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.
| 351. |
If the member shown in Fig. 1.1 has a |
| A. | 0.16 |
| B. | -0.16 |
| C. | 0.24 |
| D. | -0.24 |
| Answer» C. 0.24 | |
| 352. |
The factor of safety depends on i)Magnitude of external force |
| A. | i) and ii) |
| B. | ii) and iii) |
| C. | i) , ii) and iii) |
| D. | iv |
| Answer» E. | |
| 353. |
In a tensile test conducted on a ductile material, the ratio of the true stress to the engineering stress, is approximately |
| A. | 0.2 |
| B. | 1.05 |
| C. | 0.9 |
| D. | 10 |
| E. | None of the above |
| Answer» D. 10 | |
| 354. |
In a tensile test, when the material is stressed beyond elastic limit, the tensile strain |
| A. | decreases slowly |
| B. | increases slowly |
| C. | decreases more quickly |
| D. | increases more quickly |
| Answer» E. | |
| 355. |
A lap joint is always in |
| A. | single |
| B. | double |
| Answer» B. double | |
| 356. |
According to Euler's column theory, the crippling load for a column of length (l) with one end fixed and the other end free is |
| A. | equal to |
| B. | less than |
| C. | more than |
| Answer» C. more than | |
| 357. |
The shear force and bending moment zre zero at the free end of a cantilever beam, if it carries a |
| A. | point load at the free end |
| B. | point load at the middle of its length |
| C. | uniformly distributed load over the whole length |
| D. | none of the above |
| Answer» D. none of the above | |
| 358. |
A cantilever beam of length / carries a gradually varying load from zero at free end and w per unit length at the fixed end. The maximum deflection oes at |
| A. | free end |
| B. | fixed end |
| C. | mid-span |
| Answer» B. fixed end | |
| 359. |
The maximum shear stress developed in a beam of rectangular section is |
| A. | equal to |
| B. | 4 / 3 time |
| C. | 1.5 times |
| D. | twice |
| Answer» D. twice | |
| 360. |
The maximum shear stress of a beam of triangular section occurs above the neutral axis. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 361. |
The bending stress in a beam is |
| A. | equal to |
| B. | less than |
| C. | more than |
| D. | directly proportional to |
| Answer» E. | |
| 362. |
The forsional rigidity of a shaft is given by |
| A. | T / J |
| B. | T / ? |
| C. | T / r |
| D. | T / G |
| Answer» C. T / r | |
| 363. |
Within elastic limit, shear stress is |
| A. | equal to |
| B. | less than |
| C. | directly proportional to |
| D. | inversely proportional to |
| Answer» D. inversely proportional to | |
| 364. |
Two closely coiled helical springs 'A' and 'B' are equal in all respects but the number of turns of spring 'A' is half that of spring 'B'. The ratio of deflections in spring 'A' to spring 'B' is |
| A. | 1 ? 8 |
| B. | 1 ? 4 |
| C. | 1 ? 2 |
| D. | 2 |
| Answer» D. 2 | |
| 365. |
The rivets are used for |
| A. | permanent |
| B. | temporary |
| Answer» B. temporary | |
| 366. |
The section nodulus (Z) of a beam is given by |
| A. | I / y |
| B. | I.y |
| C. | y / I |
| D. | M / I |
| Answer» B. I.y | |
| 367. |
In a thick cylindrical shell subjected to an internal pressure (p), the radial stress across the thickness of a cylinder is |
| A. | maximum at the outer surface and minimum at the inner surface |
| B. | maximum at the inner surface and minimum at the outer surface |
| C. | maximum at the outer surface and zero at the inner surface |
| D. | maximum at the inner surface and zero at the outer surface |
| Answer» E. | |
| 368. |
The thermal stress |
| A. | depends |
| B. | does not depend |
| Answer» C. | |
| 369. |
In the above question, the ratio of stiffness of spring 'B' to spring 'A' will be |
| A. | 2 |
| B. | 4 |
| C. | 6 |
| D. | 8 |
| Answer» E. | |
| 370. |
On one side of a neutral axis of a beam, there is a tensile stress and on the other side of the beam there is a compressive stress |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 371. |
A load which is spread over a beam in such a manner that it varies uniformly over the whole length of a beam is called uniformly |
| A. | distributed |
| B. | varying |
| Answer» C. | |
| 372. |
The shear stress at the outermost fibres of a circular shaft under torsion is |
| A. | zero |
| B. | minimum |
| C. | maximum |
| D. | infinity |
| Answer» D. infinity | |
| 373. |
A simply supported beam 'A' of length l, breadth b and depth d carried a central point load W. Another bream 'B' has the same length and breadth but its depth is doubled. The deflection of beam 'B' will be double as compared to beam 'A'. |
| A. | Right |
| B. | Wrong |
| Answer» C. | |
| 374. |
A simply supported beam 'A' of length l, breadth b and depth d carries a central load W. Another beam 'B' of the same dimensions carries a central load equal to 2 W. The deflection of beam 'B' will be |
| A. | one-fourth |
| B. | one-half |
| C. | double |
| D. | four times |
| Answer» D. four times | |
| 375. |
A fixed beam is one which is fixed at |
| A. | One |
| B. | both |
| Answer» C. | |
| 376. |
If, for a given material, the modulus of elasticity is equal to twice its modulus of rigidity (G), then the bulk modulus is |
| A. | 2 G |
| B. | 0.33 G |
| C. | 9 G |
| D. | 0.67 G |
| E. | None of the above |
| Answer» E. None of the above | |
| 377. |
The Young's modulus of elasticity of a material is twice its modulus of rigidity. The Poisson's ratio for the material will be |
| A. | Zero |
| B. | 0.5 |
| C. | 1 |
| D. | None of the above |
| E. | None of the above |
| Answer» B. 0.5 | |
| 378. |
For riveting, the size of hole drilled in plates is |
| A. | equal to |
| B. | less than |
| C. | greater than |
| Answer» D. | |
| 379. |
When a beam is subjected to a bending moment, the strain in a layer is |
| A. | equal to |
| B. | directly proportional to |
| C. | inversely proportional to |
| D. | independent of |
| Answer» C. inversely proportional to | |
| 380. |
Two closely-coiled helical springs 'A' and 'B' of the same material, same number of turns and made from same wire are subjected to an axial load W. The mean diameter of spring 'A' is double the mean diameter of spring 'B'. The ratio of deflections in spring 'B' to spring 'A' will be |
| A. | 1 ? 8 |
| B. | 1 ? 4 |
| C. | 2 |
| D. | 4 |
| Answer» B. 1 ? 4 | |
| 381. |
A body is subjected to a direct tensile stress (?) in one plane. The shear stress is maximum at a section inclined at |
| A. | 45? and 90? |
| B. | 45? to 135? |
| C. | 60? and 150? |
| D. | 30? and 135? |
| Answer» C. 60? and 150? | |
| 382. |
In a leaf spring the length of all the leaves are equal. |
| A. | True |
| B. | False |
| Answer» C. | |
| 383. |
The ductility of the material |
| A. | increases |
| B. | decreases |
| C. | remains same |
| Answer» C. remains same | |
| 384. |
In the above question, the normal stress on an oblique section will be maximum, when ? is equal to |
| A. | 0? |
| B. | 30? |
| C. | 45? |
| D. | 90? |
| Answer» B. 30? | |
| 385. |
A column of length (l) with both ends fixed may be considered as equivalent to a column of length |
| A. | l / 8 |
| B. | l / 4 |
| C. | l / 2 |
| D. | l |
| Answer» D. l | |
| 386. |
The stiffness of a closely-coiled helical spring is |
| A. | directly |
| B. | inversely |
| Answer» C. | |
| 387. |
The formation of the bar per unit length in the direction of the force is known as |
| A. | linear strain |
| B. | lateral strain |
| C. | volumetric strain |
| D. | whear strain |
| Answer» B. lateral strain | |
| 388. |
In case of eccentrically loaded struts |
| A. | solid section |
| B. | hollow section |
| C. | composite section |
| D. | reinforced section |
| Answer» D. reinforced section | |
| 389. |
For long columns, the value of buckling load is |
| A. | equal to |
| B. | less than |
| C. | more than |
| Answer» C. more than | |
| 390. |
For biaxial stress, the planes of maximum shear are at right angles to each other and are inclined at 45? to the principal planes. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 391. |
The compression test is carried on |
| A. | ductile |
| B. | brittle |
| C. | malleable |
| D. | plastic |
| Answer» C. malleable | |
| 392. |
When a body is subjected to a direct tensile stress (?) in one plane, then normal stress on an oblique section of the body inclined at an angle ? to the normal of the section is |
| A. | ? cos ? |
| B. | ? cos2 ? |
| C. | ? sin ? |
| D. | ? sin2 ? |
| Answer» C. ? sin ? | |
| 393. |
A rod is enclosed centrally in a tube and the assembly is lightened by rigid washers. If the assembly is subjected to a compressive load, then |
| A. | rod is under compression |
| B. | tube is under compression |
| C. | both rod and tube are under compression |
| D. | rube is under tension and rod is under compression |
| Answer» D. rube is under tension and rod is under compression | |
| 394. |
A solid cube is subjected to equal normal forces of the same type on all its faces. The ratio volumetric strain/liner strain in any of the three xes will be |
| A. | 3 |
| B. | 1 |
| C. | 4 |
| D. | 2 |
| E. | 6 |
| Answer» B. 1 | |
| 395. |
The shear force at a certain point on a beam changes sign form +ve value to -ve value or vice versa. The bending moment at that point will be zero. |
| A. | True |
| B. | False |
| Answer» C. | |
| 396. |
Under uniaxial strain, the ratio of maximum shearing strain to uniaxial strain is |
| A. | 2 |
| B. | 1.5 |
| C. | 1 |
| D. | 0.5 |
| E. | None of the above |
| Answer» E. None of the above | |
| 397. |
The ratio of shear modulus to the modulus of elasticity when Poisson's ratio is 0.25 will be |
| A. | 0.4 |
| B. | 4 |
| C. | 1.4 |
| D. | 2 |
| E. | 3 |
| Answer» B. 4 | |
| 398. |
Poisson's ratio is the ratio of linear strain to the volumetric strain. |
| A. | True |
| B. | False |
| Answer» C. | |