Civil Engineering Jobs Strength of Materials Questions - Set 03 - ObjectiveBooks

# Practice Test: Question Set - 03

1. An arch with three hinges, is a structure
(A) Statically determinate
(B) Statically indeterminate
(C) Geometrically unstable
(D) Structurally sound but indeterminate

2. Beams of uniform strength are preferred to those of uniform section because these are economical for
(A) Large spans
(B) Heavy weights
(C) Light weights
(D) Short spans

3. The M.I. of hollow circular section about a central axis perpendicular to section as compared to its M.I. about horizontal axis is
(A) Same
(B) Double
(C) Half
(D) Four times

4. The tensile force required to cause an elongation of 0.045 mm in a steel rod of 1000 mm length and 12 mm diameter, is (where E = 2 × 106 kg/cm2)
(A) 166 kg
(B) 102 kg
(C) 204 kg
(D) 74 kg

5. A long vertical member, subjected to an axial compressive load, is called
(A) A column
(B) A strut
(C) A tie
(D) A stanchion

6. In ideal 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

7. The nature of the stress in horizontal members of the truss shown in below figure may be
(A) Compressive
(B) Tensile
(C) Shear
(D) Zero

8. The property of a material by which it can be drawn to a smaller section, due to tension, is called
(A) Plasticity
(B) Ductility
(C) Elasticity
(D) Malleability

9. The unit of force in S.I. units is
(A) Kilogram
(B) Newton
(C) Watt
(D) Dyne

10. A bending moment may be defined as:
(A) Arithmetic sum of the moments of all the forces on either side of the section
(B) Arithmetic sum of the forces on either side of the section
(C) Algebraic sum of the moments of all the forces on either side of the section
(D) None of these

11. If a circular beam of diameter d experiences a longitudinal strain P/E and a lateral strain 2P/mE, the volumetric strain is
(A) (P/E) + (2P/mE)
(B) (P/E) - (2P/mE)
(C) (P/E) + (mE/2P)
(D) (P/E) - (mE/2P)

12. The resolved part of the resultant of two forces inclined at an angle Ï• in a given direction is equal to
(A) The algebraic sum of the resolved parts of the forces in the given direction
(B) The sum of the resolved parts of the forces in the given direction
(C) The difference of the forces multiplied by the cosine of Ï•
(D) The sum of the forces multiplied by the sine of Ï•

13. For structural analysis, Maxwell's reciprocal theorem can be applied to:
(A) Plastic structures
(B) Elastic structures
(C) Symmetrical structures
(D) All the above

14. If all the dimensions of a bar are increased in the proportion n : 1, the proportion with which the maximum stress produced in the prismatic bar by its own weight, will increase in the ratio
(A) 1 : n
(B) n : 1
(C) 1 : (1/n)
(D) 1 : √n

15. Which of the following is a vector quantity?
(A) Energy
(B) Mass
(C) Momentum
(D) Angle

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