**1. Elasticity of various materials is controlled by its**

(a) Ultimate tensile stress

(b) Proof stress

(c) Stress at yield point

(d) Stress at elastic limit

**Answer. (d)**

**2. Ratio of direct stress to volumetric strain in case**

**of a body subjected to three mutually perpendicular**

**stress of equal intensity, is**

(a) Young’s modulus

(b) Bulk modulus

(c) Modulus of rigidity

(d) None of the above

**Answer. (b)**

**3. Moment diagram for a cantilever beam carrying**

**linearly varying load from zero at free end to maximum**

**at supported end will be**

(a) Rectangle

(b) Triangle

(c) Parabola

(d) Cubic parabola

**Answer. (d)**

**4. A large cylindrical vessel was sealed in summer.**

**What is likely to happen to it in winter**

(a) Nothing

(b) Explode

(c) Buckle and collapse

(d) Become lighter

**Answer. (c)**

**5. In thick cylinders, the stress can be uniformly**

**distributed over the thickness by the method of**

**pre-stressing as**

(a) Self-hooping

(b) Constructing laminated cylinders

(c) Shrinking hollow cylinder over main cylinder

(d) Any one of the above

**Answer. (d)**

**6. Ratio if lateral strain to linear strain elastic limit,**

**is known as**

(a) Young’s modulus

(b) Bulk modulus

(c) Modulus of rigidity

(d) Poisson’s ratio

**Answer. (d)**

**7. Maximum shear stress in Mohr’s circle is equal to**

(a) Radius of circle

(b) Diameter of circle

(c) Centre of circle from y-axis

(d) Chord of circle

**Answer. (a)**

**8. In cantilever, irrespective of the type of loading,**

**maximum bending moment and maximum shear**

**force occur at**

(a) Free end

(b) Under the load

(c) Fixed end

(d) Middle

**Answer. (c)**

**9. If a material expands freely due to heating it will develop**

(a) Thermal stresses

(b) Tensile stress

(c) No stress

(d) Bending

**Answer. (c)**

**10. Poisson’s ratio is defined as the ratio of**

(a) Longitudinal stress and longitudinal strain

(b) Longitudinal stress and lateral stress

(c) Lateral stress and longitudinal stress

(d) Lateral stress and lateral strain

**Answer. (c)**

**11. Change in the unit volume of a material under**

**tension with increase in its Poisson’s ratio will**

(a) Increase

(b) Decrease

(c) Remain same

(d) Unpredictable

**Answer. (b)**

**12. In the tensile test, the phenomenon of slow extension**

**of the material i.e. stress increasing with the time at a constant**

**load is called**

(a) Creeping

(b) Yielding

(c) Breaking

(d) Plasticity

**Answer. (a)**

**13. For steel, the ultimate strength in shear as**

**comapred to in tension is nearly**

(a) Same

(b) Half

(c) One-third

(d) Two-third

**Answer. (b)**

**14. Value of Poisson’s ratio for steel is between**

(a) 0.01 to 01

(b) 0.23 to 0.27

(c) 0.25 to 0.33

(d) 0.4 to 0.6

**Answer. (c)**

**15. Percentage reduction in the area of a cast iron**

**specimen during tensile test would be of the order of**

(a) More than 50%

(b) 25-50%

(c) 10-25%

(d) Negligible

**Answer. (d)**

**16. In a tensile test, near the elastic limit zone**

(a) Tensile strain increases more quickly

(b) Tensile strain decreases more quickly

(c) Tensile strain increases in proportion to the stress

(d) Tensile strain decreases in proportion to the stress

**Answer. (a)**

**17. The property of a material by virtue of which it**

**can be beaten or rolled into plates is called**

(a) Malleability

(b) Ductility

(c) Plasticity

(d) Elasticity

**Answer. (a)**

**18. In the buckling load for a given material depends on**

(a) Slenderness ratio and area of cross-section

(b) Poisson’s ratio and modulus of elasticity

(c) Slenderness ratio and modulus of elasticity

(d) Slendemess ratio, area of cross-section and

modulus of elasticity

**Answer. (d)**

**19. The stress developed in a material at breaking**

**point in extension is called**

(a) Breaking stress

(b) Fracture stress

(c) Yield point stress

(d) Ultimate tensile stress

**Answer. (a)**

**20. In a tensile test on mild steel specimen, the**

**breaking stress as compared to ultimate tensile**

**stress is**

(a) More

(b) Less

(c) Same

(d) More/less depending on composition

**Answer. (b)**

**21. Two beams have same depth but one beam has**

**double the width of the other. The elastic strength**

**of double width beam compared to other beam**

**will be**

(a) Same

(b) Half

(c) Double

(d) One-fourth

**Answer. (b)**

**22. When a rectangular beam is loaded longitudinally,**

**shear develops on**

(a) Top fibre

(b) Middle fibre

(c) Bottom fibre

(d) Every horizontal plane

**Answer. (d)**

**23. For a cantilever beam of uniform width in plan**

**and loaded by a concentrated load at the end,**

**profile of the shape of the beam in elevation, in**

**order that beam is of uniform strength, should**

**be**

(a) Uniform depth

(b) Triangular

(c) Parabola

(d) Cubic parabola

**Answer. (c)**

**24. Poisson ’s ratio determined by taking reading**

**when load is applied gradually compared to that**

**taken with load applied at a faster rate would**

**be**

(a) Same

(b) Different

(c) More or less same

(d) Depends on other factors

**Answer. (b)**

**25. Stresses at any point in the thick cylinder are**

(a) Tensile

(b) Compressive

(c) Shear

(d) Principal

**Answer. (d)**