MCQOPTIONS
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MCQOPTIONS
This section includes 157 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Engineering Questions knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following statements is/are true for a simply supported beam? |
| A. | Deflection at supports in a simply supported beam is maximum |
| B. | Deflection is maximum at a point where slope is zero |
| C. | Slope is minimum at supports in a simply supported beam |
| D. | All of the above |
| Answer» C. Slope is minimum at supports in a simply supported beam | |
| 2. |
Which of the following stresses can be determined using Mohr's circle method? |
| A. | Torsional stress |
| B. | Bending stress |
| C. | Principal stress |
| D. | All of the above |
| Answer» D. All of the above | |
| 3. |
Which stress is induced in a member, when expansion or contraction due to temperature variation is prevented? |
| A. | Compressive stress |
| B. | Tensile stress |
| C. | Thermal stress |
| D. | None of the above |
| Answer» D. None of the above | |
| 4. |
Which theory gives satisfactory results for brittle materials? |
| A. | Maximum shear stress theory |
| B. | Maximum principle stress theory |
| C. | Shear strain energy theory |
| D. | None of the above |
| Answer» C. Shear strain energy theory | |
| 5. |
While determining crippling load, the effective length of solid circular bar is 1/ √2 of actual length if, _______ |
| A. | both ends of solid circular bar are fixed |
| B. | both ends of solid circular bar are hinged |
| C. | one end is fixed and one is free |
| D. | one end is fixed and other end is hinged |
| Answer» E. | |
| 6. |
Why are shear connectors used? |
| A. | Interconnect planks |
| B. | To avoid sliding between planks |
| C. | Both a. and b. |
| D. | None of the above |
| Answer» D. None of the above | |
| 7. |
Young’s modulus is defined as the ratio of ___________________? |
| A. | volumetric stress and volumetric strain |
| B. | lateral stress and lateral strain |
| C. | longitudinal stress and longitudinal strain |
| D. | shear stress to shear strain |
| E. | longitudinal stress and lateral strain |
| Answer» D. shear stress to shear strain | |
| 8. |
Which of the following relation represents torsional flexibility? |
| A. | GJ |
| B. | GL |
| C. | GJ / L |
| D. | L / GJ |
| Answer» E. | |
| 9. |
Which of the following materials is most elastic_________________? |
| A. | rubber |
| B. | plastic |
| C. | brass |
| D. | steel |
| E. | glass |
| Answer» E. glass | |
| 10. |
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 |
| E. | none of the above |
| Answer» C. parabola | |
| 11. |
Which of the following is the example of lever of first order__________________? |
| A. | arm of man |
| B. | pair of scissors |
| C. | pair of clinical tongs |
| D. | all of the above |
| E. | none of the above |
| Answer» E. none of the above | |
| 12. |
Which of the following has no unit __________________? |
| A. | kinematic viscosity |
| B. | surface tension |
| C. | bulk modulus |
| D. | strain |
| E. | elasticity |
| Answer» E. elasticity | |
| 13. |
Which of the following assumptions are made in torsion theory? |
| A. | Shaft is perfectly straight |
| B. | Material of the shaft is heterogeneous |
| C. | Twist cannot be uniform along the length of the shaft |
| D. | All of the above |
| Answer» B. Material of the shaft is heterogeneous | |
| 14. |
Which is the false statement about true stress-strain method______________? |
| A. | It does not exist |
| B. | It is more sensitive to changes in both metallurgical and mechanical conditions |
| C. | It gives, a more accurate picture of the ductility |
| D. | It can be correlated with stress-strain values in other tests like torsion, impact, combined stress tests etc. |
| E. | It can be used for compression tests as well |
| Answer» B. It is more sensitive to changes in both metallurgical and mechanical conditions | |
| 15. |
When two plates are butt together and riveted with cover plates with two rows of rivets, the joi;it is known as ___________________? |
| A. | lap point |
| B. | butt joint |
| C. | single riveted single cover butt joint |
| D. | double riveted double cover butt joint |
| E. | single riveted double cover butt joint |
| Answer» E. single riveted double cover butt joint | |
| 16. |
When it is indicated that a member is elastic, it means that when force is applied, it will________________? |
| A. | not deform |
| B. | be safest |
| C. | stretch |
| D. | not stretch |
| E. | none of the above |
| Answer» D. not stretch | |
| 17. |
What is the value of shear stress acting on a plane of circular bar which is subjected to axial tensile load of 100 kN? (Diameter of bar = 40 mm , θ = 42.3°) |
| A. | 58.73 Mpa |
| B. | 40.23 Mpa |
| C. | 39.60 Mpa |
| D. | Insufficient data |
| Answer» D. Insufficient data | |
| 18. |
What is the value of Rankine's constant for cast iron? |
| A. | 1 / 750 |
| B. | 1 / 1600 |
| C. | 1 / 7500 |
| D. | 1 / 9000 |
| Answer» C. 1 / 7500 | |
| 19. |
What is the strain energy stored in a cube of 50 mm, when it is subjected to shear stress of 200 Mpa. (G = 100 Gpa) |
| A. | 25 Nm |
| B. | 75 Nm |
| C. | 125 Nm |
| D. | 150 Nm |
| Answer» B. 75 Nm | |
| 20. |
What is the shear stress acting along the neutral axis, over a triangular section? |
| A. | 2.66 (S/bh) |
| B. | 1.5 (S/bh) |
| C. | 0.375 (S/bh) |
| D. | None of the above |
| Answer» B. 1.5 (S/bh) | |
| 21. |
Uniformly varying load between two sections in shear force diagram is represented by ____ |
| A. | cubic curve |
| B. | inclined line |
| C. | horizontal line |
| D. | parabolic curve |
| Answer» E. | |
| 22. |
Two parallel, equal and opposite forces acting tangentially to the surface of the body is called as _____ |
| A. | Complementary stress |
| B. | Compressive stress |
| C. | Shear stress |
| D. | Tensile stress |
| Answer» D. Tensile stress | |
| 23. |
True stress-strain curve for materials is plotted between__________________? |
| A. | load/original cross-sectional area and change in length/original length |
| B. | load/instantaneous cross-sectional area original area and log |
| C. | load/instantaneous cross-sectional area and change in length/original length |
| D. | load/instantaneous area and instantaneous area/original area |
| E. | none of the above |
| Answer» C. load/instantaneous cross-sectional area and change in length/original length | |
| 24. |
Thermal stress is not a function of _____ |
| A. | change in temperature |
| B. | coefficient of linear expansion |
| C. | modulus of elasticity |
| D. | none of the above |
| Answer» E. | |
| 25. |
The Young’s modulus of a wire is defined as the stress which will increase the length of wire compared to its original length________________? |
| A. | half |
| B. | same amount |
| C. | double |
| D. | one-fourth |
| E. | four times |
| Answer» C. double | |
| 26. |
The weakest section of a diamond riveting is the section which passes through ___________________? |
| A. | the first row |
| B. | the second row |
| C. | the central row |
| D. | one rivet hole of the end row |
| E. | none of the above |
| Answer» E. none of the above | |
| 27. |
The vertical distance between the axis of the beam before and after loading at a point is called as _______ |
| A. | deformation |
| B. | deflection |
| C. | slope |
| D. | none of the above |
| Answer» C. slope | |
| 28. |
The value of shear stress which is induced in the shaft due to the applied couple varies____________________? |
| A. | from maximum at the center to zero at the circumference |
| B. | from zero at the center to maximum at the circumference |
| C. | from maximum at the center to mini-mum at the cricumference |
| D. | from minimum at the centro to maxi-mum at the circumference |
| E. | none of the above |
| Answer» C. from maximum at the center to mini-mum at the cricumference | |
| 29. |
The value of Poisson’s ratio for steel is between_________________? |
| A. | 0.01 to 0.1 |
| B. | 0.23 to 0.27 |
| C. | 0.25 to 0.33 |
| D. | 0.4 to 0.6 |
| E. | 3 to 4 |
| Answer» D. 0.4 to 0.6 | |
| 30. |
The value of Poisson’s ratio for cast iron is_________________? |
| A. | 0.1 to 0.2 |
| B. | 0.23 to 0.27 |
| C. | 0.25 to 0.33 |
| D. | 0.4 to 0.6 |
| E. | 3 to 4 |
| Answer» C. 0.25 to 0.33 | |
| 31. |
The value of modulus of elasticity for mild steel is of the order of________________? |
| A. | 2.1xl05 kg/cm2 |
| B. | 2.1 X 106 kg/cm2 |
| C. | 2.1 x 107 kg/cm2 |
| D. | 0.1 xlO6 kg/cm2 ( |
| Answer» C. 2.1 x 107 kg/cm2 | |
| 32. |
The value of elasticity increases, when temperature _____ |
| A. | increases |
| B. | decreases |
| C. | remains constant |
| D. | none of the above |
| Answer» C. remains constant | |
| 33. |
The unit of Young’s modulus is__________________? |
| A. | mm/mm |
| B. | kg/cm |
| C. | kg |
| D. | kg/cm2 |
| E. | kg cm2 |
| Answer» E. kg cm2 | |
| 34. |
The ultimate tensile stress of mild steel compared to ultimate compressive stress is__________________? |
| A. | same |
| B. | more |
| C. | less |
| D. | more or less depending on other factors |
| E. | unpredictable |
| Answer» C. less | |
| 35. |
The total strain energy stored in a body is termed as__________________? |
| A. | resilience |
| B. | proof resilience |
| C. | modulus of resilience |
| D. | toughness |
| E. | impact energy |
| Answer» B. proof resilience | |
| 36. |
The total elongation produced in a bar of uniform section hanging vertically downwards due to its own weight is equal to that produced by a weight________________? |
| A. | of same magnitude as that of bar and applied at the lower end |
| B. | half the weight of bar applied at lower end |
| C. | half of the square of weight of bar applied at lower end |
| D. | one-fourth of weight of bar applied at lower end |
| E. | none of the above |
| Answer» C. half of the square of weight of bar applied at lower end | |
| 37. |
The torsional rigidity of a shaft is expressed by the_______________? |
| A. | maximum torque it can transmit |
| B. | number of cycles it undergoes before failure |
| C. | elastic limit up to which it resists torsion, shear and bending stresses |
| D. | torque required to produce a twist of one radian per unit length of shaft |
| E. | maximum power it can transmit at highest possible-speed |
| Answer» E. maximum power it can transmit at highest possible-speed | |
| 38. |
The thermal stress induced in a steel rod is compressive, if temperature _____ |
| A. | decreases |
| B. | increases |
| C. | remains constant |
| D. | none of the above |
| Answer» C. remains constant | |
| 39. |
The stress necessary to initiate yielding is_________________? |
| A. | considerably greater than that necessary to continue it |
| B. | considerably lesser than that necessary to continue it |
| C. | greater than that necessary to stop it |
| D. | lesser than that necessary to stop it |
| E. | equal to that necessary to stop it |
| Answer» B. considerably lesser than that necessary to continue it | |
| 40. |
The stress developed in a material at breaking point in extension is called__________? |
| A. | Breaking stress |
| B. | Fracture stress |
| C. | Yield point stress |
| D. | Proof stress |
| Answer» B. Fracture stress | |
| 41. |
The stress induced in a body due to suddenly applied load compared to when it is applied gradually is________________? |
| A. | same |
| B. | half |
| C. | two times |
| D. | four times |
| E. | none of the above |
| Answer» D. four times | |
| 42. |
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 |
| E. | proof stress |
| Answer» B. fracture stress | |
| 43. |
The stress at which extension of the material takes place more quickly as compared to the increase in load is called______________? |
| A. | elastic point of the material |
| B. | plastic point of the material |
| C. | breaking point of the material |
| D. | yielding point of the material |
| E. | ultimate point of the material |
| Answer» E. ultimate point of the material | |
| 44. |
The strain energy stored in a body due to suddenly applied load compared to when it is applied gradually is____________________? |
| A. | same |
| B. | twice |
| C. | four times |
| D. | eight times |
| E. | half |
| Answer» D. eight times | |
| 45. |
The shear stress acting on the neutral axis of a beam is _____ |
| A. | maximum |
| B. | minimum |
| C. | zero |
| D. | none of the above |
| Answer» B. minimum | |
| 46. |
The safe twisting moment for a compound shaft is equal to the _________________? |
| A. | maximum calculated value |
| B. | minimum calculated value |
| C. | mean value |
| D. | extreme value |
| E. | none of the above |
| Answer» C. mean value | |
| 47. |
The relation between modulus of elasticity (E), modulus of rigidity (G) and bulk modulus (K) is given as ________ |
| A. | K+G / (3K+ G) |
| B. | 3 KG / (3K+ G) |
| C. | 3 KG / (9K+ G) |
| D. | 9 KG / (3K+ G) |
| Answer» E. | |
| 48. |
The ratio of stress and strain is known as _____ |
| A. | Modulus of elasticity |
| B. | Young's modulus |
| C. | Both a. and b. |
| D. | None of the above |
| Answer» D. None of the above | |
| 49. |
The ratio of maximum shear stress to average shear stress is 4/3 in _______ |
| A. | circular cross-section |
| B. | rectangular cross-section |
| C. | square cross-section |
| D. | all of the above |
| Answer» B. rectangular cross-section | |
| 50. |
The ratio of lateral strain to the linear strain within elastic limit is known as_______________? |
| A. | Young’s modulus |
| B. | bulk modulus |
| C. | modulus of rigidity |
| D. | modulus of elasticity |
| E. | Poisson’s ratio |
| Answer» F. | |