MCQOPTIONS
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MCQOPTIONS
This section includes 20 Mcqs, each offering curated multiple-choice questions to sharpen your Machine Design knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Flexible shafts have ______ rigidity in bending moment. |
| A. | High |
| B. | Low |
| C. | Very high |
| D. | Extremely low |
| Answer» C. Very high | |
| 2. |
The strength of hollow shaft is more than the strength of solid shaft of same weight. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3. |
The stiffness of solid shaft is more than the stiffness of hollow shaft with same weight. |
| A. | True |
| B. | False |
| Answer» C. | |
| 4. |
If yielding strength=400N/mm², the find the permissible shear stress according to ASME standards. |
| A. | 72 N/mm² |
| B. | 76 N/mm² |
| C. | 268 N/mm² |
| D. | 422 N/mm² |
| Answer» B. 76 N/mm² | |
| 5. |
Calculate the shaft diameter on rigidity basis if torsional moment is 196000N-mm, length of shaft is 1000mm. Permissible angle of twist per meter is 0.5’ and take G=79300N/mm². |
| A. | None of the listed |
| B. | 41.2mm |
| C. | 35.8mm |
| D. | 38.8mm |
| Answer» C. 35.8mm | |
| 6. |
If allowable shear stress in the shaft is 70N/mm² and torsional and bending moments are M=1185000N-mm and m=330000N-mm, find the diameter of the shaft. |
| A. | 36.8mm |
| B. | 39.7mm |
| C. | 44.7mm |
| D. | 40.3mm |
| Answer» D. 40.3mm | |
| 7. |
CALCULATE_THE_SHAFT_DIAMETER_ON_RIGIDITY_BASIS_IF_TORSIONAL_MOMENT_IS_196000N-MM,_LENGTH_OF_SHAFT_IS_1000MM._PERMISSIBLE_ANGLE_OF_TWIST_PER_METER_IS_0.5‚ÄÖ√Ñ√∂‚ÀÖ√Ë‚ÀÖ¬•_AND_TAKE_G=79300N/MM¬¨¬®‚ÄÖ√¢¬ß.?$# |
| A. | None of the listed |
| B. | 41.2mm |
| C. | 35.8mm |
| D. | 38.8mm |
| Answer» B. 41.2mm | |
| 8. |
The stiffness of solid shaft is more than the stiffness of hollow shaft with same weight.$ |
| A. | True |
| B. | False |
| Answer» B. False | |
| 9. |
If_yielding_strength=400N/mm²,_the_find_the_permissible_shear_stress_according_to_ASME_standards.$# |
| A. | 72 N/mm² |
| B. | 76 N/mm² |
| C. | 268 N/mm² |
| D. | 422 N/mm² |
| Answer» C. 268 N/mm¬¨¬®‚Äö√¢¬ß | |
| 10. |
Flexible shafts have ___ rigidity in torsion making them flexible. |
| A. | Low |
| B. | High |
| C. | Very high |
| D. | Infinitely small |
| Answer» C. Very high | |
| 11. |
Solid shafts are used in epicyclic gearboxes. |
| A. | True |
| B. | False |
| Answer» C. | |
| 12. |
Solid shaft is costlier than hollow shaft of same weight. |
| A. | True |
| B. | False |
| Answer» C. | |
| 13. |
The_strength_of_hollow_shaft_is_more_than_the_strength_of_solid_shaft_of_same_weight. |
| A. | True |
| B. | False |
| Answer» C. | |
| 14. |
If bending moment on point B in horizontal plate is M and in vertical plane is m, then the net bending moment at point B is? |
| A. | M |
| B. | m |
| C. | M+m |
| D. | √M²+m² |
| Answer» C. M+m | |
| 15. |
If allowable shear stress in the shaft is 70N/mm² and torsional and bending moments are M=1185000N-mm and m=330000N-mm, find the diameter of the shaft.$ |
| A. | 36.8mm |
| B. | 39.7mm |
| C. | 44.7mm |
| D. | 40.3mm |
| Answer» E. | |
| 16. |
Calculate the tension in the rope of pulley C. |
| A. | 6778.3N and 7765.3N |
| B. | 5948.15N and 2288.75N |
| C. | 5468.4N ad 8678.3N |
| D. | None of the listed |
| Answer» D. None of the listed | |
| 17. |
Calculate the torque supplied to the shaft. |
| A. | 453.5N-m |
| B. | 549.3N-m |
| C. | 657.3N-m |
| D. | None of the listed |
| Answer» C. 657.3N-m | |
| 18. |
Does ASME Standard take into consideration shock and fatigue factors? |
| A. | Yes |
| B. | No |
| Answer» B. No | |
| 19. |
According to ASME code, maximum allowable shear stress is taken as X% of yield strength or Y% of ultimate strength. |
| A. | X=30 Y=18 |
| B. | X=30 Y=30 |
| C. | X=18 Y=18 |
| D. | X=18 Y=30 |
| Answer» B. X=30 Y=30 | |
| 20. |
While designing shaft on the basis of torsional rigidity, angle of twist is given by? |
| A. | Ml/Gd‚Å¥ |
| B. | 584Ml/Gd‚Å¥ |
| C. | 292 Ml/Gd‚Å¥ |
| D. | None of the mentioned |
| Answer» C. 292 Ml/Gd‚Äö√Ñ√∂‚àö√ñ¬¨‚Ä¢ | |