MCQOPTIONS
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MCQOPTIONS
This section includes 398 Mcqs, each offering curated multiple-choice questions to sharpen your Strength of Materials knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A cantilever beam rectangular in cross-section is subbjected to a load W at its free end. If the depth of the beam is doubled and the load is halved, the deflection of the free end as compared to original deflection will be |
| A. | Double |
| B. | One-sixteenth |
| C. | Eight times |
| D. | One eight |
| E. | Half |
| Answer» C. Eight times | |
| 2. |
A short, hollow cast iron cylinder with a wall thickness of 1 cm is to carry a compressive load of 10 tonnes. If the working stress in compression is 800 kg/cm2, the outside diameter of the cylinder should not be less than |
| A. | 0.5 cm |
| B. | 1.0 cm |
| C. | 4.5 cm |
| D. | 2.5 cm |
| E. | 5 cm |
| Answer» F. | |
| 3. |
A beam fixed at both ends with a central load W in the middle will have zero bending moment as |
| A. | One place |
| B. | No where |
| C. | Three places |
| D. | Four places |
| E. | Two places |
| Answer» F. | |
| 4. |
In case of thin cylindrical shell with hemispherical ends |
| A. | The thickness of cylindrical is more than that of spherical ends |
| B. | The thickness of cylinderical shell is less than that of spherical ends |
| C. | The thickness of cylindrical is same as that of spherical ends |
| D. | The thickness of cylindrical shell is double of the thickness of spherical shell |
| E. | None of the above |
| Answer» B. The thickness of cylinderical shell is less than that of spherical ends | |
| 5. |
A thin cylinder contains fluid at a pressure of 30 kg/cm2, the inside diameter of the shell is 60 cm and the tensile stress in the material is to be limited to 900 kg/cm2. The shell must have minimum wall thickness of |
| A. | 1000 mm |
| B. | 1 mm |
| C. | 2.7 mm |
| D. | 10 mm |
| E. | 9 mm |
| Answer» E. 9 mm | |
| 6. |
Web crippling occurs due to |
| A. | column action of the web |
| B. | failure of web under concentrated load |
| C. | excessive bending moment |
| D. | secondary stresses |
| E. | None of the above |
| Answer» C. excessive bending moment | |
| 7. |
A pressure vessel is said to be thin walled when the ratio of internal diameter of the vessel and wall thickness is |
| A. | More than 20 |
| B. | 5 |
| C. | There is no such relationship |
| D. | 15 |
| E. | 10 |
| Answer» B. 5 | |
| 8. |
Static loading of a specimen |
| A. | Is done in steps |
| B. | Is done by continuously increasing the work load |
| C. | Is done by applying load in a short period during specified intervals |
| D. | Is done by applying the load slowly enough so that all parts of the specimen are in equilibrium at any instant |
| E. | None of the above |
| Answer» E. None of the above | |
| 9. |
Force required to punch a 15 mm hole in a mild steel pipe 5 mm thick, when ultimate shear stress of the plate is 500 N/mm2, will be nearly |
| A. | 78 kN |
| B. | 98 kN |
| C. | 118 kN |
| D. | 158 kN |
| E. | None of the above |
| Answer» D. 158 kN | |
| 10. |
For a beam of uniform strength if its depth is maintained constant, then its width will vary in proportion to |
| A. | Bending Moment, BM |
| B. | (BM)2 |
| C. | (BM) |
| D. | (BM)3 |
| E. | None of the above |
| Answer» B. (BM)2 | |
| 11. |
Two beams carrying identical loads simply supported are having same width but beam A has double the depth as compared to that of beam B. The ratio of elastic strength of neam A compared to that of B will be |
| A. | 2 |
| B. | ? |
| C. | 4 |
| D. | 8 |
| Answer» E. | |
| 12. |
A bronze specimen has modulus of elasticity 1.2 x 105 N/mm2 and modulus of rigidity 4.7 x 104 N/mm2. The Poisson's ratio of the material will be |
| A. | 0.196 |
| B. | 0.276 |
| C. | 0.45 |
| D. | 0.471 |
| E. | None of the above |
| Answer» C. 0.45 | |
| 13. |
The intensity of wind pressure is taken as |
| A. | directly proportinal to wind velocity |
| B. | universely proportional to wind velocity |
| C. | directly proportional to square of wind velocity |
| D. | inversely proportional to square of wind velocity |
| E. | None of the above |
| Answer» D. inversely proportional to square of wind velocity | |
| 14. |
The theory of failure considered appropriate for ductile materials is |
| A. | Rankines theory |
| B. | Beltrami's theory |
| C. | St. Venant theory |
| D. | Von Mises theory. |
| E. | None of the above |
| Answer» E. None of the above | |
| 15. |
The amount of resilience is equal to |
| A. | The work required to deform the body zero stress to stress within elastic limit |
| B. | Elastic energy stored in unit area of material |
| C. | Equal to the area of the stress deformation diagram |
| D. | None of the above |
| E. | None of the above |
| Answer» B. Elastic energy stored in unit area of material | |
| 16. |
The neutral axis of a simply supported beam is |
| A. | Where fibres are subjected to maximum compression |
| B. | Where fibres do not undergo strain |
| C. | Where fibres are subjected to maximum bending stress |
| D. | When fibres are subjected to minimum bending stress |
| E. | Where fibres undergo maximum strain |
| Answer» C. Where fibres are subjected to maximum bending stress | |
| 17. |
A strip of steel 75 mm wide 40 mm thick is bent round a circular drum of 4.96 m outside diameter. If E = 2 x 105 N/mm2, the maximum stress due to bending will be |
| A. | 1600 N/mm2 |
| B. | 1200 N/mm2 |
| C. | 800 N/mm2 |
| D. | 400 N/mm2 |
| E. | None of the above |
| Answer» B. 1200 N/mm2 | |
| 18. |
The light gauge steel structural members are usually |
| A. | hot rolled |
| B. | cold rolled |
| C. | casted |
| D. | riveted |
| E. | None of the above |
| Answer» C. casted | |
| 19. |
A cantilever beam of length 5 m carries a uniformly distributed load of 100 Newtons/m throughout its length. The maximum shearing force in the beam will be |
| A. | 100 N |
| B. | 250 N |
| C. | 500 N |
| D. | 1250 N |
| E. | None of the above |
| Answer» D. 1250 N | |
| 20. |
A load of 10,000 kg is applied to copper cylinder 20 cm long and 5 cm in diameter causes the length to increase by 4 mm and diameter to decrease by 0.4 mm. The Poisson's ratio for copper would be |
| A. | 0.33 |
| B. | 0.4 |
| C. | 0.25 |
| D. | 0.23 |
| E. | 0.6 |
| Answer» C. 0.25 | |
| 21. |
A beam supported at more than two places is known as |
| A. | Flitched beam |
| B. | Uniform beam |
| C. | Continuous beam |
| D. | Economical beam |
| E. | None of the above |
| Answer» D. Economical beam | |
| 22. |
The Erichsen cupping number of a sheet metal indicates its |
| A. | Surface roughness |
| B. | Drawing quality |
| C. | Hardness |
| D. | Ductility |
| E. | Toughness |
| Answer» C. Hardness | |
| 23. |
A bolt of nominal diameter 33 mm having a safe tensile stress of 100 N/mm2 can safely carry a load of |
| A. | 260 kN |
| B. | 100 kN |
| C. | 150 kN |
| D. | 160 kN |
| E. | 60 kN |
| Answer» F. | |
| 24. |
The effect of arching a beam is to |
| A. | increase the shear force |
| B. | reduce the shear force |
| C. | reduce the bending moment throughout |
| D. | increase the bending moment throughout |
| E. | None of the above |
| Answer» D. increase the bending moment throughout | |
| 25. |
The limiting values of Poisson's ratio are |
| A. | 0 and 1 |
| B. | ?1 and +1 |
| C. | ?0.5 and +0.5 |
| D. | ?1 and +0.5 |
| E. | None of the above |
| Answer» E. None of the above | |
| 26. |
It is desired to punch a hole of 20 mm diameter in a plate 20 mm think. If the shear stress of mild steel is 30 kg/mm2, the force necessary for punching would be approximately in the range |
| A. | 20 - 25 tonnes |
| B. | 15 - 20 tonnes |
| C. | 10 - 15 tonnes |
| D. | 35 - 40 tonnes |
| E. | 25 - 35 tonnes |
| Answer» E. 25 - 35 tonnes | |
| 27. |
The phenomenon under which the strain of a material varies under constant stress is known as |
| A. | Buchinger's effect |
| B. | Hysteresis |
| C. | Visco-elasticity |
| D. | Creep |
| E. | Strain hardening |
| Answer» E. Strain hardening | |
| 28. |
A solid circular shaft and a thin walled circular tube made of the same material and having the same weight are stressed in torsion to the same maximum shear stress. The ratio of the amounts of strain energy stored in the two shafts would be |
| A. | 1?4 |
| B. | 1 |
| C. | 2 |
| D. | ? |
| E. | 1?2 |
| Answer» E. 1?2 | |
| 29. |
The shape of the Kem area for a rectangular section is |
| A. | Rhombus |
| B. | Rectangle |
| C. | Square |
| D. | Parallelogram |
| E. | Circle |
| Answer» E. Circle | |
| 30. |
A masonry dam is liable to fail |
| A. | By sliding on the soil on which it rests |
| B. | Over overturning |
| C. | Due to tensile stress developed |
| D. | Due to excessive compressive stresses |
| E. | Any of the above |
| Answer» F. | |
| 31. |
The allowable stresses for the design of steel chimney depend upon the ratio of |
| A. | area of cylindrical portion of the area flared portion |
| B. | volume of cylindrical portion to the volume of flared portion |
| C. | weight of cylindrical portion to the weight of the flared portion |
| D. | effective height to the radius of gyration |
| E. | None of the above |
| Answer» E. None of the above | |
| 32. |
For any shaft the number of critical speed is |
| A. | infinite |
| B. | depends on size and load |
| C. | 2 |
| D. | 1 |
| E. | depends on external load and moment of inertia |
| Answer» B. depends on size and load | |
| 33. |
A body is subjected to two normal stresses of 200 kN/m2 (tensile) and 100 kN/m2 (compressive) acting mutually perpendicular to each other. The maximum sher stress is equal to |
| A. | 50 kN/m2 |
| B. | 100 kN/m2 |
| C. | 150 kN/m2 |
| D. | 300 kN/m2 |
| E. | None of the above |
| Answer» D. 300 kN/m2 | |
| 34. |
In case of a hinged support, the reaction |
| A. | Acts perpendicular to the beam |
| B. | In a direction which depends on the loads |
| C. | Acts in a direction opposite to the resultant shear force at the support |
| D. | Acts perpendicular to the surface of hinge |
| E. | Acts along the axis of beam |
| Answer» D. Acts perpendicular to the surface of hinge | |
| 35. |
In a universal testing machine during the testing of a specimen of original cross-sectional area 1 cm2 the maximum load appliied was 7.5 tonnes and neck area 0.6 sq. cm. The ultimate tensile strength of the specimen is |
| A. | 12.5 tonnes/cm2 |
| B. | 10.0 tonnes/cm2 |
| C. | 7.5 tonnes/cm2 |
| D. | 4.5 tonnes/cm2 |
| E. | None of the above |
| Answer» D. 4.5 tonnes/cm2 | |
| 36. |
The limiting value of span to depth ratio will be least in case of |
| A. | simply supported slabs spanning in one direction |
| B. | simply supported slabs spanning in two directions |
| C. | continuous salb spanning in one direction |
| D. | cantilever slabs |
| E. | None of the above |
| Answer» E. None of the above | |
| 37. |
A spring steel ribbon 3.2 mm wide, 0.5 mm thick is wound on a 500 mm diameter cylinder. If E = 2 x 105 N/mm2, the maximum stress in the steel will be |
| A. | 100 N/mm2 |
| B. | 200 N/mm2 |
| C. | 400 N/mm2 |
| D. | 800 N/mm2 |
| E. | None of the above |
| Answer» C. 400 N/mm2 | |
| 38. |
The torsional resisting moment of the following section is being considered with identical characteristic parameter. Which section will have maximum torsional resisting moment |
| A. | Hollow circular |
| B. | Circular |
| C. | Triangular |
| D. | Square |
| E. | Hexagonal |
| Answer» F. | |
| 39. |
When a beam having square cross-section is loaded longitudinally, the shear stress develops |
| A. | On middle fibre in vertical plane |
| B. | On top fibre in horizontal plane |
| C. | Equally on each fibre along horizontal plane |
| D. | Along the diagonal |
| E. | One middle fibres in horizontal plane |
| Answer» D. Along the diagonal | |
| 40. |
In case of non-dilatent materials, the maximum value of Poisson's ratio is |
| A. | 0.5 |
| B. | 0.25 |
| C. | 0.33 |
| D. | 0.47 |
| E. | 0.6 |
| Answer» B. 0.25 | |
| 41. |
The strength of a riveted plate in tearing should be based on |
| A. | the rivet diameter |
| B. | the rivet hole diameter |
| C. | the average of (A) and (B) above |
| D. | the average of (A) and (B) above plus 2 mm. |
| E. | None of the above |
| Answer» C. the average of (A) and (B) above | |
| 42. |
The plastic moment of a beam can be 50 percent more than the maximum elastic moment in case the cross-section of the beam is |
| A. | Circular |
| B. | Rectangular |
| C. | Elliptical |
| D. | I-section |
| E. | Semi-circular |
| Answer» C. Elliptical | |
| 43. |
The modulus of resilience in tension is nearly |
| A. | 65 kJ/m3 |
| B. | 130 kJ/m3 |
| C. | 210 kJ/m3 |
| D. | 260 kJ/m3 |
| E. | None of the above |
| Answer» E. None of the above | |
| 44. |
The materials which exhibit the same elastic properties in all directions are called |
| A. | Visco-elastic |
| B. | Isentropic |
| C. | Isotropic |
| D. | Inelastic |
| E. | Homogeneous |
| Answer» D. Inelastic | |
| 45. |
Laminated springs are generally |
| A. | loaded at ends and supported at centre |
| B. | loaded at centre and supported at ends |
| C. | loaded as well as supported at centre |
| D. | loaded as well as supported at ends |
| E. | None of the above |
| Answer» C. loaded as well as supported at centre | |
| 46. |
The size of hole drilled in plates for rivetting is |
| A. | Equal to the diameter of rivet shank |
| B. | Slightly smaller than the diameter of river shank |
| C. | 1.5 to 2 mm smaller than the diameter of rivet for revets of 25 mm and above size |
| D. | 1.5 to 2 mm large than the diameter of the rivet for rivets of 25 mm and above size |
| E. | None of the above |
| Answer» E. None of the above | |
| 47. |
In M.L.T. system the dimensions of Young's modulus of elasticity are |
| A. | MLT |
| B. | ML-1 T-2 |
| C. | MLT-2 |
| D. | ML-2 T-2 |
| E. | MLT-1 |
| Answer» C. MLT-2 | |
| 48. |
A column is known as short column if |
| A. | The length is more than 30 times the diameter |
| B. | The slenderness ratio is more than 32 |
| C. | Slenderness ratio is more than 120 |
| D. | The length is less than 8 times the diameter |
| E. | The length is 15 times the diameter |
| Answer» E. The length is 15 times the diameter | |
| 49. |
During the tensile test on a glass rod, the nature of stress section curve is |
| A. | Vertical line |
| B. | Sudden break |
| C. | Same as that for mild steel |
| D. | Horizontal line |
| E. | Straight line |
| Answer» C. Same as that for mild steel | |
| 50. |
The modulus of resilience is |
| A. | The energy stored in a body |
| B. | Strain energy stored in a specimen when strained within elastic limit |
| C. | The maximum energy stored at elastic limit per unit volume. |
| D. | Strain energy stored in a specimen when strained beyond elastic limit |
| E. | The maximum energy stored at elastic limit |
| Answer» D. Strain energy stored in a specimen when strained beyond elastic limit | |