At every
point of the bar

**8. The value of Poisson's ratio always remains**

- (A) Greater than
one

- (B) Less than
one

- (C) Equal to one

- (D) None of
these

**9. The B.M. diagram of the beam shown in below figure, is**

- (A) A rectangle

- (B) A triangle

- (C) A
trapezium

- (D) A parabola

**10. Which of the following is not a vector quantity?**

- (A) Weight

- (B) Velocity

- (C) Acceleration

- (D) Force

**11. The greatest eccentricity which a load**

*W*can have without producing tension on the cross-section of a short column of external diameter*D*and internal diameter*d*, is- (A) 4

*W*/

*Ï€*(

*D*

^{2}-

*d*

^{2})

- (B)

*Ï€*(

*D*

^{2}-

*d*

^{2})/32

*D*

- (C) (

*D*

^{2}+

*d*

^{2})/8

*D*

- (D) (

*D*

^{2}-

*d*

^{2})/8

*D*

**12. If**

*‘S’*is the shear force at a section of an*I*-joist, having web depth*‘d’*and moment of inertia*‘I’*about its neutral axis, the difference between the maximum and mean shear stresses in the web is,- (A)

*Sd*

^{2}/8

*I*

- (B)

*Sd*

^{2}/12

*I*

- (C)

*Sd*

^{2}/16

*I*

- (D)

*Sd*

^{2}/24

*I*

**13. Center of gravity of a thin hollow cone lies on the axis at a height of**

- (A) One-fourth of the total height above base

- (B) One-third of the total height above base

- (C) One-half of the total height above base

- (D) Three-eighth of the total height above the
base

**14. A rectangular bar of width**

*b*and height*h*is being used as a cantilever. The loading is in a plane parallel to the side*b*. The section modulus is- (A)

*bh*

^{3}/12

- (B)

*bh*

^{2}/6

- (C)

*b*

^{2}

*h*/6

- (D) None of
these

**15. A beam is said to be of uniform strength, if**

- (A) B.M. is same
throughout the beam

- (B) Shear stress
is same throughout the beam

- (C) Deflection
is same throughout the beam

- (D) Bending
stress is same at every section along its longitudinal axis

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