# Practice Test: Question Set - 12

**1. The width**

*b*and depth*d*of a beam cut from a wooden cylindrical log of 100 cm diameter for maximum strength are:- (A)

*b*= 57.73 cm

*d*= 81.65 cm

- (B)

*b*= 81.65 cm

*d*= 57.73 cm

- (C)

*b*= 50.00 cm

*d*= 50.00 cm

- (D)

*b*= 40.00 cm

*d*= 80.00 cm

**2. Which of the following is the locus of a point that moves in such a manner that its distance from a fixed point is equal to its distance from a fixed line multiplied by a constant greater than one**

- (A) Ellipse

- (B) Hyperbola

- (C) Parabola

- (D) Circle

**3. As compared to uniaxial tension or compression, the strain energy stored in bending is only**

- (A) 1/8

- (B) 1/4

- (C) 1/3

- (D) 1/2

**4. Strain energy of any member may be defined as work done on it**

- (A) To deform it

- (B) To
resist elongation

- (C) To
resist shortening

- (D) All the
above

**5. Effect of a force on a body depends upon**

- (A) Magnitude

- (B) Direction

- (C) Position or line of action

- (D) All of the above

**6. If**

*n*is the ratio of internal and external diameters of a hollow shaft, the ratio of the weight of the hollow shaft and that of solid shaft of same strength, will be- (A) (1 -

*n*

^{2})/(1 -

*n*

^{2})

^{1/2}

- (B) (1 -

*n*

^{2})/(1 -

*n*

^{4})

^{2/3}

- (C) (1 +

*n*

^{3})/(1 +

*n*

^{4})

^{1/2}

- (D) (1 +

*n*

^{1})/(1 +

*n*

^{4})

^{2/3}

**7. The effect of arching a beam, is**

- (A) To reduce
the bending moment throughout

- (B) To increase the bending moment throughout

- (C) Nothing on
the bending throughout

- (D) All the
above

**8. D' Alembert's principle is used for**

- (A) Reducing the problem of kinetics to
equivalent statics problem

- (B) Determining stresses in the truss

- (C) Stability of floating bodies

- (D) Designing safe structures

**9. The range within which a load can be applied on a rectangular column, to avoid any tensile stress, is**

- (A) One-half
of the base

- (B) One-fifth of
the base

- (C) One-fourth
of the base

- (D) One-sixth of
the base

**10. For the same height, the bottom width for no tension,**

- (A) For
triangular section is more than rectangular section

- (B) For
rectangular section is more than triangular section

- (C) For
triangular section is same as that of a rectangular section

- (D) None of
these

**11. Coefficient of friction is the**

- (A) Angle between normal reaction and the resultant of
normal reaction and the limiting friction

- (B) Ratio of limiting friction and normal
reaction

- (C) The friction force acting when the body is just
about to move

- (D) The friction force acting when the body is
in motion

**12. An arch may be subjected to**

- (A) Shear and
axial force

- (B) Bending
moment and shear force

- (C) Bending
moment and axial force

- (D) Thrust,
shear force and bending moment

**13. The shape of the bending moment diagram over the length of a beam, carrying a uniformly increasing load, is always**

- (A) Linear

- (B) Parabolic

- (C) Cubical

- (D) Circular

**14. The C.G. of a right circular solid cone of height h lies at the following distance from the base**

- (A)

*h*/2

- (B)

*h*/3

- (C)

*h*/6

- (D)

*h*/4

**15. For a channel section, the shear centre lies at a distance of**

- (A)

*dbt*/2

*I*

- (B)

*d*

^{2}

*bt*/3

*I*

- (C)

*d*

^{2}

*b*

^{2}

*t*/4

*I*

- (D)

*db*

^{2}

*t*/5

*I*

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